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Allen Bradley - PLC

SLC 500

The Allen-Bradley SLC 500 is a compact and powerful family of programmable controllers designed for a range of standalone and distributed control and monitoring applications. The family is modular chassis-based and includes a processor module, I/O modules, communication modules, and power supply. SLC 500 series provides up to 64 KB of configurable storage capability for data and programs and more than 60 types of I/O modules with a variety of networking options. The family allows configuration of up to 3 local chassis offering a maximum of 30 local I/O modules. The chassis is available in 4, 7,10, and 13-slot versions, and multiple chassis can be connected together via interconnection cables. Remote I/O locations can be connected via ControlNet, DeviceNet, or Univeral I/O links using communication interface modules. The family uses RSLogix 500 ladder logic programming software providing powerful, flexible, and convenient editors and diagnostic tools. SLC 500 provides 5 processor types namely SLC 5/01, SLC 5/02, SLC 5/03, SLC 5/04 and SLC 5/05. The controllers allow additional accessories including memory modules, adapter sockets, and program storage devices. Components of the SLC 500 family are designed to work in robust environmental conditions with operation in a temperature range of 0 to 60 °C (32 to 140 °F) and humidity levels of 5 to 95% without condensation. The components can withstand vibration during operation of up to 1 g @ 5 to 2000 Hz as well as the shock of 30 g (3 pulses, 11 ms). SLC 500 is UL, c-UL, CE, C-Tick, and KC certified for all applicable directives.

Collage of images depicting SLC 500 units

SLC 500 Selection Guide

The SLC 500 is a series of small, chassis-based modular programmable controllers (PLCs) and I/O modules. This control platform is designed and built by Allen-Bradley/Rockwell Automation for industrial environments. It is capable of handling extremes in mechanical shock and vibration, as well as withstanding a wide range of humidity and temperature conditions.

The SLC 500 is available with a maximum of 64K of program/configurable data memory. Hence, the SLC 500 processors can provide power, flexibility, and expanded I/O options to take on a wide range of control applications that previously required larger and more expensive control solutions. Also, SLC 500 modular I/O systems provide more than 60 types of I/O modules, which you can use to customize your control application with a broad selection of I/O options, including discrete, analog, and numerous specialty I/O modules from Rockwell Automation and third-party partners.

Overall, an SLC 500 control system can address high-speed processes and discrete control applications from a single control platform. As either a Stand-Alone control system with a processor and I/O modules connected in a single 1746 chassis having a power supply, or as a Distributed control system that can utilize distributed I/O, multiple controllers connected across networks, or I/O in multiple control platforms connected over multiple I/O links and distributed in many locations. This makes the system ideal for fast-paced control operations like packaging machines and bottling lines.

All the aforementioned features have helped to make the Allen-Bradley SLC 500 the premier small logic control system available in the market today. More than a decade after its introduction, the SLC 500 system is still a gold standard of small-size, full-featured programmable logic control systems that are currently in use. Therefore, whenever you’re selecting an SLC 500 system, you must specify the right components to get the most out of its features. This article will provide you with a checklist to use as a guide to completing the specifications of your SLC 500 system.

Selection Criteria

With SLC 500 modular control systems you select the appropriate I/O modules, Communication Modules, Processor, Chassis, and Power Supply selections to fit your application. You can use the following selection checklist for SLC 500 Systems as a guide to completing your control system specification, depending on your application requirements.

Select I/O Modules

SLC 500 I/O Modules are available in a variety of voltage options and densities. Some modules have individually isolated inputs/outputs, diagnostic features, or electronic fuses for protection. You can choose from over 60 digital, analog, and specialty SLC 500 I/O modules to control discrete, analog, and temperature signals. Moreover, you can select any of the available specialty modules for your high-speed counting, temperature, hydraulic, motion and positioning, or press control applications. Note, that the selected specialty module should fit directly into the 1746 chassis.

This complete and varied assortment of I/O modules will provide you with the flexibility and speed you need to create and configure a custom solution for your SLC 500 control application. Select the SLC 500 I/O modules that exactly match your application requirements. You can also include combination modules that will allow you to have inputs and outputs in a single slot for optimal use of the available chassis space.

Some of the SLC 500 I/O modules provided by Rockwell Automation are available in the following categories:

  • 1746 Digital I/O Modules: These modules are available in a broad range of densities including 4-, 8-, 16-, and 32-points. They can interface to an assortment of AC (alternating current), DC (direct current), and Transistor–Transistor Logic (TTL) voltage levels. The 1746 digital output modules are available with solid-state AC/DC and relay contact type outputs. For added flexibility, combination digital I/O modules with 6 inputs/6 outputs, 4 inputs/4 outputs, and 2 inputs/2 outputs are also available. Generally, 1746 digital I/O are high-quality modules designed and tested for industrial applications; you can thus use them in a variety of harsh industrial environments. For example, fast response DC inputs and high-density 32-point DC I/O modules allow SLC 500 systems to be applied in a broader spectrum of industrial control applications.
  • 1746 Analog I/O Modules: These modules feature user-selectable current or voltage inputs, diagnostic feedback, backplane isolation, and Removable Terminal Blocks (RTBs). The input channels of the 1746-NI4, 1746-NIO4I, and 1746-NIO4V analog modules are filtered to eliminate high-frequency noise and provide a high resolution of 14- to 16-bit that is range-dependent. Also, all 4-channel analog output modules (1746-NO4I, 1746-NO4V) provide 14-bit resolution and a conversion rate of 2.5 milliseconds.
  • SLC 500 Thermocouple/mV Input Modules: They include the 1746-NT4, 1746-NT8, and 1746-INT4 modules. All these modules accept millivolt analog signals which cannot be detected by standard 1746 analog modules. Also, all the modules in this category interface to different thermocouple types, including J, K, T, E, R, S, B, and N.
  • RTD Resistance Input Modules: They include 1746-NR4 and 1746-NR8 RTD modules. These modules provide four filter frequency options, allowing you to select the level of input noise filtering that is appropriate for your application and the surrounding environment.
  • High-Speed Counter Modules: The 1746-HSCE module provides bidirectional counting of high-speed inputs from various high-speed switches and quadrature encoders.
  • Blow Molding Modules: The 1746-BLM module is an intelligent I/O module that is used on most types of blow molding machines to provide up to 4 axes of closed-loop parison control.
  • Stepper Control Modules: The 1746-HSTP1 is a single-axis, single-slot stepper module capable of providing a maximum of 250 kHz pulse train outputs to be used in micro-stepping applications. It operates with a variety of SLC 500 processors.

I/O Wiring Systems

After you have selected the type of SLC 500 I/O modules that will meet your precise control needs, check their wiring requirements. Some SLC 500 I/O modules require Interface Modules (IFMs) and/or pre-wired 1492 cables.

Select Communication Modules/Devices

Rockwell Automation offers a variety of SLC 500 communication modules and devices which support different communication networks, including DeviceNet, ControlNet, EtherNet/IP, DH-485, DH+, Universal Remote I/O, and Serial Networks. You should determine the communication network requirements for your application and select the necessary SLC 500 communication modules/devices. Also, include the appropriate communication cables to interface the selected communication modules to the controller and other devices.

  • EtherNet/IP: This is an open industrial networking standard that uses commercial, off-the-shelf physical media and Ethernet equipment. The Ethernet network is well-suited for high-speed transfer of data between information systems and/or multiple controllers, program maintenance, and Intranet/Internet connections. Hence, an Ethernet network will provide you with many possibilities because you can maximize communication between a great variety of equipment from multiple vendors. Please take note that for an Internet connection, you will need the TCP/IP protocol. In the SLC 500 family, EtherNet/IP connectivity is provided by the SLC 5/05 processors. Ethernet communications in SLC 5/05 processors take place at 10Mbps or 100Mbps, providing you with a high-speed network for data acquisition, operator interface, peer-to-peer messaging, program upload/download, and online editing.
  • ControlNet: This network enables intelligent, high-speed control devices to exchange information required for programming, remote device configuration, operator interface, work-cell coordination, supervisory control, and troubleshooting. ControlNet connectivity in SLC 500 systems is provided by the following interfaces:
    • ControlNet Messaging Module (1747-KFC15): It provides unscheduled ControlNet network connectivity for SLC 5/03 and higher processors. With unscheduled messaging, you can access and edit your SLC 500 controller program or send peer-to-peer messages over the ControlNet network.
    • ControlNet Scanner (1747-SCNR): This module provides scheduled ControlNet connectivity for SLC 5/03 and higher processors. With scheduled messaging, you can use the SLC processor to control real-time I/O events on the ControlNet network.
    • ControlNet Adapters (1747-ACN15 and 1747-ACNR15): These adapter modules provide both unscheduled and scheduled ControlNet connections for 1746 I/O modules. They enable SLC 500 systems to control up to three 1746 Chassis (with 30 slots) of analog, discrete, and specialty I/O modules over a ControlNet network.
  • DeviceNet: This network provides a significant reduction in wiring and high-speed access to plant-floor devices and data. The following interfaces provide DeviceNet connectivity for SLC 500 control systems:
    • DeviceNet Scanner Module (1747-SDN): This module acts as an interface between SLC 5/02 or higher processors and DeviceNet devices. Through the DeviceNet network, the module can monitor the operational status, download configuration data, read inputs, and write outputs.
    • DeviceNet Interface Device (1761-NET-DNI): The DNI (DeviceNet Interface) gets the full-duplex DF1 commands and bundles them up in the DeviceNet protocol before sending them over to a target DNI. The target DNI acts as an interface for DF1 end devices to the DeviceNet network. When removing the DeviceNet information, it passes the DF1 commands to the end device.
  • Data Highway Plus (DH+): This network supports data acquisition and remote programming for plant-floor control applications. You can use DH+ communication modules if you want to implement a peer-to-peer network for your SLC 500 system.
  • DH-485 Network: This communication network enables plant-floor devices to share information. Through the DH-485 network, SLC 500 application programs can perform data acquisition, monitor device and process parameters and statuses, including alarm and fault detection, download/upload PLC programs over the network, and perform supervisory control functions.
  • Universal Remote I/O: This is a control network that provides connections between SLC 500 controllers and remote or built-in remote I/O adapters. Its typical applications range is from simple I/O links with 1746 I/O and SLC 500 controllers to distributed control systems with a variety of other devices and multiple I/O controllers that communicate with a supervisory controller. In SLC 500 systems, Universal Remote I/O connectivity is provided by the following interfaces: the 1747-SN remote I/O scanner, the 1747-BSN backup remote I/O scanner, the 1747-ASB remote I/O adapter module, and the 1747-DCM direct communication module.
  • Serial Network: SLC 5/03, SLC 5/04, and SLC 5/05 processors have a built-in serial port that is configurable for RS-422A, RS-423, or RS-232 compatible communications via a serial network. You can use the serial port to connect devices that communicate using the DF1 protocol, such as programming workstations, communication modules, modems, or other Encompass partner devices, as well as devices that send and receive ASCII characters, such as bar-code readers, printers, and ASCII terminals.

Select an SLC Processor

Select the most appropriate SLC 500 processor for your application based on memory, speed (performance), number of supported I/O, communication options, and programming requirements.

The available Allen-Bradley SLC 500 Processors from which you can choose include:

  • SLC 5/01 Processors (1747-L511 and 1747-L514): These processors provide a comprehensive set of 51 Ladder Logic programming instructions in a modular hardware configuration, with the choice of 1K or 4K program memory size. They support DH-485 communication channels, for peer-to-peer response only. An SLC 5/01 processor can control from 4 I/O points up to 3940 I/O points. In modular 1746 I/O systems, you can configure such a processor with a maximum of three chassis (30 slots in total). Note that the 1747-L511 processor requires a capacitor backup (battery backup is optional), while the standard for the 1747-L514 processor is a battery backup.
  • SLC 5/02 Processors (1747-L524): These processors provide increased processor speed over the SLC 5/01 with additional instructions, additional peer-to-peer communication options, and increased diagnostics. They provide a program memory size of 4K instructions, a PID feature for closed-loop process control, index addressing, an Interrupt capability of a 10-millisecond Selectable Timed Interrupt (STI), user fault routines, and battery-backed RAM. SLC 5/02 Processors support DH-485 communication channels for both initial and response peer-to-peer communication. They also have the capability of solving 32-bit signed math functions.
  • SLC 5/03 Processors (1747-L531 and 1747-L532): These are high-performance processors, as they provide faster throughput times of 1 millisecond for a typical 1K user-defined program. SLC 5/03 Processors can provide 32K, 16K, or 8K of user memory. With these processors, you can connect to external intelligent devices without the need for additional interface modules, as they offer an inbuilt RS-232 channel. Modular I/O systems with SLC 5/03 processors can control a maximum of 4096 I/O points and they can be configured with a maximum of 3 chassis (30 slots in total).
  • SLC 5/04 Processors (1747-L541, 1747-L542, and 1747-L543): These processors provide DH+ communications in addition to the baseline functionality of the SLC 5/03 processors. As the standard DH-485 port is replaced with a DH+ port, communications through the DH+ network are 3 to 12 times faster than DH-485 communications. This provides high-speed SLC 5/04-to-SLC 5/04 communications with increased performance levels and direct connection to PLC-5 controllers. In addition, the SLC 5/04 processors provide program memory options of 16K, 32K, or 64K. They can control up to 4096 I/O points with up to 3 chassis (30 slots in total).  A key feature of these processors is an SLC 5/04P option, which contains algorithms specifically designed for the control of Plastics Machinery.
  • SLC 5/05 Processors (1747-L551, 1747-L552, and 1747-L553): These provide similar control functionality as the SLC 5/04 processors but use standard Ethernet communications instead of DH+ communications. They support Ethernet communications at 10 Mbps or 100 Mbps, providing you with a high-performance network for data acquisition, peer-to-peer messaging, operator interface, program upload/download, and online editing. These controllers offer a variety of program memory sizes (16K, 32K, or 64K), allowing you to closely match your SLC 500 application needs. Also, you can configure modular I/O systems with SLC 5/05 Processors with up to 3 chassis (30 slots in total), as well as a maximum of 4096 I/O points.

Select an SLC Chassis

The SLC 500 chassis hosts the I/O modules and the processor. Each chassis in your system should have a power supply. The power supply is mounted on the left side of the 1746 chassis. While the first slot in the first chassis (in case of 3 or 2 chassis) is set aside for the SLC 500 processor or any of the following adapter modules: 1747-ASB, 1747-ACNR15, or 1747-ACN15.

Modular style SLC 500 chassis provide flexibility in system configuration. You can choose any of the following four sizes of chassis: the 1746-A4 (4-slot chassis), the 1746-A7 (7-slot chassis), the 1746-A10 (10-slot chassis), and the 1746-A13 (13-slot chassis).

Note, that tools are not required to insert or remove the SLC 500 processor or I/O modules as all of the components of your SLC 500 system should slide easily into the chassis along with the provided guides. You can connect several chassis to form a chassis system (with a maximum of 3 chassis) using interconnect cables. Therefore, ensure that you select the right sizes of chassis to interconnect cables.

Select an SLC 500 Power Supply

When configuring an SLC 500 modular system, every 1746 chassis requires a power supply to power the I/O modules and the processor. Ensure you use the available power supply loading worksheet to provide sufficient power to your SLC 500 system. Careful power supply selection results in the best performance. However, excessive loading of the power supply outputs can lead to power supply shutdown or premature failure of the entire SLC 500 system. Also, whenever you’re selecting a power supply, make sure that you account for the future expansion needs of your SLC 500 system.

Allen-Bradley provides seven different SLC 500 power supplies: three AC and four DC. You can configure the AC power supplies to operate between 120 and 240 volts AC. No special wiring is required for AC power supplies since you can easily select either 120 or 240 volts AC with a jumper wire.

SLC 500 Power Supplies
  • 1746-P1: This power supply has a line voltage of 85 to 132 volts AC and 170 to 265 volts AC at a frequency of 47 to 63 hertz. The internal current capacity is rated at 2 amperes at 5 volts DC and 0.46 amperes at 24 volts DC.
  • 1746-P2: This power supply has a line voltage of 85 to 132 volts AC and 170 to 265 volts AC at a frequency of 47 to 63 hertz. The internal current capacity is rated at 5 amperes at 5 volts DC and 0.96 amperes at 24 volts DC.
  • 1746-P3: This power supply has a line voltage of 19.2 to 28.8 volts DC. The internal current capacity is rated at 3.6 amperes at 5 volts DC and 0.87 amperes at 24 volts DC.
  • 1746-P4: This power supply has a line voltage of 85 to 132 volts AC and 170 to 265 volts AC at a frequency of 47 to 63 hertz. The internal current capacity is rated at 10.0 amperes at 5 volts DC and 2.88 amperes at 24 volts DC.
  • 1746-P5: This power supply has a line voltage of 90 to 140 volts DC. The internal current capacity is rated at 5 amperes at 5 volts DC and 0.96 amperes at 24 volts DC.
  • 1746-P6: This power supply has a line voltage of 30 to 60 volts DC. The internal current capacity is rated at 5 amperes at 5 volts DC and 0.96 amperes at 24 volts DC.
  • 1746-P7: This power supply has a line voltage of 10 to 30 volts DC. The internal current capacity for a 12-volt DC input is 2 amperes at 5 volts DC and 0.46 amperes at 24 volts DC. Additionally, the internal current capacity for a 24-volt DC input is 3.6 amperes at 5 volts DC and 0.87 amperes at 24 volts DC.

Select a Lithium Battery Assembly

You should also select a replaceable 1747-BA Lithium Battery to provide backup power for the processor RAM. If you’re using SLC 5/01 Processors, the selected battery should provide backup power for at least 5 years for the 1747-L511 processor and 2 years for the 1747-L514 processor. In case you’re using either SLC 5/02, SLC 5/03, SLC 5/04, or SLC 5/05 processors, select a Lithium battery that can provide backup power for approximately two years.

Browse our selection of SLC 500 units

AutomationStop.com's online catalog offers one of the largest selections of preowned SLC 500 units in the world.

1746-NO4I

The Allen-Bradley 1746-NO4I is an SLC 500 series Analog Current Output Module designed for machine monitoring and control applications. The output module has 4 Non-isolated Channels supporting an output current range of 0 to +20 mA. The module has a maximum backplane current of 55 mA at 5 V and 195 mA at 24 V. The module has 14 bit resolution, a 2.5 ms step response and is compatible with SLC 500 fixed or modular hardware.

1746-NO4V

The Allen-Bradley 1746-NO4V is an Analog Voltage Output Module of the SLC 500 modular hardware family. The output module has 4 voltage outputs with an output range of ±10V DC. The module requires a supply of 5V DC and 24V DC from the backplane or an external supply of 24V DC. Its backplane current rating is 55mA at 5V DC. The module has a 14-bit resolution and supports a diverse range of control and monitoring applications.

1746-NO8I

The Allen-Bradley 1746-NO8I is an SLC 500 series Analog Current Output Module with 8 independently configurable current outputs having an output range of 0 to +20 mA. The output module class 1/3 operation, requires a single slot for 8 outputs, 16-bit resolution, and high reliability through 500V DC field-wiring-to-backplane isolation designed to protect the processor and chassis. It requires a removable terminal block for connection to the 8 output channels.

1746-NO8V

The 1746-NO8V is an SLC 500 analog output module that belongs to the SLC 500 product line. The output voltage range of its 8 single-ended analog output channels is 10.25 volts DC. The SLC module provides a 16-bit, 320 V/count resolution with an overall accuracy of 0.1 percent at 25°C and 0.2 percent at 60°C.

1746-NR4

The Allen-Bradley 1746-NR4 is an SLC 500 series RTD/Resistance Analog Input Module with 4 RTD inputs. The module is able to receive digitally converted analog data from RTD and other resistance inputs connected to its terminals. This data is stored for use by SLC 500 processors. The 1746-NR4 module can retrieve data from up to 4 RTDs of different types and in any combination. It is equipped with input status indication LEDs.

1746-NR8

Allen-Bradley 1746-NR8 is an SLC 500, 8 Point RTD Resistance Analog Input Module. The input module supports a maximum of 8 RTD sensors of various types, or direct input of resistance devices connected to its input channels. Its purpose is to scale and convert the RTD inputs to temperature. The module can be connected to the SLC 500 chassis hardware. It has a backplane current consumption of 55/ 100 mA at 24/ 5 V DC.

1746-NT4

The Allen-Bradley 1746-NT4 is a Class 1 Thermocouple/mV Analog Input Module part of the SLC 500 series. The module has 4 input channels that support direct ±50 mV and ±100 mV analog input signals. It receives digitally converted data from the 4 thermocouples and/or millivolt (mV) sensors. This stored data can then be accessed by the modular SLC 500 processors. The 1746-NT4 module is used with a removable terminal block and occupies a slot in the SLC 500 chassis.

1746-NT8

The Allen-Bradley 1746-NT8 is an SLC 500 series, Class 1 Thermocouple/mV Analog Input Module with 8 input words and 8 output words. It acquires digitally converted data from up to 8 connected thermocouples and/or millivolt (mV) sensors with an input range of ±50 mV and ±100 mV. The data is stored and retrieved by the SLC 500 processors. The module is designed to fit into the SLC 500 chassis at any single slot for I/O modules except the designated processor slot (0).

1746-OA16

The Allen Bradley 1746-OA16 is an SLC 500 AC output module. The module is designed to have 16 output points with 8 points per common. The module operates in a voltage range of 85 to 265 VAC at 47 to 63 Hz. The module is designed to be inserted into a single slot within the chassis of the SLC 500 modular hardware. It offers fast and reliable operation with a signal on/off delay times of 1 ms/11 ms.

1746-OA8

The Allen-Bradley 1746-OA8 is an AC output module from the SLC 500 line of products. This module has eight (8) output channels divided into two (2) groups of four (4) output channels each. The required voltage for this module to operate ranges from 85 volts AC to 264 volts AC at a frequency ranging from 47 hertz to 63 hertz. At 5 volts DC, the 1746-OA8 has a rated backplane current of 185 milliamperes. Except for the first slot, which is reserved for an SLC 500 CPU, the 1746-OA8 fits into any open slot on a 1746 chassis.

1746-OAP12

The GE Fanuc 1746-OAP12 is an AC output module from the SLC 500 product series. This module has twelve (12) output channels with 120/240-volt AC signal voltages. This module operates at a voltage ranging from 85 to 265 volts AC at a frequency of 47 to 63 hertz. The 1746-OAP12 consumes 0.370 amperes of backplane current at 5 volts DC. It has a maximum off-state leakage of 2 milliamperes, as well as a minimum load current of 10 milliamperes. The 1746-OAP12 should operate at a temperature that ranges from 0 to 60 degrees Celsius. Additionally, it should be stored at a temperature ranging from -40 to 85 degrees Celsius. The isolation voltage of the 1746-OAP12 is 1500 volts.

1746-OB16

The Allen Bradley 1746-OB16 is an SLC 500 series Current Sourcing DC Output Module. The module has 16 channels with 16 points per common and an operating voltage range of 10 to 50V DC. It has a backplane current consumption of 135 mA at 5 V DC and 280 mA at 24 V DC. The DC output module provides efficient performance with an ON/OFF delay of 0.1 ms. The module is designed to provide electronic protection against current overload and short circuits.

1746-OB16E

Produced by Allen Bradley, catalog number 1746-OB16E is a digital DC output module. The 1746-OB16E is rated at 24 volts DC signal output. It has sixteen output points with sixteen output points per common. This module requires a 10 to 30-volt DC voltage to operate properly. At 5 volts DC, the 1746-OB16E has a 0.135-ampere backplane current consumption. This Allen Bradley product has a continuous current of 1.0 ampere at 30 degrees Celsius and 0.50 amperes at 60 degrees Celsius per output point. Additionally, the continuous current for the module is 8.0 amperes max at 0 to 60 degrees Celsius.

1746-OB32

The SLC-500 1746-OB32 is a digital DC output module by Allen Bradley. This module is a high-density low current DC output device, which can be mounted into any slot of a 1746 chassis except for slot 0. The module includes 32 outputs with 16 points per common, a 24V DC output voltage, and it can be powered from a 5 or 50V DC source.

1746-OB32E

The 1746-OB32E is an Allen Bradley DC output device compatible with the SLC-500 product line. This 24 Volts DC module has 32 outputs and a 10 to 30 volts DC operating voltage. The continuous current of this module is 4 amperes, and the current backplane usage is 190 milliamperes at 5 volts DC. At 24 volts DC, its current backplane usage is 0 milliamperes.

1746-OB6EI

The 1746-OB6EI is a digital output module with 6 isolated outputs. It is compatible with the SLC 500 series. This module has an output voltage rated at 24 Volts DC. The voltage range of the module is 10-30 Volts DC Source. It has electrical safeguards to prevent it from current overload and short circuits. It has a backplane current of 46 milliamperes at 5 volts DC.

1746-OB8

The 1746-OB8 is an Allen Bradley SLC 500 series digital DC output module. The output device has 8 output channels. The signal output voltage range of this unit's outputs is 24 volts DC. The output module has a total heat dissipation of 6.9 watts and a maximum signal delay of 1 ampere and 8 amperes at 30 degrees Celsius, while 0.5 amperes and 4 amperes at 60 degrees Celsius.

1746-OBP16

The Allen Bradley 1746-OBP16 is a discrete output module featured in the SLC 500 product family. It has a 24VDC output with an incorporated short-circuit protection fuse. It is compatible with a single-slot chassis and is designed for applications requiring a high voltage and current. The backplane current of the module is 250 milliamperes at 5 volts. 

1746-OBP8

Part number 1746-OBP8 is a 24-volt DC output module belonging to the SLC 500 product series. This module has eight (8) output points with four (4) output points per common. The 1746-OBP8 operates at a voltage ranging from 20.4 volts DC to 26.4 volts DC source. This device consumes 0.135 amperes of current from the backplane at 5 volts DC. This product has a 1-milliampere max off-state leakage, as well as a 1-milliampere minimum load current.

1746-OG16

The 1746-OG16 is an Allen-Bradley SLC 500 digital DC TTL output module. This device has sixteen (16) outputs and operates at a voltage range of 4.5 volts DC to 5.5 volts DC. This is a single-slot module that connects to a backplane to power itself. The 1746-OG16 consumes 180 milliamperes of current from the backplane at a 5-volt DC voltage. The off-state voltage of this module ranges from 4.5 volts DC to 5.5 volts DC. The 1746-OG16 has a maximum off-state leakage of 0.1 milliamperes, as well as a minimum load current of 0.15 milliamperes. The continuous current per point of this device is 24 milliamperes.

1746-OV16

The 1746-OV16 is an SLC 500 digital output module. This module has sixteen outputs rated at 24 volts direct current. This output module operates via a voltage that ranges from 10 volts direct current to 50 volts direct current (sinking). The 1746-OV16, at 5 volts direct current, consumes 270 milliamperes of current from the backplane. It has an off-state leakage rating of 1 milliampere max, as well as a load current rating of 1 milliampere minimum. This output module is generally used to power DC-operated electrical devices.

1746-OV32

The Allen-Bradley 1746-OV32 has thirty-two (32) discrete sinking output channels. It features two groups of 16 output channels with a nominal signal voltage of 24 VDC and a voltage range of 5 to 50 VDC. It is capable of being installed with any SLC 500 chassis. High-density output modules, such as the 1746-OV32, have multiple wiring choices. A 40-pin female connector and crimp-style pins are included with the module. The wiring method offered by the 1746-NC3 wiring connector is the default way. The Allen-Bradley 1492 wiring system can also be used to wire the 1746-OV32. The 1492-CABLExx and 1492-IFM40xx DIN-rail mountable terminal blocks are used in this alternate wiring scheme. External I/O can be mounted quickly and easily using this method. This module takes up one (1) slot on the host SLC 500 chassis and can be used as both local and remote I/O. It draws 0.190 amperes at 5 VDC, and it has a 1500 VAC isolation voltage from the backplane for 1 minute. The module has a 0.1-millisecond delay when switching from off to on, with a 1.0-millisecond delay expected when switching from on to off. Because it lacks an electronic protection system, external electronic fusing is advised.

1746-OV8

Catalog number 1746-OV8 is a digital output module that was manufactured by Allen Bradley as part of the SLC 500 series of products. This device has an operating voltage range of 10 to 50 volts DC, as well as a nominal voltage of 24 volts DC. This module's maximum power dissipation per point is 6.9 watts. The 1746-OV8 has LED status indicators for detecting various faults and displaying the operating status.

1746-OVP16

A product of Allen Bradley, catalog number 1746-OVP16 is a digital output module belonging to the SLC 500 line of products. This module has sixteen output channels, as well as a rated operating voltage of 20.4 to 26.4 volts DC (sinking). Additionally, this module's voltage category is rated as 24 volts DC signal output. The on-state voltage drop for this product is a maximum of 1.0 volt at 1.0 ampere.

1746-OW16

The Allen-Bradley 1746-OW16 is an SLC 500 Relay Contact Output Module with 16 channels and 8 outputs per common. The module is compact and occupies a single slot within the SLC 500 chassis. The module has AC/DC operation with a voltage range of 5 to 265V AC or 5 to 125V DC and an output current rating of 16 A. The relay module offers reliable and accurate operation with an on/off delay time of 10 ms.

1746-OW4

The 1746-OW4 is a relay contact output module with 4 relay contact output channels. This module has 4 common points and is an AC/DC relay output unit that can be used for any relay contact type output application. It operates between 5-265 volts AC and 5-125 volts DC. The max backplane current it can draw is 45 mA.

1746-OW8

Product number 1746-OW8 is an SLC 500 digital output module that was manufactured by Allen-Bradley. This digital output module features eight (8) normally open (NO) relay output channels with a 5-265V AC or 5-125V DC operational voltage. There are two (2) output groups, each with four (4) channels. The usage of the 1746-OW8 may obviate the necessity for interposing relays. Interposing relays are commonly used for switching between voltage categories. The requirement for an interposing circuit is eliminated because this module already supports the required feature, conserving panel space and enhancing cost-effectiveness. At a maximum resistive load, this module has a signal delay rating of 10.0 milliseconds for on and off transitions. This product is described as a single-slot device. This module is compatible with remote I/O topologies other than SLC processors.

1746-OX8

The 1746-OX8 is an Allen-Bradley SLC 500 Digital Contact Output Module. This Digital Contact Output Module features 8 N.O. Relay Contact Outputs and a 5-265 Volt AC or 5-125 Volt DC Operating Voltage. It's designed for high-current, individually isolated relay applications. It features a 3 A output current at 120 volts AC and a 1.2 A output current at 24 volts DC. This module's operational voltage ranges from 5-125V AC and 5 to 265V DC. At 5 volts DC, the backplane current consumption is 0.085 A, and at 24 volts DC, it is 0.090 A. It has a maximum resistive load signal delay of 10 milliseconds for both OFF and ON. At 5 VDC, the minimum load current is 10 mA, while the maximum off-state leakage is 0 mA. It's worth noting that the maximum continuous current per module should be 1440 VA. Between the I/O terminals and the control logic, this module offers NEMA standard ICS 2 to 230 noise immunity and electro-optical isolation of 1500 volts. The operational temperature range of this module is 0 to 60 degrees Celsius, especially for the air surrounding the system, and the storage temperature range is -40 to 85 degrees Celsius. It operates with a displacement of 0.015 inches peaking at 5 to 57 Hertz and a 2.5 g acceleration at 57-2000 Hertz. This module's operating shock is 10 g. The heat dissipation of the 1746-OX8 module is 0.825 watts per point, with a minimum of 2.590 watts and a total of 8.60 watts. The module has a make of 3600 VA and a break of 360 VA at a constant 5 A for both AC voltages. The maximum make and break currents for DC voltages are 0.22 A each at 125 VDC and 1.2 A each at 24 VDC.

1746-P1

The Allen-Bradley 1746-P1 is an SLC 500 power supply module. The module has an open style enclosure and can be rack mounted on the left side of a 1746 I/O chassis. The power supply has a backplane output current of 2A at 5 VDC and a user supplied voltage range of 18 to 30 VDC at 24 VDC. It has a rated line voltage range of 85 to 132 VAC and170 to 265 VAC. The isolation rating of the 1746-P1 is 1800 VAC RMS for a duration of one (1) second.

1746-P2

The Allen-Bradley 1746-P2 is a power supply module for the SLC 500 family. This product has an internal current capacity rated at 2 amperes at 5 volts DC, as well as a 24-volt DC user power voltage range of 18-30V DC. It has a rated inrush current of 20 amperes and a typical line power requirement of 180 volt-amperes. The power supply supports an open-style enclosure and status LEDs.

1746-P3

Product number 1746-P3 is an SLC 500 power supply that was designed and produced by Allen Bradley. The line voltage of this device ranges from 19.2 to 28.8 volts DC, and it has a typical line power requirement of 90 volt-amperes. The maximum inrush current of the 1746-P3 is 20 amperes. Additionally, the internal current capacity of this power supply is 3.6 amperes at 5 volts DC and 0.87 amperes at 24 volts DC. It has a 600-volt AC RMS isolation rating for one (1) second. At full load, the 1746-P3 has a CPU hold-up time of 5 milliseconds. At no load, however, the CPU hold-up time is 1000 milliseconds.

1746-P4

The 1746-P4 is an Allen Bradley power supply module compatible with SLC 500 modular hardware. This power supply has a line power requirement of 240 volt-amperes, as well as a 45-ampere maximum inrush current. Its backplane current is specified as 10 amperes at 5 volts DC, along with a user power voltage range of 20.4 to 27.6 volts DC. This product has LED status indicators, and it is externally mounted onto a 1746 I/O chassis.

1746-P5

The 1746-P5 is a power supply module designed to be a part of the SLC 500 line of products from Allen-Bradley. This power supply has a line voltage rating of 90 to 146 volts DC and a current capacity of 5 amperes at 5 volts. This device supports 14 AWG-sized wires. This unit can handle a maximum inrush current of 20 amperes.

1746-P6

The 1746-P6 is a power supply module from the Allen Bradley. This unit is included in the SLC 500 series. It has a 100VA typical line power requirement, a nominal input voltage of 48V DC, and a line voltage of 30-60VDC. The module has a 20-ampere inrush current rating. It draws 5 amperes at 5 VDC and 0.96 amperes at 24VDC. Its operating temperature is 0-60 degrees Celsius.

1746-P7

The Allen-Bradley 1746-P7 is power supply module for the SLC 500 line of products. The line voltage of this product ranges from 10 to 30V DC and the internal current capacity is 2 amperes at 5V DC (12V DC input) and 3.6 amperes at 5V DC (24V DC input). The power supply provides a 24V DC voltage output and comes with built-in soldered fuse protection. The module has an open-style enclosure and is connected to the leftmost slot of a 1746 I/O chassis. The 1746-P7 is equipped with LED status indicators.

1746-QS

The 1746-QS is a synchronized axis control module from Allen-Bradley. This device was designed to be used with SLC 5/03 or SLC 5/04 processor modules. The backplane power requirements of this product include 1.0 ampere at 5 volts direct current (DC) and 200 milliamperes at 24 volts direct current (DC). The 1746-QS has an analog output rating of -10 to +10 volts DC at 5 milliamperes. Additionally, this Allen Bradley product has an output resolution of 12 bits. The update time of this module is 2 milliseconds. This unit is equipped with LED (light-emitting diode) indicators labeled Run, Fault, and Axis.

1746-QV

The 1746-QV is a single slot open-loop velocity control module from Allen Bradley's SLC 500 series.  It has a single linear displacement transducer input and a single analog output. The backplane current rating of this module at 5 volts is 250 milliamperes. The module resolution is 160 inches +/- 0.01 inches.

1746-RT25B

Product number 11746-RT25C is a removable terminal block, or RTB, manufactured by Allen Bradley for the SLC 500 series of products. This terminal has a total of eighteen (18) terminals and sixteen (16) I/O points. This product is typically used with the 1746-OP, -IV, -IB, and -IP DC I/O modules. There is no need to rewire the 1746-RT25B RTB when swapping I/O modules.

1746sc-CTR4

Spectrum Controls manufactured the 1746sc-CTR4 counter/flowmeter module. This device has four quadrature encoder inputs and four external counter inputs. The 1746sc-CTR4 can handle AC (50 millivolts to 75 volts peak), 5-volt DC, 12-volt DC, and 24-volt DC input voltages. This product can also handle input frequencies rated at 50-kilohertz max for AC operations and 50-kilohertz max for DC operations.

1746sc-CTR8

The Allen Bradley 1746sc-CTR8 is a single-ended counter input module with eight channels. This module is a 50-kilohertz counter module that also supports flow meters. Start, stop, reset, and preset counter operations are configurable in this module. The counter speed of the AC/DC inputs ranges from 0 hertz to 50 kilohertz. Additionally, the input frequency of this module's AC/DC inputs ranges from 1 hertz to 50 kilohertz.

1746sc-IA8I

The 1746sc-IA8I is an AC/DC input module included in the SLC 500 product line. It is designed and manufactured by Allen Bradley/Rockwell Automation. There are eight (8) individually isolated input channels with this module. It has an operating voltage range of 80 to 150 volts AC at 47 to 63 hertz and 85 to 170 volts DC.

1746sc-INI4i

Part number 1746sc-INI4i is an isolated-channel analog input module from Spectrum Controls. This module has four (4) differential, sinking input channels. It is a single-slot device that may be installed into various 1746 I/O chassis. This unit has input current ranges consisting of 4 to 20 mA and 0 to 20 mA with a maximum resolution of 312.8 nA per count. The recommended operating temperature ranges from 0 to 60 degrees Celsius, while the recommended storage temperature ranges from -40 to 85 degrees Celsius.

1746sc-INI4vi

Product number 1746sc-INI4vi is an isolated analog input module. It belongs to the SLC 500 product line, and it was manufactured by Spectrum Controls. This module has four differential, individually isolated input channels. The typical backplane current consumption of the 1746sc-INI4vi is 550 mA at 5 VDC and 0 mA at 24 VDC. Additionally, the typical backplane power consumption is 2.75 watts. Furthermore, the normal mode rejection, which is between the positive and negative inputs, is rated as 98 decibels at 50 and 60 hertz.

1746sc-INO4i

The Allen Bradley 1746sc-INO4i is an SLC 500, 4 Channel Isolated Analog Outputs Module. The module is designed to provide a maximum of 4 isolated analog current outputs. The output signals are individually programmable with an output current range selection of 0-20 mA/ 0-21 mA/ 4-20 mA and 0to 20 mA input current. The 1746sc-INO4i output module offers 16-bits of resolution, continuous temperature compensation, and high accuracy comparable to dedicated analog modules.

1746sc-INO4vi

Produced by Spectrum Controls, catalog number 1746sc-INO4vi is an analog output module. It is compatible with the SLC 500 line of products from Allen Bradley. This device consumes a maximum of 120 milliamperes of backplane current at 5 volts DC and 250 milliamperes of backplane current at 24 volts DC. Additionally, the 1746sc-INO4vi typically consumes 0.6 watts of backplane power. The 1746sc-INO4vi has four differential, individually isolated outputs.

1746sc-NI8u

Product number 1746sc-NI8u is a universal analog input module. This module has a total of nine (9) green status indicators. These are utilized to determine the status of each channel, as well as the entire module. This unit has a backplane current comsunption rated at 210 milliamperes at 5 volts DC and 100 milliamperes at 24 volts DC. It also has a backplane power consumption rated at 3.00 watts maximum. This module has a total of eight (8) input channels. This product should be operated at a temperature ranging from 0 to 60 degrees Celsius.

1746sc-NO8i

Catalog number 1746sc-NO8I is a Spectrum Controls analog output module. The 1746sc-NO8I has an RS-232 channel for communicating with various devices, such as operator interfaces. A DH+ connection is also included in this module. This module is made up of several complementary modules, one of which is located in the primary system and the others in the secondary or backup system. The main module is in charge of all Remote I/O activities. The 1746sc-NO8I analog output module was designed to work with SLC 500 controller systems from Allen Bradley. The 1746sc-NO8I output module has eight (8) outputs for connecting other devices.

1746sc-OAP8I

The 1746sc-OAP8I is an isolated AC Triac output module from the SLC 500 product line. The power supply rating of this device ranges from 120 to 240 volts AC. This unit has a 0.375-ampere output rating per module. It has eight (8) outputs. It has a 1500-volt AC isolation voltage, as well as a rated power dissipation of 9.85 watts maximum.

1747-AIC

The 1747-AIC by Allen Bradley is an SLC 500 series isolated link coupler. This coupler is typically utilized to connect SLC 500 modular or fixed devices to the DH-485 network. It connects to a DH-485 cable via a 6-position RTB, or removable terminal block. The coupler requires external power rated at 24 volts DC with a current load of 0.085 amperes. The 1747-AIC coupler may be mounted via a panel to an SLC chassis in slot 0.

1747-ASB

The Allen-Bradley 1747-ASB is an SLC 500 universal Remote I/O adapter module. This module was designed to connect 1746 I/O modules to SLC processors using the Remote I/O network. It has communication rate options of 57.6, 115, and 230 kbit/s and a backplane current of 375 milliamperes at 5 volts DC. The 1747-ASB module has non-volatile memory and can connect to a maximum of 32 adapter modules using node expansion.
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