1397 Drives

1397 Drives Selection Guide

1397 Drives Overview

The Bulletin 1397 is a series of Allen-Bradley digital DC drives manufactured by Rockwell Automation. These drives combine powerful performance capabilities and advanced microprocessor technology to produce industrial motors' highly functional and cost-effective control solution (speed and voltage regulation). They are designed to offer accurate, flexible, and precise application operations using digital programming.

Each 1397 DC drive can be programmed and configured locally through a front-mounted control device, like a HIM (Human Interface Module), GPT (Graphic Programming Terminal), etc., or from externally connected Allen-Bradley PLC controllers or SLC 500 control platforms. Reference, metering, and feedback signals can be interfaced to each 1397 drive. These drives can also be controlled remotely using the regulator board terminals.

Note: The Allen-Bradley 1397 drives employ a wireless regulator construction and are available in non-regenerative and regenerative configurations. They come with a standard three-phase full-wave armature converter without a flyback rectifier, an advanced current regulator(digital), encoder capability, and a digital speed regulator for speed or armature voltage regulation using DC tachometer feedback.

Key Features of 1397 Drives

The 1397 drives offer a range of features for versatile configuration across various applications.

1. Diverse AC Input Voltage Ratings:

• 207-253 VAC nominal voltage (Horsepower-rated 1397 drives)
• 414-506 VAC nominal voltage (Horsepower-rated 1397 drives)
• 342-437 VAC nominal voltage (Current-rated 1397 drives)
• 374-477 VAC nominal voltage (Current-rated 1397 drives)
• 50 or 60 Hz Nominal Line Frequency
• Frequency Variation: ±2 cycles of nominal

2. Wide Range of Output Power Ratings:

• 200-240V AC input: 1.5-150 Hp (1.1-111 kW)
• 400-480V AC input: 3-600 Hp (2.2-448 kW)

3. Advanced Control Features:

• Drive over-temperature protection
• Torque-based or speed-based Proportional Integral (PI) control
• Inertia compensation, Droop control
• Proportional Integral (PI) outer loop control
• Process trim, Fixed field control (standard)
• Regulated field control (optional)
• Optional 115 VAC or 24 VDC control inputs

4. Different Motor Control Techniques:

• Compound Wound, Shunt Wound, Auto-tuning
• Control performance: Full wave, 6-SCR
• Non-regenerative and regenerative drive configurations (Motor reversing only with regenerative drives)

5. Extensive Protective Features:

• Motor Overload, Field Loss, Feedback Loss
• Optional Dynamic Braking
• Overcurrent, under-voltage, and overvoltage protection

6. Additional Specifications:

• Supports Encoders, DC Tachometers, Armature Feedback
• Operating speed range with encoder: 200:1
• 3 Preset Speeds (with I/O expansion), Pulse Train Input
• Jog Speeds (independent), Single-phase internal field supply
• External EMC filters
• Available in Open Type, IP20 enclosures
• Fixed screw terminal types (J5 and J6 terminal blocks)
• IP20 / IP54 / IP66 environmental ratings
• LCD remote display
• Canadian Standards (CSA) and U.L. certified

Selection Guidelines

Selecting the right Allen-Bradley 1397 DC drive for a particular motor control application may seem like a simple task of merely matching the drive’s output current and voltage to the power requirements of the motor being controlled. However, many other parameters should be considered to ensure the selected 1397 drive operates satisfactorily. These include:

Control Options

Bulletin 1397 drives are generally available with various control options that can be configured to support a specific motor control application. As such, specify the control options your application requires and select a 1397 drive that includes such optional features.

Some of the available Bulletin 1397 control options include:

• 115 Volts AC Control Interface Card: This remote-mounted 1397 control option allows interfacing of commands and signals to 1397 drives using 115-Volts AC signals. It converts 115-volt AC signals to 24-volt DC signals that operate a 1397 drive. This control interface card requires an external 115V AC power source to operate. 
• I/O Expansion Module: This module mounts on the 1397 chassis, and it provides Bulletin 1397 drives with additional I/O capabilities, including five discrete inputs, two discrete outputs, one frequency input, one frequency output, two analog inputs, and two analog outputs.
• Pulse Encoder Interface: This is a 1397 drive-mounted module that provides an interface to speed feedback signals of a digital pulse encoder for both non-regenerative and regenerative 1397 drives. Regenerative 1397 drives require the use of quadrature pulse encoders.
• AC Tachometer Interface: This module provides AC tachometer speed feedback signals for Bulletin 1397 drives of non-regenerative type and cannot be used along with the optional Pulse Encoder module. It is intended for use with RE-050, RE-045R, or RE-045F Reliance Electric (RE) tachometers.
• Dynamic Braking: The optional dynamic braking kit provides all the hardware, including the resistor grid assembly and appropriate contactors, required to provide dynamic braking when stopping the DC motor being controlled. The 1397-DB-B and 1397-DB-A dynamic braking kits can be panel mounted. 
• AC Line Disconnect: This module can disconnect a three-phase line power at the connected 1397 drive.
• AC Line Filter: This filter allows the application of transformer power of more than 2300V rms to a 1397 drive. It suppresses high-frequency Electromagnetic noise, or Electromagnetic interference (EMI), on the drive’s power and signal lines at such input currents, allowing other electronic/electrical devices in the circuit to function correctly.  
• Enhanced Field Supply: This power supply replaces the standard 1397 field supply. It provides field economy, electric field trim, and the capability to supply a field voltage of 240 VAC and other uncommon AC voltages.
• Regulated Field Supply: It provides field economy and pre-weakening through a fixed reference. It can also offer field weakening for drive operations above the rated base speed. You’ll require a regulated field supply for tachometer feedback.
• Blower Motor Starter: This is a fused AC starter with adjustable overload and interlocking contacts for controlling a three-phase blower motor that cools the DC motor controlled by a 1397 drive.
• Inverting Fault Circuit Breaker: It enables regenerative Bulletin 1397 drives to handle high inertia loads.

Note: Nearly all control connections on the Allen-Bradley 1397 drives are made at the terminal strip on the regulator board at the bottom of each 1397 drive.

Drive Inputs and Outputs

Specify the type and number of I/O points your application requires, then select a 1397 drive whose I/O capability can meet those requirements.

Here are the I/O specifications for 1397 drives:

• Standard Digital Inputs: Each 1397 drive supports ten fixed, 24V DC digital inputs. The logic circuits of the 1397 digital inputs are powered by an internal +24 Volts DC power source or an external +24V DC power supply. The internal power supply (+24 VDC) is available at the drive’s regulator board terminal strip. When an external power supply is utilized, its COMMON terminal should be connected to the 24VCOM (terminal 15) on the drive’s regulator board.
• Standard Analog Inputs: Each Allen-Bradley 1397 DC drive is available with 2 Fixed analog inputs (12 bit + sign, ±1V, ±1V or mA), Analog Reference 1 and Analog Reference 2. The 1397 drives also support Analog Tachometer Feedback. All the supported analog inputs are converted to 12 bits + sign within the 1397 drive at their full range.
• Standard Digital Outputs: The Bulletin 1397 drives support three fixed, 24V DC digital outputs. The logic circuits of the three digital outputs are Normally Open relay contacts when de-energized. When energized (the relay contacts closed), the three logic output circuits stipulate the following drive conditions:
• Running: Terminal 27… 28
• Alarm: Terminal 29… 30
• No Fault: Terminal 31… 32

Note: The digital output terminals are located on the terminal strip of the 1397 regulator board.

• Standard Analog Outputs: Bulletin 1397 drives offer two configurable analog outputs (12-bit + sign, each ±V) as standard. The two configurable analog outputs are available on terminals 26, 25, and 24 of the 1397 regulator board. Terminal 25 provides the common connection for the two output signals. Select signals for the two metered analog outputs are filtered over 100 ms to reduce/eliminate meter fluctuations.

Note: If the standard digital and analog inputs and outputs offered by the 1397 drive you intend to select do not suffice the needs of your motor control application, you can use optional 1397 I/O modules to provide the selected drive with additional I/O capabilities. Available optional 1397 I/O modules include:

• Five (5) Fixed Digital Inputs
• Two (2) Configurable Digital Outputs
• Two (2) Analog Outputs
• Two (2) Analog Inputs
• One (1) Pulse Train Input
• One (1) Pulse Train Output

Required Speed Regulation

Bulletin 1397 drives achieve speed regulation using an encoder, armature voltage, or a DC tachometer. Speed regulation with:

• Encoder:  0.01% of top speed (over a 200:1 operating speed range).
• DC Tachometer: 1%
• Armature Voltage: 2…3% of top speed

Therefore, select a 1397 drive equipped with a digital speed regulator that can achieve the speed regulation capability required by your application.

Communication Options

Ensure that you select a 1397 drive whose supported communication protocols are compatible with the communication networks of your motor control application. Generally, Allen-Bradley 1397 DC drives include an internal ScanPort drive protocol– a communications interface– that supports the following communication networks:

• ControlNet
• DeviceNet – 24 VDC
• RS-232/RS-422/RS-485 serial communication
• Remote I/O
• Bluetooth
• DH-485
• DF1 communication
• EtherNet/IP

Environmental Specifications

It is important to review the environmental specifications of the Allen-Bradley 1397 drive you plan to select to ensure that it will function properly under the intended operating conditions.

Allen-Bradley 1397 DC drives are designed to operate between 32…131°F (0…55°C) ambient temperature without current derating. The working environment relative humidity should range between 5% and 95% (non-condensing) for both the 1397 chassis and cabinet. Also, the selected 1397 drive can be applied at an altitude of 3300 ft (1000 m) without current derating. For each additional 300 meters (1000 feet), the current rating of the 1397 drive should be reduced by 3%.

In addition, the selected 1397 drive should also be installed in a clean, dry location free of extreme temperatures, excessive vibrations, mechanical shock, dust, dirt, and contaminants (like oils, abrasive debris, or corrosive vapors). Also, the intended operating environment for the 1397 drive should be free of electrical noise and electromagnetic interference.  

Note: The Open-Type IP20, NEMA / UL certified enclosures provided with the 1397 drives are intended for indoor use only, as they do not protect against airborne debris or contaminants. The open-type chassis design of the Bulletin 1397 drives is meant to allow users to select a suitable enclosure type for the selected 1397 drive, depending on the environmental factors present in the intended work area.

Existing 1397 Drives

Below are some of the existing Allen-Bradley 1397 digital DC drives you can use for your motor control application.

1397-A030N Drive

This is a non-regenerative Bulletin 1397 digital DC drive. It has an input AC voltage rating of 230V AC, at 60 or 50 Hertz (Hz). Its maximum output power rating is 22 kW (30 Hp).

Note: The 1397-A030N drive does not include any Bulletin 1397 optional features such as an I/O expansion card, dynamic braking kit, control interface card, enhanced field supply, or AC tachometer interface card.

1397-A001R-HAB Drive

This is a regenerative Bulletin 1397 digital DC drive. It operates on an input AC voltage of 230V AC, with a power (output) rating of 1.5 Hp (1.1 kW). It includes a Blank – No functionality– Human Interface Module (code: HAB).

1397-B003R-HA2 Drive

This is a regenerative Bulletin 1397 digital DC drive with an input AC voltage rating of 460V AC, applied at a frequency of 50 or 60 Hertz. Its power (output) rating is 3 Hp (2.2 kW). It features a Programmer/Controller Human Interface Module (Code: HA2) with a Digital Port. As such, users can control all the functions of the 1397-B003R-HA2 drive through the HA2 human interface module.

1397-B007N-L11-HA2 Drive

This is a non-regenerative 1397 digital DC drive featuring a 460V input AC voltage rating and a power (output) rating of 7.5 Hp (5.6 kW). It comes with two optional accessories: a Bulletin 1397 I/O Expansion Card (Code: L11) and a Programmer/Controller Human Interface Module (Code: HA2) with a Digital Potentiometer.

1397-B150R-HAP-PE Drive

This is a Regenerative Bulletin 1397 digital DC drive with a 460V input AC voltage rating and a power(output) rating of 150 Hp (111 kW). It has a Pulse Encoder kit (Code: PE) and a Programmer-only Human Interface Module (Code: HAP).

1397-A075N-HA2-L11 Drive

This is a non-regenerative 1397 digital DC drive featuring a 230V AC input voltage rating and an output power rating of 75 Hp (55 kW). It is available with two optional accessories: a Bulletin 1397 I/O Expansion Card (Code: L11) and a Programmer/Controller Human Interface Module (Code: HA2) with a Digital Potentiometer.