The Allen-Bradley 1745-LP151 programmable logic controller (PLC) comes with an input power supply rating of 85 volts alternating current (AC) to 132 volts alternating current. The frequency rating on this operator terminal is 50 to 60 hertz. This operator terminal comes with a user memory rating of 1200 words. There are several LED indicators on this terminal. The LED indicators are for indicating status such as the CPU Fault LED, DC power led, forced I/O LED, and battery low led. For line input protection alternating current, this programmable logic controller also has an input fuse power compartment. The fuse comes with field-replaceable functionalities.

Eighty-five (85) to one hundred and thirty-two (132) volts alternating current and one hundred and seventy (170) to two hundred and sixty-five (265) volts alternating current is the supply voltage rating on this Allen-Bradley product. There are multiple input and output units. There are ten (10) 85 to 265 volt AC triac outputs, twenty (20) 85 to 132 volt AC inputs, and two (2) relay outputs. Users have the luxury of installing expansion modules. This helps with increasing the capacity and enhancing the overall performance of this programmable logic controller. It should only be done if the embedded I/O is not sufficient for the application control at hand. The optional expansion units supported by this controller are the analog input expansion unit, high-speed input module, basic expansion unit, and the relay output expansion unit. The Allen-Bradley 1745-LP151 programmable logic controller (PLC) features several components. There is one memory module, one I/O channel, an embedded power supply, one communication interface, and one mounting accessory.