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1745-E157

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The 1745-E157 expansion module has been designed and manufactured as part of the SLC 150 product series by Allen-Bradley/Rockwell Automation. It has 12 output terminals which are current sinking transistor outputs or NPN outputs. The 1745-E157 expansion module also has 20 digital inputs. Its memory is CMOS RAM. The 1745-E157 expansion module supports 8 Amps of nominal current and 2000 Volts of electrical isolation between the output contacts.

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Technical specifications for 1745-E157

Manufacturer	Rockwell Automation
Brand	Allen-Bradley
Output Terminals	12
Input Terminals	20
Input Type	Digital
Input Power	10 to 30 Volts DC
Comm Cable	1745-c3
memory	CMOS RAM

Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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The Allen-Bradley 1745-E157 SLC 150 is an I/O module in the SLC 150 I/O module series with 20 current sourcing optically-isolated 10 to 30 Volts DC inputs control with red LED indicators numbered A1-A10 and B1-B10. When used in conjunction with a processor unit, the 1745-E157 can achieve a maximum expansion of up to 112 I/O points. It also has 12 transistor-based and hard contact outputs with 12 red LED indicators. Its hard contact output has a contactor with 10 to 125 Volts DC and a current of 2.5 Amps rating at a resistance of 20 milliohms. The 1745-E157 has an electrical isolation of 2000 Volts tested between output contacts in control logic and uses the Bussman 3 Amps slow blow fuse for circuit protection.

The 1745-E157’s transistor base output has a voltage rating of 10 to 50 Volts DC and a current of 1 Amp which both gradually de-rate at 60 degrees Celsius to 0.5 Amps. It has a surge current of 2 Amps for 20 milliseconds which is repeatable every 2 seconds and a maximum load of 1.0mA at a current leakage of 0.1mA. The base outputs are optically-isolated from a voltage of 1500 Volts tested between control logic and output voltage, and it offers circuit protection through its San-OSOC ST4-2A standard fuse type. The 1745-E157 has a voltage rating between 10 and 30 Volts DC, with an OFF state voltage of 4 Volts at 1.0mA. It inputs also has an ON and OFF filter delay time of 4 to 8 milliseconds. The 1745-E157 has an input nominal current of 8.0 Amps and has an electrical-optical isolation voltage of 1500 Volts between the input voltage and control logic.