OVERVIEW

Official designation: Allen-Bradley 1746-IO12 (SLC 500, Digital I/O Combination Module)

The 1746-IO12 is a compact SLC 500 module combining six 85-132V AC digital inputs and six relay output channels in a single slot. This provides integrated, reliable control for space-constrained applications.

KEY SPECS SUMMARY

Power: 5V DC backplane, 135 mA

Interfaces / Ports: 36-pin terminal block

Indicators: 12 status LEDs (6 input, 6 output)

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: SLC 500 I/O chassis

Limit: 6 AC inputs / 6 relay outputs

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the voltage ratings for the discrete input channels and the relay output channels on the 1746-IO12?

A: Inputs are 85-132V AC; outputs are rated for 24V DC or 120V AC.

Wiring & Installation:

Q: Due to its relay outputs, should external surge suppression be utilized when connecting inductive loads?

A: Yes, external suppression is necessary to protect the module when switching inductive loads.

Troubleshooting & Compatibility:

Q: What is the benefit of using the 1746-IO12 combination module in terms of SLC 500 chassis space usage?

A: It maximizes chassis slot efficiency by integrating two distinct I/O types into one module slot.

Replacement & Upgrades:

Q: What factors influence the selection of a replacement module when migrating from the 1746-IO12?

A: The need for both AC input type and high-power relay output capacity should be matched.