1746-IM16 Allen-Bradley SLC 500 AC Input Module 16 Channels

June 24, 2026 • 3 min read • wayne • News

Product Summary

The Allen-Bradley 1746-IM16 is a robust SLC 500 discrete AC input module. It features sixteen input channels operating at 170-265 Volts AC. This module provides reliable signal interfacing for demanding industrial automation environments.

Selecting the Right 1746-IM16 for Your System

Procurement managers must verify the electrical specifications carefully. The 1746-IM16 requires a 170-265 Volt AC input range at 47-63 Hertz. This module consumes only 85 milliamps from the 5 Volt DC backplane. It fits directly into any single slot of an SLC 500 chassis. You can install it in a local or expansion rack without issues.

This module offers sixteen input channels within a single group. Each channel has a nominal input current of 12 milliamps. The module exhibits a signal delay of 35 milliseconds for the ON state. It has a 45-millisecond delay for the OFF state transition. These timing characteristics are critical for high-speed control loops.

The module provides a maximum off-state voltage of 50 Volts AC. It also features a maximum off-state current of only 2 milliamps. This ensures clear distinction between active and inactive signals. The module can withstand a maximum inrush current of 1.6 Amperes. This surge capability lasts for a maximum duration of 0.5 milliseconds.

Engineers must consider the environmental constraints for deployment. The 1746-IM16 operates within a temperature range of 0 to 60 degrees Celsius. It functions reliably in a relative humidity of 5 to 95 percent. The module requires a non-condensing environment for safe operation. It can withstand an operational shock of 30 Gs. The module also sustains 2.5 Gs of vibration at 57-200 Hertz.

Installation and Wiring Best Practices

You must install the 1746-IM16 into any available SLC 500 I/O chassis. Use a Removable Terminal Block (RTB) for all field wiring connections. The catalog numbers 1746-HT and 1746-HCA are the correct I/O connections. Ensure the chassis power supply provides enough backplane current. The module needs at least 85 milliamps at 5 Volts DC.

Wire each of the sixteen input channels to your 200/240 Volt AC devices. The module provides 16 points per common for efficient wiring. Always verify the input voltage is within the 170-265V AC range. The module provides voltage isolation between inputs and control logic. This isolation is tested at 1500 Volts for robust protection.

The module also meets NEMA standard ICS 2-230 for noise immunity. This certification ensures reliable operation in electrically noisy factories. Always follow the storage temperature guidelines for spares. The storage range is -40 to 85 degrees Celsius. This prevents damage to the module before installation.