The 1746-IA16 is an Allen Bradley SLC 500 series digital AC input module, part of Rockwell Automation Bulletin 1746 SLC 500 PLC platform. This module is officially discontinued and mostly traded as spare part for older production lines running SLC 500 controllers, compatible with 1746-A4, 1746-A7, 1746-A10 and 1746-A13 chassis.

This 1746-IA16 provides 16 single-ended AC input points rated for 120V AC nominal voltage, with operating input range from 79V AC to 132V AC. It is designed to connect to standard AC sensors, limit switches, push buttons and relay contact signals commonly seen in traditional factory controls. The 16 input channels are organized into two isolated groups of 8 points each, offering group-level isolation to reduce cross-channel interference. Each channel comes with an on-board LED status indicator to show input signal status for quick field troubleshooting.

Module power is supplied from the SLC chassis backplane, no separate external power supply required for module logic. It uses a removable terminal block for field wiring, which simplifies replacement without rewiring the whole sensor circuit during maintenance. The module occupies one slot inside any standard SLC 500 chassis and communicates with the SLC processor via the 1746 backplane bus. Operating temperature range is 0°C to 60°C for cabinet installation, designed for standard indoor control panel environments.

As an end-of-life SLC 500 I/O card, brand new factory stock of 1746-IA16 is no longer released by Rockwell. The units we offer are inspected and function-tested before packing to support emergency repair, spare inventory backup and retrofit jobs for legacy equipment. If you plan long-term system migration away from SLC 500, the modern upgrade path is CompactLogix platform with Compact 5000 I/O modules.

Commonly paired with other SLC 500 components including SLC 5/04, SLC 5/05 processors, 1746 power supplies, relay output modules 1746-OW16 and DC input cards such as 1746-IB16. Contact our sales team to check stock status, request datasheet, wiring diagram or quotation for 1746-IA16 and other SLC 500 series spare parts. We serve machine builders, system integrators and end users with global logistics service.

Related search terms: 1746-IA16 datasheet, 1746-IA16 wiring diagram, 1746-IA16 vs 1746-IB16, 1746-IA16 120V AC input, SLC 500 digital input module.

FAQ
What is 1746-IA16?
1746-IA16 is Allen Bradley SLC 500 16-point 120V AC digital input module for SLC 500 PLC chassis.

Is 1746-IA16 discontinued?
Yes, Rockwell has discontinued the 1746-IA16; it is only available as surplus or tested spare part.

What is the difference between 1746-IA16 and 1746-IB16?
1746-IA16 is 120V AC input; 1746-IB16 is 24V DC sink input module.

How many isolated groups does 1746-IA16 have?
Two groups of 8 channels each with group isolation.

Does 1746-IA16 fit 1746-A4 chassis?
Yes, it fits all SLC 500 1746 chassis including 1746-A4, 1746-A7, 1746-A10 and 1746-A13.

1746-IA16