The 1746-IB8 is an Allen Bradley SLC 500 series sinking digital input module within Rockwell Automation Bulletin 1746 platform. It is officially discontinued and mainly supplied as spare part for legacy SLC 500 automation systems, compatible with all standard SLC chassis including 1746-A4, 1746-A7, 1746-A10 and 1746-A13.

This 1746-IB8 offers 8 points of 24V DC sinking input, with operating input voltage range from 10V DC to 30V DC. It is designed to receive NPN sensor signals, proximity switches, pushbuttons and dry contact signals widely used in conventional factory control panels. All 8 channels share one common group, equipped with optical coupling and filter circuitry to suppress electrical noise and improve signal stability. Each channel has a dedicated LED status indicator for quick on-site signal checking and troubleshooting.

The module draws its logic power from the SLC chassis backplane and occupies one single slot in the rack. It comes with a removable terminal block for field wiring, which greatly speeds up replacement work without re-terminating field sensors during breakdown repair. The module communicates with SLC 5/03, 5/04, 5/05 processors through the 1746 backplane bus. Its operating temperature range is 0°C to 60°C for cabinet-mounted indoor automation environments.

As an end-of-life SLC 500 I/O card, brand new factory original stock of 1746-IB8 is no longer available from Rockwell official channels. All our available 1746-IB8 units are strictly inspected and function tested before shipment to support emergency repair, spare inventory backup and production line retrofit projects. For long-term system upgrade planning, Rockwell’s recommended migration solution is CompactLogix controller paired with Compact 5000 I/O modules.

It is frequently matched with other SLC 500 spare parts such as 1746-IB16, 1746-IA16, 1746-OW16, SLC power supplies and SLC 500 CPUs. Contact our sales team to verify stock availability, request datasheet, wiring diagram or formal quotation for 1746-IB8 and other SLC 500 series modules. We provide secure packaging and worldwide delivery service for system integrators, machine builders and end users maintaining old PLC systems.

Related search terms: 1746-IB8 datasheet, 1746-IB8 wiring diagram, 1746-IB8 vs 1746-IB16, 1746-IB8 sinking input, SLC 500 24V DC input module.

FAQ
What is 1746-IB8?
1746-IB8 is Allen Bradley SLC 500 8-point 24V DC sinking digital input module for SLC 500 chassis.

Is 1746-IB8 discontinued?
Yes, Rockwell has discontinued 1746-IB8, only surplus and tested spare units are circulating in the market.

What is the difference between 1746-IB8 and 1746-IB16?
1746-IB8 has 8 sinking input channels; 1746-IB16 has 16 sinking input channels, both 24V DC type.

Does 1746-IB8 work with NPN sensors?
Yes, it is a sinking input module and fits NPN output sensors.

Can 1746-IB8 be installed in 1746-A4 chassis?
Yes, it fits all 1746 SLC 500 chassis models.

1746-IB8