Allen-Bradley 1747-AIC Analog Input Card SLC 500

1747-AIC is Allen-Bradley’s Isolated Link Coupler for the SLC 500 family. It’s not an analog input card; rather it serves as the DH-485 network gateway that connects an SLC 500 chassis to a DH-485 communication network, enabling remote devices and controllers to communicate on the same bus while electrically isolated from the backplane. The module installs in a 1747 backplane slot and uses a 6-position removable terminal block for DH-485 wiring. The isolation barrier protects the SLC 500 logic from noise and potential surges on the DH-485 network and is specified at 500 V DC. The 1747-AIC supports standard DH-485 traffic and is commonly used to link RSLogix 500 configurations with remote I/O or multiple SLC controllers across a DH-485 network. In typical configurations, the AIC pairs with SLC-500 processors and other 1747 modules in a modular rack to extend network reach. This part is widely cataloged for legacy automation systems and is offered by authorized distributors with compatibility notes for revisions and DH-485 cabling. When selecting accessories for an SLC-500 DH-485 network, the 1747-AIC acts as the bridge at the rack boundary, ensuring data integrity across the bus and enabling reliable communication for controllers, HMIs, and remote I/O networks.