Allen-Bradley 1747-AIC SLC 500 DH-485 Link Coupler

Allen-Bradley 1747-AIC is an isolated DH-485 link coupler for the SLC 500 family, designed to connect DH-485 networks to SLC 500 processors and peripheral devices. It provides galvanic isolation between the DH-485 communications cable and the attached SLC 500 controller and peripherals, with up to 1500 VDC isolation, helping protect equipment from transients on the network. The unit is powered from 24 VDC and typically draws about 85 mA, requiring a stable 24 V supply in the control panel. Catalog Number 1747-AIC is a legacy part that Rockwell Automation discontinued as of January 31, 2017, so it is most commonly found in older installations or used-market inventories. The DH-485 RJ-45 connection on the coupler bridges the SLC 500's DH-485 port to the broader DH-485 network, enabling data exchange and compatibility with other DH-485 accessories in classic Allen-Bradley configurations. In practice, the 1747-AIC is used to interconnect SLC 500 controllers and I/O modules on a DH-485 network, often alongside programming or diagnostic tools designed for DH-485 communication in legacy AB systems.