Allen-Bradley 1747-KE Interface Module

The Allen-Bradley 1747-KE is a DH-485/RS-232C Interface Module for the SLC 500 family that enables direct bridging between a DH-485 network and DF1-based devices, combining a DH-485 interface with an RS-232C serial path in a single module. It provides a DH-485 port and an RS-232C (DF1) interface for serial communications with PCs and DF1 peripherals, helping integrate AB automation components with legacy serial equipment. Power is drawn from the SLC backplane, requiring both 5 V DC and 24 V DC supplies; typical backplane current is about 150 mA at 5 V and 40 mA at 24 V. Key electrical specs include 500 V DC isolation and a built-in Real Time Clock rated at roughly ±1 minute per month at 25 °C (and ±6 minutes per month at 60 °C), supporting time-stamped data in communications. Common applications include connecting SLC 500 DH-485 networks to RS-232C/DF1 devices, enabling PC programming and data exchange, and bridging legacy AB equipment to DF1 peripherals in manufacturing environments.