1770-KF2
Allen Bradley Data Highway or Data Highway Plus Asynchronous (RS-232-C or RS-422-A) Interface Module

The Allen Bradley 1770-KF2 module is a communication interface that links intelligent RS-232-C or RS-422-A (asynchronous) devices to an Allen-Bradley local area network. By setting switches on the 1770-KF2, and changing cables, you can direct communications over a Data Highway or a Peer Communication Link (PCL). With a AB 1770-KF2 module, a computer on a PCL can communicate with any PLC-5 node on the network. Other current Allen-Bradley products that communicate over a PCL are the 1784-T50 Industrial Terminal System and the 1785-KA Communication Adapter Module. The 1770-KF is designed to operate in a control-room environment on a tabletop. It takes its power from an AC wall outlet, and it gives you a choice of full-duplex or half-duplex protocol on its asynchronous link. The module has Data Highway compatibility, and it supports all PCL facilities except internetworking. (Internetworking would indicate that a computer on a PCL could talk to a node on another PCL, or to a station on a Data Highway link. That may be possible in the future, but it isn’t right now. A computer on a Data Highway, though, using a 1770-KF2 and a 1785-KA can communicate with PLC-5s on a PCL.)

1770-KF2 Specifications