Allen-Bradley 1771-KA2

The Allen-Bradley Series 1771-KA2 interfaces PLC-2 family programmable controllers to this network, and makes communication possible, is an A-B Communication Adapter Module (cat. no. 1771-KA2). (See Figure 1.1) It is a Data Highway station interface module and is used with Bulletin 1772 programmable controller processors.
These processors are:
PLC-2 Processor (cat. no. 1772-LR)
PLC-2/20 Processor (cat. no. 1772-LP1, -LP2)
PLC-2/30 Processor (cat. no. 1772-LP3)

A-B designed the 1771-KA2 module to fit in a Bulletin 1771 I/O chassis assembly (cat. no. 1771-A1,-A2,-A4). This chassis houses Mini-PLC-2, Mini-PLC-2/05 and Mini-PLC-2/15 programmable controllers. With one of these controllers, you can use any unoccupied I/O slot for communication adapter modules.

With PLC-2/20 and PLC-2/30 programmable controllers, use a Bulletin 1771 I/O chassis as an I/O rack. In this case, the 1771-KA2 module can be installed in any chassis slot except the one furthest left. This left-most slot must be occupied by a PLC-2 I/O adapter module (cat. no. 1771-AL or 1771-AS), shown in Figure 2.6, or a backplane jumper board assembly(cat. no. 1771-EY).