BM85 Modbus Plus Network Bridge Multiplexer User's Guide

Compatible Devices and Cables
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A.2 Modbus/RS232 Cable Wiring Diagrams
W952
W953W978
CABLE APPLICATION
W978
W952
W953
MODEM
IBM AT
P230, DEC VT100, IBM XT
Figure 25 Modbus/RS232 Cable Wiring Diagrams