BM85 Modbus Plus Network Bridge Multiplexer User's Guide

Compatible Devices and Cables
8888 31007492
A.4 RS485 Ports Pinout
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Part Number
Mounting
Method
Operating
Power
(Nominal)
Modbus Plus
Network
Cable
Serial
Ports
Serial
Protocol
NW–BM85E485 Panel or Shelf 115/230 Vac or
24 Vdc
Single or Dual RS485 Programmable,
User Defined
NW–BM85S485 Panel or Shelf 115/230 Vac or
24 Vdc
Single or Dual RS485 Programmable,
User Defined
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.&+(("*"% #)&(.&+(''#"*"&%*!'%#&%%*&(")

! &+) #+) "%#"% &%%*&('(* %+$(  ")%
'*#)+)*"*+*&(%#&%%*&(&+)
&+) #+) *($"%*"%  &%%*&(  "% *!")
''#"*"&%
54321
9876
REAR PANEL
SERIAL PORT
CONNECTORS
Figure 27 Serial Ports Pinout – RS485
Pin BM85 Direction
Purpose
1 –– Chassis ground
2 In/Out Receive/Transmit A
3 In/Out Receive/Transmit B
4 ... 9 –– not used