Weidmuller WI-I/O-EX: Wireless I/O Expansion Modules v1.11 - Manual (Page 11)

WI-I/O-EX Serial I/O Module User Manual v1.11
WI-IO-EX Manual v1.11 Page 11
You can connect to an WI-GTWY-9-MD1 Module using either MODBUS protocol or E-
Series protocol. E-Series protocol is easier to set up, and we recommend using this
protocol for most applications.
Figure 2-3: Address switches. The address shown is 01.
Connect the RS485 B and A wires to the 4-way connector shown previously in Figure
2-2. An RS485 termination switch is provided. Terminate the last WI-I/O-EX module in
the multi-drop setup as shown in Figure 2-4.
Figure 2-4: RS485 multi-drop connection and termination (only use external
termination for the master if it does not have internal termination).
x10 x1
ON
RS485
termination
switch.
Up = terminate
Down = unterminated
Master WI-I/O-
EX
WI-I/O-
EX
WI-I/O-
EX
A B A B A B A B
Termination
switch up
(terminated)
120 Ω