WATANABE WPMZ Series Instruction Manual page 8

WPMZ Series Modbus communication instruction manual
IM-0887-01
3. Connection diagram
The Modbus connection of WPMZ - 1/3 is shown below.
Please set the terminating resistance to the master and slave at the final end (WPMZ in the
figure below).
When connecting the TERM terminals to each other, the terminating resistance becomes
※
effective.
+
-
Master
SG
With
terminating
resistance
Twisted pair wire
WPMZ-1/3：AWG24～16
※ When WPMZ - 1/3 is
terminated, connect the
TERM terminals together.
Figure 2.4 Modbus connection of WPMZ-1/3
Table 2.5 Modbus connection terminal (WPMZ - 1/3)
Terminal
symbol
number
28,31
29,32
RS485
30
33,34
Shield cable
Contents
Communication plus
＋
terminal
Communication minus
－
terminal
Communication SG
SG
terminal
Terminal resistor
TERM ( *)
terminal (120 Ω)
7
Number of pages：58
+
-
Slave
SG
Shield cable
+
- Slave
SG
Shield cable
+
-
WPMZ
S
G
T
T