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3 Electrical connection
3.3.3
Voltage supply
Connection
Designa-
tion
Voltage supply In +24 V and
GND
3.3.4
Terminating resistors
The terminating resistors of the RS485 interface are deactivated per default. To activate them, switches
1 and 2 must be closed.
The switches are located inside the housing and are accessible through the ventilation slots (1).
NOTE!
To ensure fault-free operation, terminating resistors are required at the beginning and end of an RS485
transmission path.
30
Num-
Symbol and terminal designation
ber
(4)
+
U
-
330
120
330
+24 V
x
GND
+5 V
?
1
1
?
2
2
?
GND
(1)
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