JUMO digiLine CR Operating Manual page 39

Wiring diagram for Modbus mode
Modbus master
RS485
A
DC 5 V + (Pin 1)
DC 24 V + (Pin 2)
GND (Pin 3)
A, RxD/TxD+ (Pin 5)
B, RxD/TxD- (Pin 4)
6 Electrical connection
B GND
DC 5 V
_
+
3 A
-
DC 24 V
_
+
3 A
-
~
~
39