Installation and Connection
Modbus
®
RTU / IEC 60870-5-103 via D-SUB
D-SUB
Electro-mechanical assignment
The connection cable must be shielded. The shielding has to be fixed at the
screw which is marked with the ground symbol at the back side of the
device.
61
MRU4
DOK-HB-MRU4-2E
D-SUB assignment - bushing
1 Earthing/shielding
3 RxD TxD - P: High-Level
4 RTS-signal
5 DGND: Ground, neg. Potential of aux voltage supply
6 VP: pos. Potential of the aux voltage supply
8 RxD TxD - N: Low-Level
5
1
9
6