Device Communication And System Monitoring; Connections On The Communication Card; Specification Of The Communication Cable; Cable Gland For The Communication Port - Delta M125HV Installation And Operation Manual

5 Planning the installation
Grid and system protection
5.7 Device communication and system
monitoring
Related topics
"6.5 Connecting the communication card", page 57

5.7.1 Connections on the communication card

The connections for RS485, the digital inputs, the
dry contacts and the external power-off (EPO) are
all on the communication card. This means that
the installation work can be combined.
1
3
1 2 x dry contacts
2 DIP switch for the RS485 termination resistor
3 Digital inputs and External Power-Off (EPO)
4 RS485 and VCC
5 Protection against electromagnetic interference (EMI)
Connection
2x RS485 (DATA+ and DATA–)
1x VCC (12 V, 0,5 A)
6x digital inputs
2x dry contacts
1x external power-off (EPO)
Table 5.3.: Overview of connections on the communication card
44
2
4 5
Connection type
Terminal block
Terminal block
Terminal block
Terminal block
Terminal block

5.7.2 Specification of the communication cable

Cable type
Cable diameter
Wire cross-section
Table 5.4.: Specification of the communication cable
The communications cable is required for connection to the fol-
lowing units:
● Data logger
● External alarm unit
● Ripple control receiver
● External power-off
Lay the cable with a suitable clearance to the AC and DC cables
to prevent interference in the data connection.

5.7.3 Cable gland for the communication port

The inverter has 1 cable gland for the communications cable with
2x2 cable feed-throughs.
Installation and operation manual for Solar Power Inverter M125HV EU V1 EN 2019-07-19
Shielded twisted-pair cable (CAT5
or CAT6)
7.2 / 8.7 / 10.0 mm
0.25 ... 1.5 mm
2