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Quick Installation Guide for Solar Power Inverter M125HV EU V1 EN 2019-04-01
Overview of communications 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.
3
1
2
4
5
1
2 x dry contacts (terminal box)
2
DIP switch for RS485 termination resistor and VCC
3
Digital inputs and external power-off (terminal block)
4
RS485 (terminal block)
5
Protection against electromagnetic interference (EMI)
Connecting a PC via RS485
To commission an inverter, you need a PC with either the
M125HV commissioning software or the Delta Service Software
(DSS) installed. Connect the PC to the inverter via a USB/RS485
adapter.
Inverter
USB/RS485 adapter
DATA+ Terminal 3 or 5
D+
DATA– Terminal 4 or 6
D–
ATTENTION
Unwanted currents.
Unwanted currents can flow when multiple
inverters are connected via RS485.
► Do not use GND and VCC.
► If the cable shield is used for providing
lightning protection then the housing of only
one inverter in the RS485 chain should be
grounded.
