7 Installation
Connecting the communication card
Installation and Operation Manual for Solar Power Inverter M70A EU V1.1 EN 2020-02-20
64
Cable type
Shielded and twisted pair cable
(CAT5 or CAT6)
Cable diameter 2x 7.2 mm
Wire cross-section 0.25–1.5 mm
2
Table 7.2.: Specication of the communication cable
The communication cable is required for connection to the follow-
ing units:
● Data logger
● External alarm unit
● Ripple control receiver
● External power-o
Lay the communication cable with a suitable clearance to the AC
and DC cables to prevent interference in the data connection.
7.7 Connecting the communication card
The connections for RS485, the dry contacts, the
digital inputs and the external power-o (EPO)
are all on the communication card. This means
that the installation work can be combined.
NOTICE
Water ingress.
► All sealing caps removed during installation
should be stored for later use ( e.g. trans-
portation or storage).
7.7.1 Connections on the communication card
5 4
1
3
2
6
Fig. 7.37: Components of the communication card
1 Digital inputs and external power-o (terminal block)
2 Power supply for internal fan 1
2 DIP switch for RS485 termination resistor and VCC
3 2 x dry contacts (terminal block)
4 RS485 (terminal block)
5 Protection against electromagnetic interference (EMI)
Connection Connection type
2x RS485 (DATA+ and DATA–) Terminal block
1x VCC (12 V, 0.5 A) Terminal block
6x digital inputs Terminal block
2x dry contacts Terminal block
1x external power-o (EPO) Terminal block
Table 7.1.: Connections on the communication card
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