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Installation and Operation Manual for Solar Power Inverter M70A EU V1.1 EN 2020-02-20

7 Installation

Connecting the communication card

7.7.3 Connecting a data logger via RS485

7.7.3.1 Introduction

NOTICE

Unwanted currents.

In some installation variants, unwanted currents

can ow when multiple inverters are connected

via RS485.

► Do not use GND and VCC.

Terminal assignment of the RS485 terminal block

21 3 4 5 6

1 VCC (+12 V; 0.5 A)

2 GND

3 DATA+ (RS485)

4 DATA– (RS485)

5 DATA+ (RS485)

6 DATA– (RS485)

Fig. 7.38: Terminal assignment of the RS485 terminal block

Terminal pair 3/4 or 5/6 can be used to connect a data logger.

The second terminal pair is only required when connecting sev-

eral inverters via RS485. The second terminal pair can also be

used to connect a PC.

Data format

Baud rate 9600, 19200, 38400; Standard: 19200

Data bits 8

Stop bit 1

Parity Not applicable

DIP switch for the RS485 termination resistor

Fig. 7.1: DIP switch for the RS485 termination resistor

RS485 connection diagram for a single inverter

RS485

Termination resistor = ON

Data logger

Fig. 7.2: RS485 connection diagram for a single inverter

Delta M70A User Manual

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