en – Original instructions
28
A2
GND
B1
Communication
A1
Bus
GND
RS485 port 2: RS485-2P A (+) active
9
only with optional module
8 Electronic GND
7 RS485 port 1: RS485-1N B (-)
6 RS485 port 1: RS485-1P A (+)
5 Electronic GND
ACT, HCS control mode: RS 485 port 1
for external communication
Control mode MSE, MSY: RS 485 port 1
for multi-pump systems