50
Plug
Sensor
Type
aVG
KM BUS (wires interchangeable)
Use the KM BUS distributor (accessories) if several devi-
ces are connected.
KM BUS subscriber (examples):
■ Mixer extension kit M3/HC3
■ Remote control for Vitotrol 200A or Vitotrol 300B (set
the heating circuit assignment at the remote control)
■ EA1 extension, AM1 extension
■ Communication interface Vitocom 100, type GSM2
sVA
Modbus 2 (wires
not
interchangeable)
Connection for electricity meter
J3
Jumper for terminator Modbus 2
Terminator enabled (delivered condition)
Terminator disabled
J4
Jumper for setting master/slave Modbus 2
Heat pump control unit is slave
Heat pump control unit is master (delivered condi-
tion)
X18
Modbus 1
Viessmann devices
If other Viessmann devices are to be connected, plug in
the Modbus distributor (accessory).
X24
Connection, LON communication module (accessory)
X31
Coding card slot
a:D
A
PWM signal, primary pump
a:D
B
PWM signal, secondary pump
a:D
C
PWM signal, circulation pump for cylinder heating
Installation sequence
Electrical connections
(cont.)
5546 267 GB