Viessmann VITOTRONIC 200 Service Instructions Manual page 158

PCBs and connection options
Main and extension PCB
Plug sXS
Terminals Function
222.3 Control of external heat
222.4 sources with two high limit
safety cut-outs (max. 70 °C)
for the heat pump and to
shut down the secondary
pump.
Plug sXD
Terminals Function
223.1 Central fault message.
223.2
U
Plug sXF
Terminals Function
224.2 Primary pump for heat pump
stage 2 (if installed).
2.
224.3 Secondary pump for heat
pump stage 2 (if installed).
2.
158
(cont.)
Explanation
Floating contact.
Connection values (contact breaking
capacity)
■ Voltage: 230 V~
■ Max. switching current: 4 (2) A
Connections for high limit safety cut-out
on site
■ In series to the secondary pump (ter-
minal 211.2 on main PCB).
■ In series to control external heat sour-
ces.
Explanation
Floating contact:
■ Closed: Fault
■ Open: No fault
■ Not suitable for safety LV.
Connection values (contact breaking
capacity)
■ Voltage: 230 V~
■ Max. switching current: 4 (2) A
Explanation
Connection values
■ Output: 200 W
■ Voltage: 230 V~
■ Max. switching current: 4 (2) A
Connection values
■ Output: 130 W
■ Voltage: 230 V~
■ Max. switching current: 4 (2) A