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Siemens
User Manual
CE1U2357en
Building Technologies
3 Mounting and installation
2014-07-30
Terminal markings
Use
Terminal
Type of connector
L
Phase AC 230 V basic unit
N
L
AGP4S.03E/109
Protective earth
N
Neutral conductor
QX21 Mixing valve opening
T
AGP8S.04B/109
N
Neutral conductor
Protective earth
QX22 Mixing valve closing
N
Neutral conductor
S
AGP8S.03B/109
Protective earth
QX23 Heating circuit pump
Use
Terminal
Type of connector
X30
Operator unit / boiler control panel
-
AVS82.491/109
BX21 Flow temperature sensor HC2
AGP4S.02F/109
M
Ground
n
H2
Digital input
AGP4S.02F/109
M
Ground
n
Mains voltage
Low-voltage