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Circuit board GM-C3
Electrical connections
10.4
Circuit board GM-C3
Use only flexible cables, e.g. for: pumps, mixers and temperature sensors. Shielded cables must be used for
BUS lines (e.g.: CAN bus, RS485 bus).
These terminals can be used (depending on the configuration):
Terminal
Function
Minimum
cross-sec-
tion
Standard assignment
S3
230 V output
3 x 1 mm²
Charging pump for hot water tank
S4
230 V output
3 x 1 mm²
External pump / solar pump
S5
230 V output
3 x 1 mm²
Heating circuit 2: heating circuit pump
S6
230 V output
4 x 1 mm²
Heating circuit 2: heating circuit mixing valve
S7
230 V output
3 x 1 mm²
Heating circuit 1: heating circuit pump
S8
230 V output
4 x 1 mm²
Heating circuit 1: heating circuit mixing valve
S9
230 V supply extension
3 x 1 mm²
to circuit board [MK-E]: terminal [S15]
S10
Potential-free output
(special function)
Circulation pump / burner
S500 T5
Temperature input
2 x 0.5 mm²
Outside temperature sensor
S500 T6
Temperature input
2 x 0.5 mm²
Collector
S501 T7
Temperature input
2 x 0.5 mm²
Hot water
S501 T8
Temperature input
2 x 0.5 mm²
Buffer temperature sensor 1 (top)
This temperature sensor is always
mounted at the top of the buffer. If, for
example, there are three temperature sen-
sors on the buffer, then buffer temperature
sensor 1 is at the top, buffer sensor 2 in the
middle and buffer sensor 3 at the bottom.
S501 T9
Temperature input
2 x 0.5 mm²
Buffer temperature sensor 2
S501 T10
Temperature input
2 x 0.5 mm²
Buffer temperature sensor 3
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