eta ePE-K 140, Installation Manual, Page: 66 / 84

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Circuit board GM-C3 Electrical connections
10.6 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
Default assignment
S2 230 V output 3 x 1 mm²
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
Switching unit, see graphic
Fig. 10-9: "Con-
necting the switch unit"
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 T1 Temperature input 2 x 0.5 mm²
S500 T2 Temperature input 2 x 0.5 mm²
S500 T3 Temperature input 2 x 0.5 mm²
S500 T4 Temperature input 2 x 0.5 mm²
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