Siemens SIPLUS HCS Series Operating Instructions Manual page 92

Connecting
6.6 Connecting the heating elements and three-phase line supply
2-pin connection between phase and neutral conductor (230 V)
For 2-pin switching of the outputs, the loads must be switched via the power semiconductors
from two channels. This has the following advantage: In case of a cut-off of one of the two
main power semiconductors (short-circuit), operation is still possible or the load can be
turned off.
With this type of connection only channels 1 to 4 are used.
Figure 6-6
Please note the particularities of this type of connection regarding the following aspects:
● Configuration parameters (see Configuration parameters for CIM and POM (Page 108))
● Cyclic data (see Cyclic data exchange (Page 155))
● Measured values (see Acyclic input data (Page 169))
● Error messages (see Manufacturer-specific error codes (Page 175))
90
POM4220 Highend power outputs - 2-pin connection between phase and neutral
conductor
SIPLUS HCS4200 PROFINET/PROFIBUS DP
Operating Instructions, 07/2019, A5E35066204A/006