Siemens SIPLUS HCS Series Operating Instructions Manual page 94

Connecting
6.6 Connecting the heating elements and three-phase line supply
Economy circuit
With an economy circuit, a 3-pole star load is connected as shown in the block diagram.
Requirements:
● The three resistance values of the star load must be identical.
● Only loads with low temperature coefficients may be used. Radiators with tungsten
heating coils, for example, are not permitted.
With this type of connection only channels 1 to 4 are used.
Note
A three-pin triangular load cannot be operated on the POM4220 Highend.
Figure 6-8 Power outputs POM4220 Highend - Economy circuit
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))
92
SIPLUS HCS4200 PROFINET/PROFIBUS DP
Operating Instructions, 07/2019, A5E35066204A/006