Siemens SIPLUS HCS3200, Operating Instructions Manual

Page: 41 / 74

Functions
8.3 Line supply voltage monitoring
SIPLUS HCS3200
Operating Instructions, 07/2014, A5E31278506C/002
41
8.3 Line supply voltage monitoring
Line supply voltage monitoring
The heating controller is designed for operation in a TN system with 400 V AC. The
maximum permissible variation is ±10 %. The supply voltage is measured with a tolerance of
±0.5 % and the measured value is checked against the valid working range. The actual
voltage measurement is reported to the user (see section Cyclic input data (Page 45)).
If the voltage lies outside the permissible range, a warning will be generated (see section
Diagnostics data (Page 47)) and heater operation continues. It is the responsibility of the
user to respond.
Note
Due to the measuring principle, the voltage measuring range lies between 320 V and 480 V.
•
Voltages below this are indicated as 0 V.
• Voltages above this are indicated as the full-scale value.
The full-scale value can vary between devices by a tolerance of 1 %.
If the voltage lies outside the measuring range, an error message will be generated (see
section Diagnostics data (Page 47)) and heater operation stops. Heating can only be
switched on again when the voltage has returned to the measuring range.
NOTICE
Excessive voltages can damage the device
It is the responsibility of the user to ensure compliance with the maximum voltage limits.