2. Safety
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2.3 Wiring, screening, earthing
When selecting wiring materials and installing and connecting the temperature con-
troller to the electricity
supply, account must be taken of DIN VDE 0100 “Erection of
power installations with rated voltages below 1000” or the relevant national regula-
tions (e.g. based on IEC 60364).
- Wherever possible, keep input, output and supply leads and sensor cable phys-
ically separate from each other and do not lay them parallel to each other.
- Mains voltage cables and low-voltage cables must not be laid in one cable.
- Use screened and twisted interface and sensor cables.
- Earth the screening of temperature sensors unilaterally in the switchbox.
- Ensure correctly wired potential equalisation.
2.4 Electrical safety
- The regulator itself and the associated control circuits and load circuits must be
protected separately and in accordance with the local regulations.
- The separate protection of the control- and load circuit must be carried out ac-
cording to local conditions!
- In order to prevent destruction of the relay or semiconductor relay outputs in
the event of a short-circuit, the load circuit should be fused to the maximum
permissible output current.
- As well as incorrect installation, wrong parameter settings can also adversely
affect the correct functioning of the controller. For this reason, safety devices
that are independent of the controller should always be used, e.g. high and low
pressure valves or temperature limiters. Account should be taken of the local
safety regulations in this connection.
- The load circuit (relay outputs K1 to K12) must be fused in accordance with the
connected components.
- The connection of external voltages to the digital inputs can lead to the destruc-
tion of the control.
- Caution: All cables to the digital inputs must be shielded and kept as short as
possible. EMC.
