2. Safety
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2.3 Safety during installation
Make sure that the mains voltage matches that on the nameplate of the
control prior to the connection!
An incorrect electrical connection can cause damage to the control and
to the connected systems!
When connecting the system components or the sensors, the control
must be disconnected from the mains voltage.
It is not allowed to connect any devices to the relay contacts whose
currents are above the maximum values specified in the technical data.
It is not allowed to connect any other devices to the power supply ter-
minals of the control.
To avoid personal injuries or a damage of the milk the following se-
quence of connections must be strictly observed!
Disconnect system from voltage and secure against unintentional restart.
Open the housing.
Connect all components and sensors to the terminal block according to the wiring
diagram.
Connect mains supply.
Lock the switch box and switch on the mains voltage.
Switch on and parameterize the control as described in section “Operation”.
(Possibly with the optionally available configuration Software WELBA-
KONSOFT).
2.4 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
physically 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.
WARNING
