4. Electrical connection
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– WTS-300-E - V4.1 - 20.01.2022
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4.3 Wiring
Correct wiring in accordance with the information in the accompanying description
and local regulations is essential. Take particular care to ensure that the AC supply
is not connected to the sensor input or other low-voltage inputs or outputs.
The various relay contacts may only be connected with uniform tension.
Use copper wire (except for the sensor connection) and ensure that all supply leads
and connection terminals are dimensioned to suit the relevant current rating.
When connecting the controller and selecting the wiring materials to be used, it is
essential to comply with the provisions of DIN VDE 0100 “Erection of power instal-
lations with rated voltages below 1000” or the relevant national regulations.
Furthermore, all connections must comply with the relevant VDE regulations or cor-
responding national regulations.
- Within the two relay groups (K3 to K6) and (K9 to K12), the respective relays
are connected with each other on one side. They connect the respective volt-
age which has been connected at the feed point (terminals 8 and 17) to the
load.
- Compressor, cleaning pump and heater must not be connected directly to the
relays on the control unit. These must be switched by additional contactors. In
individual cases, it must be checked whether additional motor protection
switches or other safety devices are to be installed.
- Contactors are to be fitted with an RC protective circuit.
- Connection of the digital inputs:
- Only the output signal of the control provided at terminal 38 must be connected
to the digital inputs (via potential-free switching contacts)!
