Electrical Installation; Operative Earth; System Power Supply - Kendrion Kuhnke Vico 404 User Manual

Kendrion Kuhnke Automation GmbH

5.2 Electrical Installation

The connectors are located on the back of Kuhnke Vico or as described in section Connectors of Kuhnke
Vico.
Proceed in the order below to wire up the unit:
 turn off the unit,
 unplug the unit from the mains/power supply,
 attach all cables to the unit and any peripherals,
 check that all cables are firmly attached at both (female and male) ends,
 reconnect all units with the mains/power supply.

5.2.1 Operative Earth

Operative earth is not a safeguard but a means of improving the immunity to noise. It is solely intended to
dissipate noise current but not to protect persons from contact.
It connects through a power supply connector.
Take heed of the following points to ensure that noise currents are safely dissipated:

Try to keep a very short distance between the unit and the central earth bonding point on the control
cabinet.

Check that the cable/earth conductor diameter is 1.5 mm² or greater.

Take heed of the specified conductor shielding; check that all data link cables attached to the unit
have shielded wires and attach to the unit's earthing terminals.
Information
Earth wires should be short and have a large surface (copper mesh). Refer to
http://de.wikipedia.org/wiki/ground_(electronics)or a similar source for further details.

5.2.2 System power supply

Power is supplied to Kuhnke Vico through pins 24V and 0V of connector "24V 0V
may be potential-free or earthed. The wires should have a cross section of 1.5 mm
connector sleeve. Attach the connector sleeves to the wires, then insert the wires in the terminal chamber
and tighten the screw terminal to 0.5 Nm.
Check the pin wiring specified for the unit's power supply connector when wiring up the unit.
CAUTION
Damage to the unit due to supplying excessive or the wrong power
Wrong voltage or wrong polarity of the connectors may destroy the unit.
 Please refer to the pin wiring shown on the unit.
 Refer to the Instruction Manual
NOTE
If you opted for a potential-free wiring, please note that, on the panel, the internal power
supply connection to earth goes through a 1 MΩ resistor connected in parallel with a 4.7
nF capacitor.
Kuhnke Vico (E 854 DE)
28-03-2019
Construction and Functionality
". The power supply
2 2
to 2.5 mm and a
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