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English (US)
7.3.2 Minimum connection, signal terminal
Operation is only possible when terminals 18 and 20 are
connected, for instance by means of an external on/off switch or a
short wire.
7.3.3 Connection of a thermistor (PTC) to the CUE
The connection of a thermistor (PTC) in a motor to the CUE
requires an external PTC relay.
The requirement is based on the fact that the thermistor in the
motor only has one layer of insulation to the windings.
The terminals in the CUE require two layers of insulation since
they are part of a PELV circuit.
A PELV circuit provides protection against electric shock.
Special connection requirements apply to this type of circuit.
The requirements are described in EN 61800-5-1.
In order to maintain PELV, all connections made to the control
terminals must be PELV. For example, the thermistor must have
reinforced or double insulation.
7.3.4 Access to signal terminals
All signal terminals are behind the terminal cover of the CUE
front. Remove the terminal cover as shown in figs 22 and 23.
Fig. 22 Access to signal terminals, A2 and A3
Fig. 23 Access to signal terminals, A4, A5, B1, B2, B3, B4, C1,
C2, C3 and C4
Fig. 24 Signal terminals (all enclosures)
TM03 9057 3207
TM03 9003 2807
TM03 9004 2807
TM03 9025 2807
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