Kübler SMC1.3, Safety Manual

Page: 134 / 235

R60047.0002 - Index 2 EN – page 14 / 115
5.2 Encoder Supply
The unit offers an auxiliary voltage output for separate supply of the encoders or sensors
in use. The encoder supply must be taken directly from the safety monitor, or via relay
contact when using an indirect power supply.
Terminals for encoder supply (24V or 5V) with optional voltage monitoring
The maximum load of the encoder supply is 200 mA per channel (Sensor 1 and Sensor
2). An encoder supply is available for each sensor channel (24V out or 5V out). The
voltage of the 24V Out encoder supply is approx. 2 V below the supply voltage of the
device supplied to [X3] (18... 30 VDC). Via the connection PWR sense, the voltage of the
encoder supply can be monitored (optional).
When powering up the encoder supply, the maximum input current of the safety unit
could be exceeded, depending on the encoders in use. In this case, the encoder supply
would not be enabled and an error appears.
In case of such problems, or if another voltage level is required, the encoder supply can
be switched on from an external voltage source via remote relay. In this case, it is
mandatory to energize the relay from the internal encoder supply of the SMCX unit.
•
In case of a direct encoder supply it is mandatory to operate the
encoders with the auxiliary voltage from the unit.
•
Indirect encoder supply must in any case be carried out via relay,
energized by the auxiliary voltage of the SMCX unit.