General Information And Functional Description; Proper Use - ASO Safety Solutions ELMON inductive 77 Manuel D'utilisation

3. General information and functional description

The ELMON inductive signal transmission system sol-
ves the problem of connecting moveable sensors to a stationary
evaluation system without mechanical stress. Communication between the moveable sensors and the
electronic evaluation system is based on induction. To achieve this, the monitoring electronics induce a
frequency on a coil core, which is integrated in a closed conductor loop.
The second coil core, to which the moveable sensors are connected, receives this frequency and sends
corresponding feedback to the electronic evaluation system in the event of cable break or actuation of a
sensor.
The ELMON inductive 77 / SPK 77 switching unit is used for evaluating safety contact edges for safeguarding
locations where there is a risk of crushing and cutting.
The switching unit is designed and type-approved in accordance with EN ISO 13849 "Safety-related parts of
control systems" for Performance Level d. To meet the Performance Level, the switching unit has a redun-
dant design with two independent semiconductor switches; the ability of these switches to switch off
is constantly tested.
Monitoring of the standby current is made possible by an integrated terminating resistor in the sensors. If
the specified standby current is flowing, a voltage is output at the respective outputs. If the sensor is actuated
or the sensor circuit is interrupted, the voltage is switched off at the respective outputs.
The monitoring state of the sensors and the applied operating voltage are indicated by LEDs.
During troubleshooting after actuation / failure of the sensor or after a power failure, the switching unit
automatically re-enables the control circuits with a delay time.
If an error is present, all the safety outputs are not active.

4. Proper use

The switching unit is intended to be used as protection in combination with safety contact edges with inte-
grated 8.2 KΩ resistor for standby-current monitoring on a gate system.
Any uses above and beyond these uses constitute improper use. The manufacturer assumes no liability for
damages arising from improper use.
The ELMON inductive 77 / SPK 77 switching unit can only fulfil its safety-related task if used properly.
The device may only be used in special applications with the manufacturer's express consent.
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