General; Function; Proper Use - ASO Safety Solutions ISK 71-24 Manuel D'utilisation

3. General

The ISK signal transmission system solves 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.

4. Function

The compact and easy‑to‑install safety relay is designed for use in switching cabinets where a 24 V
supply voltage is available.
Up to four safety contact edge circuits can be connected to the switching unit. Two channels (SCE
opening movement and SCE closing movement) are available for the safety contact edges (SCE)
on the gate leaf; two channels are also available for the safety contact edges on the leading pillar.
The signal transmission system monitors the travelling safety contact edges on the gate leaf without
contact and without abrasion. The stationary safety contact edges are connected directly to the
switching unit.
The switching unit continuously monitors these four safety contact edge circuits for actuation or
interruption (cable break). In the event of a fault, one of the two stop commands (stop in the opening
direction or stop in the closing direction) is issued to the respective safety contact edge circuit. A
terminating resistor is integrated into the end edge of the relevant safety contact edge circuit in order
to enable the standby current of the entire system to be monitored. If the specified standby current
is flowing, the output relays are activated and the switching contacts are closed. If the switching
element is actuated or the sensor circuit is interrupted, the relay switching contacts open.
The switching states of the relays and the applied operating voltage are indicated by LEDs.

5. Proper use

The ISK 71‑24 safety transmission system is designed for evaluating stationary and travelling safety
contact edges with constant 8.2 kW resistance.
Any uses above and beyond these uses constitute improper use. The manufacturer assumes no
liability for damages arising from improper use.
The device may only be used in special applications with the manufacturer's express consent.
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