ISK 74 - ASO Safety

3. General
The ISK signal transmission s��stem solves the problem of connecting moveable sensors to a stationar��
evaluation s��stem without mechanical stress. Communication between the moveable sensors and
the electronic evaluation s��stem is based on induction. To achieve this, the monitoring electronics
induce a frequenc�� 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 frequenc�� and
sends corresponding feedback to the electronic evaluation s��stem in the event of cable break or
actuation of a sensor.
4. Function
The compact and eas��-to-install safet�� rela�� is designed for outdoor use and can be operated with
230 V mains voltage or 24 V AC/DC.
Up to four safet�� contact edge circuits can be connected to the switching unit. Two channels (SCE
opening movement and SCE closing movement) are available for the safet�� contact edges (SCE)
on the gate leaf; two channels are also available for the safet�� contact edges on the leading pillar.
The signal transmission s��stem monitors the travelling safet�� contact edges on the gate leaf without
contact and without abrasion. The stationar�� safet�� contact edges are connected directl�� to the
switching unit.
The switching unit continuousl�� monitors these four safet�� 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 safet�� contact edge circuit. A
terminating resistor is integrated into the end edge of the relevant safet�� 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 rela�� switching contacts open.
The switching states of the rela��s and the applied operating voltage are indicated b�� LEDs.
5. Proper use
The ISK 74 safet�� transmission s��stem is designed for evaluating stationar�� and travelling safet��
contact edges with constant 8.2 kW resistance.
An�� uses above and be��ond these uses constitute improper use. The manufacturer assumes no
liabilit�� for damages arising from improper use.
The device ma�� onl�� be used in special applications with the manufacturer’s express consent.
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