General And Function; Proper Use - ASO Safety Solutions ISK 74-312 Manuel D'utilisation

3. General and Function

The ISK signal transmission s��stem solves the problem of connecting moveable sensors to a stationar�� evalua-
tion 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 cor-
responding feedback to the electronic evaluation s��stem in the event of cable break or actuation of a sensor.
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 integra-
ted into the end edge of the relevant safet�� contact edge circuit in order to enable the standb�� current of the
entire s��stem to be monitored. If the specified standb�� current is flowing, the output rela��s 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.

4. Proper use

The ISK 74-312 switching unit can onl�� fulfil its safet��-related task if used properl��.
The ISK 74-312 safet�� transmission s��stem is designed for evaluating stationar�� and travelling safet�� contact
edges with constant 8.2 kΩ 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.
15