Error Diagnosis; Error Correction - ASO Safety Solutions ISK 71-242 Manuel D'utilisation

10. Error diagnosis

Onl�� the green LED ma�� illuminate i� the suppl�� voltage has been correctl�� connected. I� one o� the red LEDs
illuminate, there is an error in the s��stem which can be pinpointed with the aid o� the LED.
LED
LEDs are not The suppl�� voltage is missing, too
illuminated low or has been connected incor-
rectl��
A single red LED Contact edge(s) not connected,
is illuminated connected incorrectl�� or �ault��
One o� the contact edge connections
is not being used
Both o� the red The transmission line is �ault�� or has
Transmit LEDs been installed incorrectl��
are illuminated
Contact edge(s) not connected,
connected incorrectl�� or �ault��
* I� the error is not in the wiring, the �unction o� the electronics can be tested b�� connecting an 8.2 kΩ
resistor to all SCE inputs on the ISK 71‑242 (ISK 71‑942) electronic evaluation s��stem (terminals 3, 10
and terminals 3, 11) and to the travelling coil core (connections O and C). I� the electronics work per�ectl��
after per�orming the test, the sa�et�� contact edges must be checked using an ohmmeter. To do this, the
respective connection on the SCE �or the electronic evaluation s��stem or �or the travelling coil core must
be disconnected and connected to an ohmmeter.
The resistance must be 8.2 kΩ ±500 Ω when the sa�et�� contact edge is inactive and must not exceed 500 Ω
when it is active.
** I� both o� the LEDs �or the travelling SCEs (Transmit Opening and Transmit Closing) illuminate, there is
an error in the inductive signal transmission s��stem. The most �requent causes o� these errors are bad
coil core connections, incorrectl�� installed cable s��stem components (see IKS sa�et�� transmission s��stem
assembl�� instructions) or an impermissibl�� low suppl�� voltage.
The maximum resistance value o� the cable loop must not exceed 3 Ω . The resistance value can be
measured b�� disconnecting the steel cable �rom the ground terminal and then measuring the resistance
between the end o� the steel cable and ground terminal.
Error
Check connections and suppl�� voltage:
‑ 24 V AC/DC at terminals 8 9
Tolerance range: ±10%
- Check the connections o� the corresponding
‑ Check sa�et�� contact edge(s)*
An�� contact edge connections that are not
being used must be permanentl�� bridged
using one o� the supplied 8.2 kΩ resistors
‑ Observe the mech. assembl�� instructions
‑ Check transmission coil cores �or abrasion.
‑ Check cable loop; make certain that both
‑ Check cable / gate lea� contact points.
‑ Check suppl�� voltage**
- Check the connections o� the corresponding
‑ Check sa�et�� contact edge(s)*

Error correction

contact edge (squeezed or brittle suppl��
lines, etc.)
(ISK sa�et�� transmission s��stem)
transmission coil cores are in the cable loop
contact edge (squeezed or brittle suppl��
lines, etc.)
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