Error Diagnosis; Error Correction - ASO Safety Solutions ELMON inducti ve 74-312 Manuel D'utilisation

Inductive signal transmission system

8 Error diagnosis

Only the green LED may illuminate if the supply voltage has been correctly connected If one of the
red LEDs illuminate, there is an error in the system which can be pinpointed with the aid of the LED
LED
LEDs are not The supply voltage is missing, too
illuminated low or has been connected incor-
rectly
A single red LED Contact edge(s) not connected,
is illuminated connected incorrectly or faulty
One of the contact edge connections
is not being used
Both of the red The transmission line is faulty or has
Transmit LEDs
been installed incorrectly
are illuminated
Contact edge(s) not connected,
connected incorrectly or faulty
* If the error is not related to the system's wiring, the proper function of the electronics can be
tested by connecting an 82 kΩ resistor to each of the SCE inputs on the ELMON inductive 74-312
electronic evaluation system (terminals Stationary Opening or Closing) and to the travelling coil core
(connections O and C) If the electronics work perfectly after performing the test, the safety contact
edges must be checked using an ohmmeter To do this, the respective connection on the SCE for the
electronic evaluation system or for the travelling coil core must be disconnected and connected to an
ohmmeter
The resistance must be 82 kΩ ±500 Ω when the safety contact edge is inactive and must not exceed
500 Ω when it is active
** If both of the LEDs for the travelling SCEs (Transmit Opening and Transmit Closing) illuminate, there
is an error in the inductive signal transmission system The most frequent causes of these errors
are bad coil core connections, incorrectly installed cable system components (see ELMON inductive
signal transmission system assembly instructions) or an impermissibly low supply voltage
The maximum resistance value of the cable loop must not exceed 3 Ω The resistance value can
be measured by disconnecting the steel cable from the ground terminal and then measuring the
resistance between the end of the steel cable and ground terminal
20
Error
Check connections and supply voltage:
- 24 V AC/DC at terminal 24 V AC/DC or
- 230 V AC at terminals L1 and N
Tolerance range: ±10%
- Check the connections of the corresponding
- Check safety contact edge(s)*
Any contact edge connections that are not
being used must be permanently bridged
using one of the supplied 82 kΩ resistors
- Observe the mech assembly instructions
- Check transmission coil cores for abrasion
- Check cable loop; make certain that both
- Check cable / gate leaf contact points
- Check supply voltage**
- Check the connections of the corresponding
- Check safety contact edge(s)*

Error correction

contact edge (squeezed or brittle supply
lines, etc)
(ELMON inductive signal transmission
system)
transmission coil cores are in the cable loop
contact edge (squeezed or brittle supply
lines, etc)