EUCHNER MGB (V2.0.0) - Manual (Page 9)

MGB Help for Setup and Service
 All connections are correct, but there is no common potential for the series-connected devices (several
power supply units for one chain)
 In case of series operation, an upstream unit is set as an AP unit.
Remedy:
1. Check the wiring and correct it or switch the clock pulses off
or check the upstream devices for incorrect DIP switch configuration.
2. Switch the voltage off at all devices
or
press the reset button (if present) that controls ALL integrated reset inputs in the series connection
3. Close the door(s).
4. Switch the voltage on again
or
release the reset button
5. Wait until the STATE LED flashes with the code “LONG ON, SHORT OFF”.
 The MGBs are now ready for operation again
3.5 LED DIA illuminated + LED STATE flashes 3 time (AR and AP modes)
Fault symptom:
The MGB displays the fault state “handle module read error (e.g. error in code/code not readable)”.
Possible fault causes:
 EMC interference, e.g. caused by clocked cables near the MGB.
 Hardware fault in the handle module
 Different potentials at the fence and door, causing compensating currents that could lead to this error
message.
Remedy (in case of EMC interference or potential differences):
1. Check the area of use with regard to increased EMC radiation or lack of grounding connections of the
protective enclosure.
2. Switch the voltage off at all devices
or
press the reset button (if present) that controls ALL integrated reset inputs in the series connection
3. Switch the voltage on again
or
release the reset button
4. Wait until the STATE LED flashes with the code “LONG OFF, SHORT ON”.
 The MGBs are now ready for operation again
Remedy (hardware fault in the handle module):
1. Replace the handle module and repeat the teach-in operation. Observe the instructions for “Teaching in a
handle module” in the system manual for this purpose. Tip: Close the door and activate guard locking to
avoid interruptions during teach-in operation.
115218-01-03/12 Subject to technical modifications Page 9/14