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4
Installation and maintenance
Installation precautions
The unit must first attach to the M20 connector before the safety loops are connected to the sensor.
Warning! All the safety functions must be tested before starting up the system.
Maintenance
Warning!
The safety functions and the mechanics shall be tested regularly, at least once every year to confirm that all the
safety functions are working properly (EN 62061:2005).
In case of breakdown or damage to the product, contact the nearest ABB/Jokab Safety Service Office or reseller.
Do not try to repair the product yourself since it may accidentally cause permanent damage to the product,
impairing the safety of the device which in turn could lead to serious injury to personnel.
Testing of the safety functions
Make sure the safety unit is working properly by following these steps:
Interrupt the dynamic safety circuit before this unit. The LED should flash between green and red.
Interrupt protection. The LED should light red.
The LED should light green when protection is OK and if the safety circuit(s) before this unit is not
interrupted.
Troubleshooting
LED indication
Lights red
No lights
Lights green (but no dynamic output
detected)
Weak lights or red and green lights at the
same time
NB: Tina 1A can be used instead of this unit to check if the safety circuit is OK (only for test).
Warning! Replace defected unit with a new one and never bypass the safety circuit using Tina 1A or any other
solution.
2TLC172125M0201, rev. A
2011-09-20
Expected causes of faults
Sensor pushed/opened
Bad connection between loops (green and/or
orange) and sensor terminals
24 VDC input to pin-2 (no dynamic signal)
Loss of power supply
Defected dynamic signal input to unit
(asymmetric pulses)
The unit is defect
9
Checking and measures to take
Check status of the sensor
Check terminals and fasten them carefully
Check if there is 24 VDC to input (pin-2). If
Yes, check cable or unit before and fix it.
Check 24 VDC / 0 VDC power supply
Check the dynamic input or the unit before
The unit needs to be replaced. Contact
ABB/Jokab Safety.
www.abb.com/lowvoltage
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