OPERATING INSTRUCTIONS AND DATA SHEET
FOR SAFETY CONTROLLER REA3
Safety switch REA3,""""" "" Date: 17.08.2017,"""" " """""""""""""Page 10 of 12
Variotech GmbH, Gewerbeweg 5, 2230 Gänserndorf, Tel +43 2282 60310, http://variotech.com
Magnetic switch error functional test:
A check takes place to determine whether a defective magnetic switch is recognised.
Error possibility 1:
A magnetic switch also remains open if magnetic tape is present.
The test must be initiated with the cabin door closed.
Terminal 2 must be cleared to test Magnetic switch 1 (MS1) by removing the conductor from the
terminal. Alternatively, but not simultaneously, Magnetic switch 2 (MS2) can also be tested; for this
purpose, Terminal 4 must be cleared by removing the conductor from the terminal.
Then a travel command is issued. The safety circuit must deactivate at the end of travel when the
cabin door opens.
Error possibility 2:
A magnetic switch also remains closed if no magnetic tape is present.
The test must be initiated with the cabin door closed.
For the test of Magnetic switch 1, Terminal 1 must be connected to Terminal 2 (MS1) by establishing a
conductor connection (wire bridge). Alternatively, but not simultaneously, Magnetic switch 2 (MS2) can
also be tested; for this purpose, Terminal 3 must be connected to Terminal 4 by establishing a
conductor connection (wire bridge).
Then a travel command is issued. The safety circuit must deactivate at the end of travel when the
cabin door opens.
Testing general device functions:
A test for correct function is carried out by pressing the TEST button:
• Redundant (double execution) encoders and sensors for safety functions are subject to testing for
plausibility in the REA3 safety switch.
The functional test is carried out for all possible combinations of the two encoders. If a plausibility
error occurs, the safety switch deactivates automatically.
• The outputs (safety relay) of the safety switch carry out a functional test with each status change
and each time the TEST button is pressed.
Errors when switching the safety relay cause deactivation.
• An error on the periphery wiring causes deactivation.
• A defective magnetic switch, which remains in an activated state or in a deactivate state,
regardless of the magnetic tape, is recognised as defective and causes deactivation.
• Errors in the supply voltage, circuit board errors and other errors cause deactivation.
• The testing of the device function was successful if the “OK” LED illuminates after the test.
Troubleshooting:
• Check both fuses. The maximum current is 2A (terminals 11/12 - 13/14).
Note: Use only glass tube fuses”5mm x 20mm, 250V, 2A flink”.
• Check the magnetic tape/magnetic switches at each stop.
The green “MS1” and “MS2” LEDs indicate the function.
• Check the suitable safety circuit voltage in the range of 48V to 230V AC:
The “SK” LED must illuminate when voltage is connected.
• If the green “ON” LED does not illuminate: Test the supply voltage (24V) and the reset button.
• If the green “OK” LED does not illuminate: Reset the error with the reset button.
• If no green LED illuminates with connection of the supply voltage, the test button should be
checked to determine whether it is blocked.
• If the red LED blinks, the recorded error can be deleted by pressing the external reset button and
