This proximity switch assembly TLS2FNB-9-AP is a PNP equivalent, Normally Open, and sourcing type switch, which replaces TL-S2FN-B-9 on some machines with Fanuc 11T and newer controls.
In case you could not get the correct result described above, please disconnect the load at terminal-b and re-test. If you can get the correct result without load, it means that the switch is good and troubleshooting by a service professional on the receiver circuit may be needed.
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A simplified connection and mounting diagram is:
For connection as a replacement, see the table below:
|Signals||New switches||Old switches|
Use a ferrous object to trigger the switch after it is connected and powered on; and then measure the output voltage, Vo, as shown. You should get the following result:
- When it is not being triggered, its LED should be off and Vo has no voltage.
If needed, you may connect a 2K resistor between terminal b and c.
- When it is being triggered, its LED should be on and Vo is about 12—24V DC.
In case you could not get the correct result described above, please disconnect the load and test again. If you can get the correct result without load, the conclusion is that the switch is good and the receiving circuit of your control system is fault.