In regards to your question, the outputs on the NX driver are open collector type outputs. Therefore, the output will require a voltage supplied to it. The NX driver can accept 30 VDC or less and the amperage must be limited to 10 mA or less
. Therefore, you will need to connect a resistor in series with the power supply to ensure that the current is limited to 10 mA or less.
Using the equation: V=IR, you can determine the resistance value needed, which will depend on the voltage that is being supplied.
For example, a 24 VDC power supply would require a 2.4k ohm
resistor (R = 24 volts / 0.01 Amps = 2400 ohms).
Another forum depicts the wiring of a similar alarm output on our BX driver. Although the product is different, the output wiring is similar. You can reference the information from the previous forum using the link below:viewtopic.php?t=646NOTE:
The PLC section can be redefined as the LED.
Also, the alarm output is a normally closed output. Therefore, when there is no alarm, the LED will be turned on. However, when an alarm generates, the LED will be turned off.
With the alarm removed, are you able to measure the voltage? With the alarm off, you should read closer to 24 VDC.