MGL Avionics User Forum

Posted: **Tue Oct 25, 2022 11:19 pm**

The RPM-2 instructions state the alarm wire is an “open collector switch to ground”. Does this mean the light I attach should have a separate power source and the RPM-2 provides the ground when activated or does the RPM-2 provide the power to the light?

Posted: **Wed Oct 26, 2022 5:10 pm**

Connect the lamp to an external supply and the RPM-2 will provide the ground when in alarm.

Posted: **Wed Oct 26, 2022 5:23 pm**

Thanks

MGL Avionics User Forum

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