Integra 128-WRL + Elmes MTX – how to activate MTX with OC outputs?

How to connect Elmes MTX transmitter to the output of Integra 128-WRL control panel?

I connected the transmitter's power supply to OUT2 (high current) and COM. This works perfectly.

I have a problem with connecting the transmitter control inputs, as the signal is transmitted when +12V is connected to one of the two channels and the low current outputs short circuit to ground. Reversing the polarity is also of no use.

Please help.

What is this transmitter to work with, how did you program the low current outputs?

The controller will work with the Elmes STM. The pairing of the two also went without a problem.

The MTX has 5 cables:
1) black power supply - I connected in the control panel to COM
2) red power supply - I connected in the control unit to OUT2 (high current 12V)
3) red (C) - for triggering transmission on channel 1
4) blue (N) - for triggering transmission on channel 2
3) black (B) - used to short with those above to trigger transmission. Its what I used for pairing and testing.

Transmission can also be triggered without using B when 12V is applied to C or N and this is the route I went.

I connected C and N to the outputs on the control panel OUT3 and OUT4 (low current) respectively. Both are programmed with normal polarity, i.e.: active state - shorted to ground; inactive state - disconnected from ground.

In both cases the required 12V is not present so the transmission is not triggered.


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Out of date - already advised.

It turns out I have a panel expander with relay outputs where each has 3 leads: C, NO, NC. When the OUTx output is switched on - C is shorted to NO, and this solves my problem.