Hi. Hubby is trying to fix a bell box. Can anyone tell me what these mean please and what type of circuit they would be on? RTN and TRG. Thanks.
Bell box symbols
- Thread starter sooty4
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RTN is generally tamper return. TRG is trigger the former is a continuation of the negative feed through the bell tamper back to the control panel. The latter is usually a switched negative fed from the control panel which activates the bell. More info is required for a definitive answer e.g make and model of bell and control panel
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