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Problem 1 is, like an
The PTD1640U output is 16 volts AC (alternating current) so there is no polarity to the wires. You can hook either wire to either terminal on the wall transformer.
on Mar 03, 2017
The dsc ptd1640u transformer came
Check the Output specifications on the transformer in question and note the power output or 'Secondary' format. If it is listed as 'VAC', then the transformer can be wired either direction, as it provides a low voltage ( 16.5 VAC ) alternating current power source for the alarm panel. If it provides 'DAC', polarity WILL matter and you may have to have a professional check your installation.
on Mar 08, 2011
Could you maybe look for a brand and model on the system? Either on the keypad or on the system box (metal panel somewhere in the house)?
Then maybe Google the brand and model, looking for a manual?
on May 20, 2017
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