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QUOTE (frame69 @ 4 Feb 2009, 06:30) <{POST_SNAPBACK}>Thanks David, so in your opinion 16vs should do the job? I fitted a cdu because I was told it would protect my point motors (this is stuff which was bought before I joined this forum). I've learnt a lot since joining.

Yes, feed 16vAC into the CDU, it gives Peco motors a good kick & will protect motor & pushbutton/passing contact better than straight AC.
 

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QUOTE (RFS @ 4 Feb 2009, 09:05) <{POST_SNAPBACK}>Needs to be 16 volts AC and 3 amps to provide enough power. 1 amp transformers are not up to the job.

Yes, that is true if you are using the AC output straight to the point motor but then you take the risk of the passing contacts burning/arcing as the make/break has a 3-4 amp load & then sticking & burning out the motor. The arcing can be easily seen using stud & probe.

Always safer to use a CDU & in this case, the transformer can be a 1 amp unit as it is the CDU that provides the power very quickly.
At the instant the circuit between button/contact - CDU & motor is made, the transistor in the CDU is switched off so no power from the transformer is used at all. When the circuit is broken, the transistor then allows the capacitor/s in the CDU to re-charge very quickly.

Of course, one can always use a Masterswitch unit which is basicaslly a CDU per motor with other facilites/abilities.
 
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