Vista 32fb and 4204CF

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  #1  
Old 07-09-20, 02:24 AM
J
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Vista 32fb and 4204CF

Hello,

Iím trying to have the 4204CF activate a zone on another system. I want the wire supervised so I figured the 4204CF would be the best choice. When I connect it to the zone terminals, the 32fb system goes into a ground fault because the + and - of what itís expecting to be a NAC device are shorted. Is there a way around this? I was thinking another stand-alone relay module that would activate when the NAC power is applied from the 4204CF, but the wiring from the second relay to the zone terminals would not be supervised by the 32fb system.

Thanks,
Jason
 
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Old 07-10-20, 12:16 PM
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As far as I can see...... the 4204CF is a 4 relay polarity reversing board for notification circuits like horns and strobes. This keep voltage on those wires that is being seen by your monitoring panel.

Technically you needed just the 4204 relay board.

Now.... if you already have the 4204CF and must use it...... you will need to send that output to a 12vDC relay with a diode in series with the relay coil. This way..... that relay will only activate when the polarity is reversed. You would connect the C and N.O. contacts of the relay to your monitoring panel. You can put an EOL resistor on the relay if needed.



 
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Old 07-10-20, 12:26 PM
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Thanks. I have several 4204s but they do not supervise the wire. What youíre describing as a workaround is the only thing I can think of as well. Using another relay that the 4204CF will apply and drop power to in order to activate the relay; the only issue with this is that the wire from that relay to the next-in-line contacts, is not supervised. Basically, Iím looking for a supervised 4204, and the 4204CF seemed like the only option.

Jason
 
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Old 07-10-20, 10:01 PM
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Put the EOL resistor on the relay contacts where the wiring connects to go to the panel.
That will supervise the wiring to the relay.
 
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Old 07-11-20, 05:39 AM
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Thanks again for the reply. The device contacts do not support a resistor, itís a cellular communicator. The communicator has a NO input that Iím connecting to. Iím guessing my only option is to mount that second relay in the same enclosure as the transmitter where the wires have a less chance of becoming damaged or disconnected, but I donít like that they wonít be supervised.
 
  #6  
Old 07-11-20, 08:15 AM
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Make the wiring "self supervising" by powering the relay coil in the NORMAL condition. When the 4204 output goies into alarm, it removes power to the relay coil creating an alarm for the communicator input.
 
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Old 07-12-20, 11:01 AM
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You use the EOL for the zone input you are connecting to. You would be supervising the wiring using the system you are trying to connect to.
 
 

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