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TRIGGER and TAMPER PROTOCOLS
A Range Bell Boxes to suite residential and commercial installations.
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Ventcroft offers a range sounders have been designed to suite all markets. With six dedicated Trigger / Tamper Protocol option.
  nt uk ukx st  gt ntp

 

nt
Terminal Description
Sounder Trigger:   Requires NEGATIVE applied signal to the "TRG" (trigger) input
Strobe Trigger: Requires NEGATIVE applied signal to trigger the strobe
Tamper Return: With switch closed applies a NEGATIVE to the "RTN"  terminal, if "hold-off" negative is removed the return signal will also be removed along with the sounder self activating.

 

uk
Sounder Trigger:   Requires NEGATIVE applied signal to the "TRG" (trigger) input
Strobe Trigger: Requires NEGATIVE applied signal to trigger the strobe
Tamper Return: With switch closed applies a NEGATIVE to the "RTN"  terminal, if "hold-off" negative or positive is removed the return signal will also be removed.
Sounder Trigger Monitor Cut Link to enable, place 1K resistor in panel between Hold Off + and Negative Trigger

 

ukx
Sounder Trigger:   Requires NEGATIVE applied signal to the "TRG" (trigger) input
Strobe Trigger: Requires NEGATIVE applied signal to trigger the strobe
Tamper Return: With switch closed applies a NEGATIVE to the "RTN"  terminal, if "hold-off" negative or positive is removed the return signal will also be removed.
Sounder Trigger Monitor Cut Link to enable, place 1K resistor in panel between Hold Off + and Negative Trigger

 

ntp
Sounder Trigger:   Requires NEGATIVE applied signal to the "TRG" (trigger) input
Strobe Trigger: Requires NEGATIVE applied signal to trigger the Strobe - input
Tamper Return: With switch closed applies a NEGATIVE to tWith switch closed applies a positive  via a 1K resister to the "TRG" input  terminal which is removed when the switch is opened or "hold-off" positive or negative is removedhe "RTN"  terminal, if "hold-off" negative or positive is removed the return signal will also be removed.

 

ST
Sounder Trigger:   Requires NEGATIVE applied signal to the "TRG" (trigger) input
Strobe Trigger: Requires NEGATIVE applied signal to trigger the Strobe - input
Tamper Return: With switch closed applies a NEGATIVE to tWith switch closed applies a positive  via a 1K resister to the "TRG" input  terminal which is removed when the switch is opened or "hold-off" positive or negative is removed from the "RTN"  terminal, if "hold-off" negative or positive is removed the return signal will also be removed.

 

GT
Sounder Trigger:   Has selectable  Positive or NEGATIVE applied signal to the "TRG" (trigger) input.
Strobe Trigger: Has independent Positive and negative input terminals
Tamper Return: With switch closed applies a NEGATIVE to tWith switch closed applies a positive  via a 1K resister to the "TRG" input  terminal which is removed when the switch is opened or "hold-off" positive or negative is removed he "RTN"  terminal, if "hold-off" negative or positive is removed the return signal will also be removed.

 

 
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