P3-IF4 Ship’s Whistle PAGA Interface


  • Simple Interface to Host PA/GA
  • Rapid installation
  • LED status display indication


The IF4 is a DIN rail mount robust module designed to locate in a central Public Address and General Alarm PA/GA MDF.

The IF4 is designed to control an external ship’s whistle in synchronisation with PA/GA system alarm tone cadence broadcast. The interface is implemented by a volt/earth free normally open contact which is extended from the IF4 to the ship’s whistle control panel.

The IF4 interface contact is rated at DC 24 V 0.25 A non-inductive form „A”. (normally open) and changes state in synchronisation with the broadcast alarm tone.

The IF4 is connected to the 2IP interface port and broadcast 70/100 V line
to source the PA/GA alarm tone cadence and to determine “alarm initiated” status.
Ship Whistle output enable is conditional on the presence of

  1. “Alarm initiated” contact closed
  2. Alarm drive audio output.

Technical Data

Dimensions483 mm x 44.5 mm x 150 mm
(19.02 inch x 1.75 inch x 6.30 inch)
(19″ rack mount)
Weight0.5 kg (1.1 lbs)
VoltageSupply Input: DC 48 V from host VX/AT-M switch
Current50 mA
ConnectionInput 1: Alarm synchronisation 70/100 V loudspeaker line.
Load to line is 0.5 W
Input 2: Alarm activated – normally open contact closes during PA/GA alarm tone broadcast
Output to Ships Whistle:
Normally open contact, closes when alarm tone broadcast. Rated DC 24 V, 0.25 A earth/volt free

*Refer to the documentation for more detailed information


Ambient temperature

0 °C to +50 °C (+32 °F to +122 °F)



Data Sheet – P3-IF4 Ship’s Whistle PAGA Interface