PR7400 PAGING OVERRIDING MODULE
PR7400 is a new addition to VC / VP category, which is a module for providing a relay contact whenever a paging is in progress, as well as converting the 100V line paging audio to line level, all in a box.
The available functions of the unit shall be :
NO and NC relay of 1A contact allows local BGM source overriding, bypass local volume controller to allow central paging to pass through. This is useful during essential paging and whenever 24V DC overriding signal is not available in the cabling works.
100V - Line audio converter
When it is required that the central paging to be broadcasted to local speakers utilising the local amplifier / system, it provides an audio conversion with balanced line audio.
Firmware / Software
Last updated : N/A
Version : N/A
Suggested Installations :
- Boutiques / restaurants
- Function rooms
- Remote buildings linked with 100V without
24V DC overriding signal
- Classrooms etc with volume controllers
Power requirement :
Voltage 24 DC via local adapter
Consumption 2.1W ( standby )
2.5W ( operating )
Paging input 50 / 70 / 100V line
Sensitivity threshold 5 - 80V rms
Detection frequency 80 - 5 KHz
Relay NC and NO ( DPDT )
Relay contact 1A @ 24V DC
Paging load / rating 100mW @ 100V
Trigger duration 5 - 18 seconds
Audio output line balanced
Output level Mute - 0 dB
Freq response 20-20 KHz +/- 3dB
Isolation to 100V 37.5dB
Indicators Power, Relay trigger, Audio
Connections Detachable Phoenic
Dimensions (mm) 50 X 147 X 40 WHD
Weight 200g ( est )
Output side of PR7400
DPDT with NC and NO relay for different output configurations
100V to Line audio conversion
Adjustable detection sensitivity, relay trigger duration
Adjustable line output volume
Suitable for remote overriding for installations without 24V DC VC overriding cable
Modular for flexible placement of unit such as in cabinets, risers, etc
Certain zones, such as retail units, restaurants, theaters are normally free from normal paging of central system, and they would have own localized BGM or simple PA.
Only essential paging would pass through the localized speakers. As such, PR7400 would be employed to provide overriding of local volume controller ( if available ) and inserting line audio to the mixer.
In this example, audio to the speakers is powered from local amplifier.
In this setup, central paging shall power the local speakers, regardless whether the local amplifier is turned on or off. This shall be a preferred setup and useful for emergency paging.
It is important to consider the load of local speakers and provide adequate power rating of amplifiers at central rack.