Bosch Plena End-Of-Line Supervision Board PLN-1EOL

Product Description

• A Plena end-of-line board is a PCB designed to detect the 20 kHz pilot tone generated by a supervised public address or voice alarm system

• It activates a voltage free switch in the presence of a 20 kHz signal (pilot tone) above 5 V,as well as an LED for easy visual confirmation of operation

• Pilot tone detection on 100V loudspeaker lines

• Voltage free switch 200V 1A and LED indications of pilot tone

• Daisy chainable for monitoring multiple zones on a single input contact

• Fits on built-in mounts on selected Bosch loudspeakers

• EN 54-16 certified

• Functions

• Plena end-of-line boards monitor the presence of a pilot tone on a loudspeaker line

• The board connects at the end of a loudspeaker line and detects the 20 kHz pilot tone signal

• This signal is always present on the line:when back ground music (BGM) is playing,when a call is in progress,and when no signal is present

• The 20 kHz tone is inaudible and at a very low level (-20dB)

• When the pilot tone signal is present,an LED lights up,and a contact on the board is closed

• When the pilot tone fails,the contact opens,and the LED goes off

• If mounted at the end of the loudspeaker line,this applies to the integrity of the whole line

• Presence of the pilot tone signal does not depend on the number of loudspeakers on the line,the load on the line,or the line capacitance

• The contact can be connected to a PA system,such as the Bosch Voice Alarm System,to detect and report faults on a loudspeaker line

• Several EOL boards can be daisy-chained to a single fault input

• This allows a loudspeaker line with several branches to be monitored

• Since the background music also includes a 20 kHz pilot tone signal,there is no need to interrupt background music

Product Specification

Other Details