TC8200 Loop monitor technology

The system is built with an IO zone C-board and a maximum of four IO PCB-B boards. The PCB-B board can power 60 isolators in a speaker line and controls the signal path in two ways: from left to right and vice versa. The IO PCB-B board has  its own on-board power supply to power the loop.

A block of four outputs of the voice alarm system is connected to the A-B loop monitor. The loop monitor has a total of 5 PCB’s:

• One IO zone PCB zone C which is a cable interface
• Four IO zone PCB-B PCB’s which is the loop detector (four loops)

In the architecture there is always a block of four zone output devices connected to the A-B loop monitor device. The PCB-B has got four connections:

• A1 and A4 as outgoing to the first loudspeaker in the loop;
• B2 and B3 as incoming from the last loudspeaker.

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The two outer connections of the green output connector are for the A-path. The inner connectors are for the B path, the so called returning path of the loop.

The TC8200 loop system has full control of the loop and will detect the following faults:

• Short circuit in the loop cabling
• Breach of line in the loop circuit.

Mandatory requirement in EN54-16:

Detection of errors in loop need to be recorded within 100 seconds.

• Short circuit will be detected immediately
• Open line within 100 second

The PCB-B board has four relays to switch the incoming and outgoing plus and minus.

The PCB-B is connected to the IS8200 isolators in the loop

More information

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