Operation of speaker lines with Loop Isolators - Configuration

'HARDWARE_PROTECT'

The whole loop is switched off because of a malfunction during the startup phase.

While startup, the loop will enable segment after segment, until the loop is fully closed.

If the pilot tone supplied at the start of the loop is not measured at the end of the loop, the status will change to 'HARDWARE_PROTECT'.

Missing speaker connected to a loop isolator

Cross bonding of +100 V and 0 V speaker line wires.

Short-circuit on this speaker line

A segment of the loop is disconnected (e.g. due to a broken connection)

Pilot voltage not sufficient to supply the Loop isolators > increase the pilot tone gain

'OK'

The loop is free of faults and is working in regular monitoring mode.

–

'BREAK'

Problem in loop.

The loop needs to be inspected by a trained technician to resolve the cause of the fault.

The loop isolator detected a fault and shut down a segment of the loop

Missing speaker connected to a loop isolator

'NO_PILOT_SIGNAL'

This state is temporary and switches the loop status to 'BREAK' state.

The amplifier cannot supply enough power to the loop.

Pilot voltage not sufficient to supply the Loop isolators > increase the pilot tone gain

Check the limits of the pilot tone setting 'Value' and 'Tolerance'

Short-circuit on this speaker line

'SHORT_CIRCUIT'

The speaker line is switched off and not checked again until a fault reset takes place.

Short-circuit on this speaker line