Line Monitoring
A 4567C • Line Monitoring Unit 10 Zone
Specifically designed to monitor the condition of 100V line speaker systems in emergency paging and fire evacuation installations. Many large commercial installations have speaker circuits in excess of 250W. Traditional line monitoring units were limited to 50W per zone and would not handle this load. The A 4567C can handle loads up to 500W per zone.
S 4457 • 100V Line Evac Override Relay Box
Designed primarily for PA speaker line installations with two PA systems active in a building. Useful for applications where a dedicated evac speaker system is running along side a dedicated background music system. This box allows the background music to be disconnected when the evac system is active. It can also be used to switch between two different PA systems with only one output speaker line. Requires 24V DC power source (sold separately).
A 4567C • 10 Zone Line Monitoring Unit
Specifically designed to monitor the condition of 100V line speaker systems in emergency paging and fire evacuation installations. Traditional line monitoring units were limited to 50W per zone and would not handle this load. The A 4567B can handle loads up to 500W per zone.
A 4582 • 10 Zone Monitor Panel
A handy aid to test and adjust 100V line PA amplifier output levels. Capable of monitoring 10 individual amplifiers (electrically isolated from each other to prevent cross talk). Audible and visual monitoring is available from the built in speaker and VU meter.
A 4568 • Zone Status Interface To Suit A 4567B
Designed to interface the A 4567B Line monitoring unit with a fire indicator board. The addition of the A 4568 enables you to monitor the status of each individual zone.
A 4566 • In-Line 22uF Speaker line Isolator Box
This module has been designed to monitor the integrity of 100V Line speaker circuits. It is connected between the amplifier output and the speaker circuit. The module will detect one of three speaker line conditions. (Normal, Short Circuit or Open Circuit).