Description
This unit is specifically designed to monitor the condition of 100V line speaker systems in emergency paging and fire evacuation installations. It can handle large commercial speaker circuits with loads of up to 250W per zone, whereas traditional line monitoring units were limited to 50W per zone.
The A 4567C is capable of handling loads of up to 500W per zone. Its microprocessor controlled circuit provides continuous monitoring of loudspeaker lines for normal, open, or short circuit conditions. An LED indicator, with multiple colors, displays the line's condition for each zone.
The Redback Line Monitoring Unit 10 Zone A4567C includes a built-in buzzer with a cancel button for audible alarm alerts. The unit also offers a switched output for remote monitoring in the event of a fault condition. The output is a ground signal and the unit provides three outputs: one for short circuit conditions, one for open circuit faults, and one combined output for any fault condition. The unit can be customized to work with multiple amplifiers.
Dimensions: 482 x 152 x 44mm.
Features
- 1U 19" rack mount
- Monitors 10 zones @ 500W max
- Configurable for use with 1 to 10 individual amplifiers. ie 1 amplifier per zone/circuit or 1 amplifier per many zones/circuits.
- Monitors normal, open and short circuit conditions
- Switched output for remote fault monitoring
- Pluggable terminals for all connections
- 24V dc operation
- Includes Power Supply
Wiring Requirements
This unit is specifically designed for "loop in loop out" serial wiring to loudspeakers and requires a 100kΩ terminating resistor at the end of the line. The use of star wiring or tee offs is strictly prohibited. In order for each loudspeaker to function properly, a series connected 22µf bipolar capacitor is also necessary. Additionally, a 10-second delay is included to minimize false alarms when detecting faults.
A 4568 Zone Status Interface
When using the A 4568, you can effectively track the state of every individual zone by setting up the interface in two different ways. The LED status can either indicate a normal or faulty state (without differentiating between open or short) or it can specifically display if there is an open or short. A Cat 5e patch lead is used to connect the A 4567C and A 4568, with screw terminals available for each zone.
