Description
The DC line monitor isolator units are CANBUS modules for the VIGIL2 voice alarm system, consisting of two components: BVRDADIM and BVRDADIS. They are certified to AS4428.16
Key Features
- Enables dual loudspeaker circuits to connect to a single amplifier.
- Each BVRDADIS unit provides both A&B circuits for two amplifiers.
- Up to 10 spurs per loudspeaker line.
- The BVRDADIM master unit connects to the BVRD2M router.
- Up to five BVRDADIS can be connected to one BVRDADIM.
- Fitting five BVRDADIS enables broadcast and monitoring for up to twenty loudspeaker circuits.
- The modules plug directly together.
- Utilises DC line monitoring techniques, therefore BEL1 end of line monitoring is not required. (Please refer to ?system requirements?.)
- Failure of either the A or B circuit from one amplifier will not effect the other circuit.
- In the event of an amplifier failure, reserve amplifiers will automatically operate.
- With five BVRDADIS fitted, a one-in-ten amplifier changeover ratio is enabled.
- Reduces rack size and cost for large voice alarm systems.
- Earth leakage protection.
System Requirements:
- Maximum of 225W load per loudspeaker line.
- Each loudspeaker requires a capacitor (refer to table below). We recommend that you take advice from your loud-speaker supplier.
- Each end-of-line loudspeaker requires a 10K 2W (at 1% tolerance) resistor fitted across the line. (Available in packs of ten – product code BVRDADCR.)
