Baldwin Boxall VIGIL BVR20 Setup Instructions
Also see for VIGIL BVR20: Setup instructions
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Page 7 IBVR20 software 8.43.doc Issue 1MAINTENANCE OF THE BVR20If a fault is suspected on any of the BVR20 modules, simple substitution with a spare can becarried out as first-line maintenance. Before removing any module ensure that the two DCsupplies are disconnected by removing the lower 8-way blue plug from the CPU module.The CPU module BVRCPU – as viewed from the rear – is located at the extreme right handside, position 21.Carefully remove all connectors to the suspected module with a small posi-drive screwdriver,release the two retaining screws at the rear of the module and, observing electro-staticprecautions, carefully remove the module. To replace the module, carefully slide in the newmodule, fasten it using the two screws, replace the connectors and now you are ready toapply power. Please ensure that the correct module has been fitted in the correct position.The heart of the BVR20 is the CPU module – BVRCPU - which controls all the input andoutput routing, together with all monitoring facilities. Please note this module must only befitted in position 21, at the extreme right hand side of the BVR20.As a simple guide to fault finding, should one zone output be faulty then it would be true tosuspect the output card serving that zone – especially if the other channel is operating.Input modules – BVRI4 - have four inputs, each with a max sensitivity of -20dBm ( 80mV),which is amplified and presented to the audio bus structure at 0 dBm ( 800mV).The message module –BVR802 – has the facility for four messages and provides 20 optoisolated inputs to interface with fire detection panel sounder circuits. Again the signal fromeach message is presented to the audio bus at 0dBm. The system monitors the audio outputpresented to the first output module and the DC bias present at the output of the digital-to-analogue converter, which is displayed as a memory fault.The dual output card –BVR02 – has two line outputs of 0dBm and provides frequencyequalisation and gating from all the 20 input signals. This module also provides volt-freerelay contacts, which change condition when the zone is busy.On the system there are two signal input/output cards – the BVRIO40 which, in conjunctionwith the interface cards – the BVRACO, monitor the external loudspeaker lines using theBEL1 end of line units. The BVRACO also provides automatic changeover in the event of afaulty amplifier to a reserve. The module positioned in P18 serves all the ‘A’ circuits, whilstthe one fitted to P19 serves all the ‘B’ circuits. Input signals for the reserve amplifiers areobtained from output modules plugged into P16 and P17 and automatically, in the event ofan amplifier failure, route the correct source of signals to the relevant reserve amplifier.All of the BVR20 modules are fed from an unregulated dual supply line and regulation isprovided on each module. The supply input to each card is protected by a poly-switch self-resettable fuse and, in the case of the CPU, a dual regulator path is provided.Please note: Under no circumstances remove or replace a module with the powersupply connected.Should a faulty module be discovered, repair can only be accomplished in an equippedworkshop. Therefore, we recommend that first-line maintenance is carried out by replacingmodules from a spares stock.If the system has automatic changeover it will be necessary to press the ‘CPU Restart’on front panel when the faulty amplifier is replaced. |
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