38
BM 25A/AW
Instruction Manual
Controller Mode
In Controller mode, BM 25AWs send fault status, alarm status and gas measurements
to the controller. As soon as one BM 25AW fires an alarm, the controller relays the gas
alarm information to all BM 25AWs on the same network that then turn in Alarm
Transfer mode.
Figure 24 : In the example above, BM 25AWs E and F are the last links between the
controller and the rest of the network. If communication between BM 25AW F and MX 40
fails, then BM 25AW E continues to provide communication between the BM 25AW
network and the controller. If BM 25AW A goes into gas alarm or fault condition, then MX
40 receives information and passes the gas alarm on all others BM 25AWs.
The alarm sequence differs depending on whether a BM 25AW sends information (gas
alarm or fault) or receives information (alarm transfer). This allows for quick
identification of the BM 25AW that is in alarm so that appropriate action can be taken.
Two-way
communication
Содержание BM 25A/AW
Страница 1: ...BM 25A AW Area Gas Monitor Part Number NP25AEN Version C 4 User Manual ...
Страница 10: ...10 BM 25A AW Instruction Manual Product Overview Figure 2 Product Overview ...
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Страница 75: ...9 Special Instructions 75 CSA Control Drawing for BM 25A AW Connections ...
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Страница 79: ...10 Declaration of EC Conformity 79 ...