TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook BM 25A, User Manual

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BM 25A/AW
AREA GAS MONITOR
USER MANUAL
30 NPB25AEN
Revision D.0
In the example above, BM 25AW (unit D) is the only communication link between A, B, C and
E, F, G. If BM 25AW (unit D) had a fault (low battery for instance) or if an obstacle were to
disrupt communication between D and E or D and B, then all BM 25AWs would report a fault
failure (steady flashlight according to case No. 2 – see table of alarms).
IMPORTANT :
•
Note that the gas detection remains effective and that BM 25AW (unit D) would still
locally alarm in the presence of gas. It is the same for each BM 25AW on the network.
Only the alarm would not be transferred to the whole network.
•
To ensure maximum network reliability, a BM 25AW should always communicate with
at least two neighbors.
Figure 29 : group concept (read details below)
A long press on the « acquit » button forces the system to a new identification of the nodes
present on the network. BM 25AWs that do no communicate are ignored without triggering a
fault condition. In the example above, the communication between D and E is down. A long
press on the « acquit » button of BM 25AW (unit D) resets the network. All BM 25AWs
communicating with D automatically launch a new identification in turn. On one side, BM
25AWs A, B, C and D discover each other and form a first group. On the other side, BM
25AWs E, F and G still report a communication failure since they do not receive data from the
BM 25AWs of the newly formed group. A long press on the « acquit » button of one BM 25AW
(unit E, F or G) clears the list of BM 25AWs on the network and forces to a new identification.
Similarly as above, BM 25AWs (units E, F and G) form a second group.