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36
BM 25A/AW
Instruction Manual
Figure 21 : In the example above, BM 25AW tag G communicates with E and F. In the
event of a loss of communication between G and F, E still ensures the communication to
the rest of the network. If G goes into gas alarm or fault condition, all BM 25AWs on the
network will report a corresponding alarm
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 in alarm condition so that the appropriate action can be
taken. Although there is no hierarchy in a mesh network, the unit in alarm and the unit
reporting the alarm are referred to later in the manual as 'main
’ and ‘secondary’ BM
25AW, respectively.
Main BM 25AW
Secondary BM 25AW
Case
Cause
Flash
Siren
Flash
Siren
1.
Fault (no communication at
all, sensor fault, low battery,
etc.)
Steady
Yes
Steady
Yes
2.
At least one BM 25AW does
not communicate
Steady
No
Steady
No
3.
Alarm 1
1 Hz
1 Hz
0.5 Hz
0.5 Hz
4.
Alarm 2
2 Hz
2 Hz
0.5 Hz
0.5 Hz
Table 1 :
‘Alarm’ mode – Table of events
Two-way
communication
Summary of Contents for BM 25A/AW
Page 1: ...BM 25A AW Area Gas Monitor Part Number NP25AEN Version C 4 User Manual ...
Page 10: ...10 BM 25A AW Instruction Manual Product Overview Figure 2 Product Overview ...
Page 18: ...18 BM 25A AW Instruction Manual ...
Page 34: ...34 BM 25A AW Instruction Manual ...
Page 70: ...70 BM 25A AW Instruction Manual ...
Page 75: ...9 Special Instructions 75 CSA Control Drawing for BM 25A AW Connections ...
Page 78: ...78 BM 25A AW Instruction Manual ...