Oldham BM25, User Manual

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40 BM 25/25W
Instruction Manual
■
It is important that all BM 25Ws intended to be on the same network have the same
network ID.
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In Controller mode, two BM 25Ws cannot share the same address otherwise you
will get a fault.
Once wireless mode is activated (‘
BM 25
’ or ‘Controller’ mode), you have 5 minutes to
declare another BM 25W on the same network. When the time is gone and no
communication is established, BM 25W shows 'COMM ERR' and goes into fault (see
case #1 from table of events).
Figure 26 : COMM ERR , no communication is established
Thereafter, in normal operation, each BM 25W sends its information over the network
every ten seconds. If a BM 25W goes into gas alarm or fault condition, then the
information is immediately sent without waiting ten seconds. In
BM 25 mode , the
number of BM 25Ws that are communicating on the network is shown at the bottom of
the display screen (example 4 shown below).
Figure 27a
–
BM 25 mode : Four BM
25Ws communicate with each other
on the same network
Figure 27b
– Controller mode : BM 25W
is communicating with the controller
When in
BM 25 mode , BM 25W displays the radio signal strength as indicated below in
figure 27c. It corresponds to the average of signals received from all BM 25Ws that the
BM 25W you are looking at is communicating with.