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The M302 Monitor Module
Style B Initiating Device Circuit (Utilizing M300)
The NFPA Style B IDC (Initiating Device Circuit), utilizing an M300 Monitor Module, is supervised and
power-limited.
Style B Circuit using M300
FIGURE 2-19:
Resettable 24 VDC
4-wire smoke
detector power
(300 mA max.)
+
-
+
-
T
B
1
2
3
4
4
24V (+) TB4-5
24V (-) TB4-6
24 VDC 4-Wire Smoke Detector
To Next Device on Loop
-
+
+
-
MS-9200
5
6
Document #50428
End-of-Line Resistor
47K ohm, ½ watt resistor
(N-ELR in Canada)
Manual Pull
Station
Heat Detector
-
-
+
+
+
-
CAUTION! Do not loop wiring
under any terminals. Break wire
run to maintain supervision.
M300
Shield
A
T
B
6
Rev. C1
2/15/99
P/N 50428:C1
UL listed Power Supervision Relay
(must be wired as last device on
loop as shown).
-
-
+
+
-
-
+
+
-
+
-
+
-
+
-
+
Loop Out
B B+ A+ B- A-
1
2
3
4
5
6
SLC (+) TB6-3
SLC (-) TB6-5
37
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