NFPA Standard-Specific Requirements
194 MS-9050UD PN 52413:C 01/23/08
C.2 MBT-1 Municipal Box Trip - Silenceable
The following figure illustrates the connection of the MBT-1 (Municipal Box Trip) between the
FACP and a Local Energy Municipal Box. The use of an addressable control module programmed
for General Alarm and Silenceable allows silencing of the Municipal Box without resetting the
panel or box.
MS-9050UD
CMF-300
Control Module
24 VDC, Nonresettable
+ -
SLC Loop
B+ -B
Shield
red
black
MBT-1
brown wire
white wire
EOLR-1 Power
Supervision Relay
Alarm polarity shown!
-
+
- To next device
+ on SLC Loop
Braided-shield/Drain Wire
The addressable Control Module must be programmed
as Silenceable and General Alarm.
Gamewell Model M34-56
Local Energy Municipal Box
Note: 10Ω maximum loop
resistance due to wiring from
power supply to Municipal Box.
Connect wires to two
red terminals on box.
(All contacts shown in energized position).
Figure C.5 MBT-1 Silenceable
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