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MMB-2 Connections and Ratings
FIELD WIRING
The screw terminals for the field
wiring circuits are located on the left
and right sides of the MMB-2. They
are labeled TB1 through TB5.
The field wiring circuits available are:
• CZM-1B6 power
• Analog device loop 1
• Analog device loop 2
• Notification appliance circuit 1
• Notification appliance circuit 2
• Common alarm relay
• Common supervisory relay
• Common trouble relay
• Style 4 RS-485 Network (MNET)
The following sections describe each
circuit type and give the related instruc-
tions. Refer also to the wiring diagrams.
CZM-1B6 power
Auxiliary power is available on TB5,
terminals 9 through 12. The circuit is
power limited per NEC Article 760 and
is rated at 1 amp, 18-31 VDC.
This power supply is for use with the
CZM-1B6 Remote Conventional Zone
module.
You may connect a maximum of 20
CZM-1B6s to this power source.
MOM-4 24V Wiring
9
10
11
12
+
_
TB5
CZM-1B6
CZM-1B6
CZM-1B6
T-TAPPING ALLOWED
CLASS B WIRING
CZM-1B6 Supervised Auxiliary Power
Class B Wiring
9
10
11
12
+
+
_
_
TB5
CZM-1B6
NO T-TAPPING ALLOWED
CLASS A WIRING
CZM-1B6 Supervised Auxiliary Power
Class A Wiring
Class B wiring can be used to obtain the maximum of 20
CZM-1B6s. Each Class B wire run can support a maximum
of 20 CZM-1B6s, 4 ohms total. Multiple Class B power
connections can be used provided you do not exceed the
rating above (20 CZM-1B6s max and 4 ohms per run max).
For example, you could have four individual Class B power
runs, for a total of 20 devices (6, 4, 3, and 7 CZM-1B6s), each
of the four runs not exceeding 4 ohms total.
Class A wiring can support a maximum of 20 CZM-1B6s,
wire resistance 4 ohms total.
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