Wiring a Signaling Line Circuit (SLC)
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AFP-300/AFP-400 Installation PN 50253:C1 05/22/97 2-49
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The MMX Monitor Module is an addressable module that monitors conventional
contact-type, alarm, supervisory, security, alert, or trouble initiating devices. You can
wire a supervised MMX circuit as an NFPA Style B or Style D IDC.
• NFPA Style B Initiating Device Circuit – see Figure 2-69 and Figure 2-70.
• NFPA Style D Initiating Device Circuit – see Figure 2-71 and Figure 2-72.
• There are three models of MMX Series monitor modules as follows:
MMX-1
– Use MMX-1 modules for wiring Style B and Style D IDCs.
MMX-2
– The MMX-2 Monitor Module is an addressable module used to monitor
a single Initiating Device Circuit of smoke detectors. Use MMX-2 modules to
monitor conventional, two-wire smoke detectors. The MMX-2 requires an
additional connection of 24 VDC filtered, low-noise and resettable power on
MMX-2 Terminals 3 (–) and 4 (+).
MMX-101
(Style B circuits only) – The MMX-101 is a miniature addressable
module that is functionally and electrically identical to an MMX-1 Monitor
Module. Because of the smaller size, an MMX-101 is ideally suited for mounting
directly in the electrical box of a monitored contact-type device.
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Connect the SLC wiring to MMX terminals 1 (–) and 2 (+). The MMX takes one
module address on the SLC. Use the rotary switches on the MMX to set the module to
the required SLC address. (For example, the MMX-1 shown in Figure 2-68 is set to
SLC address 04.)
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When installing MMX-1 and MMX-101
modules, note the following:
1. The IDC is supervised and current-limited to 210 microamperes @ 24 VDC
(nominal).
2. The IDC provides the following services (do not mix):
Fire Alarm Service.
Automatic/Manual Waterflow Alarm Service with normally open contact devices.
Sprinkler Supervision with normally open contact devices.
Security Service.
3. Maximum IDC wiring resistance is 20 ohms.
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