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Document 15949 Rev. E 4/12/95 P/N 15949:E
3.2 Wiring the Communications Loop Circuit
The AIM-200 communicates with intelligent and addressable initiating, monitor and control
devices through a communications loop. The System 5000 can support up to ten communi-
cations loops, each controlled by an AIM-200 module. The communications loops can be
wired as non-redundant (Figure 3-6), redundant (Figure 3-7), or isolated redundant (Figure
3-8).
Isolator Modules
Isolator modules (ISO-X) permit a zone of detectors and modules to be electrically isolated
from the remainder of the communications loop, allowing critical loop components to func-
tion in the event of a circuit fault (see Figures 3-8 and 3-12).
Monitor Modules
Addressable monitor modules (MMX-1, MMX-2, and MMX-101) allow the AIM-200 to moni-
tor entire circuits of conventional normally open contacts, alarm initiating devices, manual
pull stations, 4-wire smoke detectors, heat detectors, and waterflow and supervisory de-
vices (Figures 3-13A and 3-14A). A type of monitor module, the addressable BGX-101L,
provides point annunciation of manual pull stations (Figure 3-18).
Control Modules
Through addressable control modules (CMX-2), the System 5000 can selectively activate
notification appliance circuits or Form-C output relays (see Figures 3-15 through 3-17).
Intelligent Detectors
Through the communications loop, the AIM-200 communicates with intelligent ionization,
photoelectric, and thermal detectors (Figure 3-19).
Loop Capacity
The capacity of each AIM-200 includes up to 99 intelligent detectors and an additional
combination of up to 99 addressable pull stations, control modules, and monitor modules.
One to ten AIM-200s can be employed, depending on system requirements.
Notes:
1) Communications loop is supervised and power limited.
2) Maximum loop length is 10,000 feet (total twisted pair length).
3) Maximum loop voltage: 27.6 VDC.
4) Maximum loop current: 200 mA (short circuit) 100 mA (normal operation)
5) Maximum loop resistance: 40 ohms.
6) Refer to the proper installation drawing supplied with each communications loop ap-
pliance.
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