System Overview System Components
12 NFS-640 Installation Manual P/N 51332:B1 12/01/2003
2.1.2 Options
Refer to Section 2.2 “System Components” for descriptions of the various optional modules.
• QWERTY silicone-rubber keypad with a 2x40 LCD display and eight indicator LEDs
• Optional LEM-320 provides a second SLC loop that is electrically identical to the one on the
main board
• Optional devices include: UDACT Universal Digital Alarm Communicator/Transmitter, ACM-
8R remote relay module to increase point capacity, audio and voice components, and panel
circuit modules
• Optional LCD-80 connected through an EIA-485 interface allows monitoring the system—up to
6,000 feet (1829 meters) from the control panel
2.1.3 System Limitations
System expansion must take into consideration the following:
1. The physical limitations of the cabinet configuration.
2. The electrical limitations of the system power supply.
3. The capacity of the secondary power source (standby batteries).
2.2 System Components
2.2.1 Basic Equipment Required
A basic NFS-640 system requires at least the following components:
1. The control panel. CPU-640 (120V operation) or
CPU-640E (240V operation).
This printed circuit board is the “control panel” itself and the heart of the system. It also
includes an expander cable for connecting panel modules, a grounding cable, battery
interconnect cables, and document kit.
2. One or more chassis. CHS-M2 mounts the CPU-640/CPU-640E.
To mount additional rows of optional equipment, order one or more chassis from this list:
CHS-M2, CHS-4N (included in shipkit CHS-4MB), CHS-4L.
3. A primary display. Generally this is a KDM-2 keypad/display, a DP-DISP dress panel, and
two BMP-1 blank module panels. For information on using NCA as primary display instead of
KDM-2, see Section 3.5.2 “Using NCA as Primary Display” and the NCA Manual.
4. A backbox and door:
SBB-A4 and DR-A4 (one row of equipment) or
SBB-B4 and DR-B4 (two rows of equipment) or
SBB-C4 and DR-C4 (three rows of equipment) or
SBB-D4 and DR-D4 (four rows of equipment)
(For a solid-metal door add “B” to the part number; for a red door add “R”.)
5. A battery dress panel BP-4
6. Batteries (Refer to Appendix A.3 “Calculating the Battery Requirements” for system current-
draw calculations; CAB-4 series backboxes holds batteries up to 24 AH maximum.)
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