Installation Laying Out Equipment in Cabinet and Chassis
30 NFS-640 Installation Manual P/N 51332:B1 12/01/2003
3.4 Laying Out Equipment in Cabinet and Chassis
The NFS-640 allows for flexible system design. Follow these guidelines when deciding where to
locate equipment in the backbox.
The first row of equipment mounts in chassis CHS-M2. Mount second, third, or fourth rows of
equipment in chassis CHS-4N (panel circuit modules, see Section 3.7 “Installing Panel Circuit
Modules”), or in chassis CHS-4L (voice components, see the Voice Alarm System Manual). Some
equipment, such as the NCA and annunciators, may be door-mounted; refer to the equipment’s
documentation for instructions.
There are four basic positions available on a chassis (side-by-side); the number of modules that can
be mounted in each position depends on the chassis model and the module size.
The CHS-M2 accepts four layers of equipment, including the control panel. The control panel fills
three positions in the first-installed layer, its integral power supply occupies two positions in the
next two layers, and the optional display occupies the two left-most slots in the fourth layer (flush
with the door). Panel circuit modules and other modules of the same sizing can be mounted in
several layers, depending on the desired configuration; see Table 3 to determine hardware. Some
equipment, such as the NCA, may be door-mounted directly in front of the control panel. The
BMP-1 Blank Module Plate covers unused positions in a dress-panel, providing another mounting
location for some modules, such as TM-4 (see BMP-1 Product Installation Drawing for details).
Figure 6 Equipment Mounting Locations (First-Row Chassis CHS-M2)
Note: When designing the cabinet layout, consider separation of power-limited and non-power-
limited wiring as discussed in Section 3.6 “UL Power-limited Wiring Requirements”.
nfs640-chs-m2-11-03.wmf
Panel circuit module mounted
on flanges above control panel
Available mounting slots for
panel circuit modules, TM-4,
and NCM-W/F.
Typical mounting location
for NCM-W/F or TM-4
Mounting location
for LEM-320
KDM-2
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