NFS2-640/E Installation Manual —
P/N 52741:P2 7/10/14
21
Laying Out Equipment in Cabinet and Chassis
Installation
•
Mount the backbox on a surface that is in a clean, dry, vibration-free area.
Follow the instructions below.
1. Mark and pre-drill holes for the top two keyhole mounting bolts (0.25 inch, 0.635 cm). Use
mounting hardware appropriate for the mounting surfaces and weight of loaded cabinet; see
UL 2017 Pull-Test Requirements.
2. Select and punch open the appropriate knock-outs. (For selection guidelines, see Section 3.11
“UL Power-limited Wiring Requirements”.)
3. Using the keyholes, mount the backbox over the two screws.
4. Mark the location for the two lower holes, remove the backbox and drill the mounting holes.
5. Mount the backbox over the top two screws, then install the remaining fasteners. Tighten all
fasteners securely.
6. Feed wires through appropriate knockouts.
7. Install control panel and other components according to Section 3.5 “Installing the Control
Panel” before installing hinges and door according to
CAB-3/CAB-4 Series Cabinet
Installation Document.
3.4 Laying Out Equipment in Cabinet and Chassis
The NFS2-640/E allows for flexible system design. Backboxes are available to hold up to four rows
of equipment (four chassis), plus batteries. Each chassis has four “slots” -- the basic positions
available side by side on a chassis. The number of modules that can be mounted in each position
depends on the chassis model and the module size.
Follow these guidelines when deciding where to locate equipment in the backbox.
The NFS2-640/E control panel and adjacent first-row modules mount in the NFS2-640 chassis,
typically installed in the first/top row of the backbox behind DP-DISP2. (Use ADP2-640 if
mounting NFS2-640 chassis in a lower row.) NFS2-640 chassis holds four layers of equipment,
including the control panel. See Figure 3.3. The primary display (KDM-R2 or NCA-2) mounts in
front of NFS2-640/E.
!
CAUTION:
Unless you are familiar with the placement of components within this backbox, only use the knockout
locations provided for conduit entry.
Keyholes
2 places
Mounting holes
2 places
CAB-4
Series
Backbox,
A-size (one-
row)
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0
ca
bi
ne
tm
oun
ting
ho
le
s.w
m
f
CAB-4
Series
Backbox,
D-size
(four-row)
Figure 3.1 Mounting Holes of a Backbox
