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INSTALLATION AND OPERATION
The 1/4-20 fasteners threaded into these
holes must not protrude through the base more
than 0.1 inch.
The 3960 can be directly mounted to the wall
mount arm (section 4.3 below) or to any other
base that matches the 4.75-inch diameter hole
pattern on the 3960 Base.
Proceed as follows to install the 3960 on a
pedestal:
1. Route the cable pigtail down into the pedestal.
This cable should be secured by a strain relief and
not allowed to hang free within the pedestal if there
is a long cable run hanging underneath. (If an
access plate is not available at the top of the
pedestal, the system cable must first be connected
to the pigtail connector.)
2. Bolt the 3960 to the pedestal using stainless
steel hardware.
3. Attach the pigtail connector to the system
connector. This often is done through a removable
access plate. Be sure these cables are secured
with a strain relief so that they do not hang free with
long cable runs.
4. Verify that the 3960 will have a full range of
movement without striking any nearby structure.
5. Refer to section 3 to set up and check out the
3960.
4.2 LARGE BASE PLATE INSTALLATION
This plate is not required for any of the Cohu
supplied mounting arms and brackets covered in
this manual. It is an optional 8.5 inch diameter
base plate that attaches to the 3960 base plate to
provide additional mounting hole options.
Figure 18 is the dimensional diagram of this
optional base.
It attaches to four threaded holes on the
3960 standard base with flathead 1/4-20 x 3/4
mounting screws. Use of flathead screws main-
tains the entire surface of the adapter plate flat for
placing on an existing on-site mounting base
These holes are on the 4.750 diameter
6X-1050a
pattern. If site-supplied flathead screws are used
they must not protrude through the standard base
plate by more than 0.1 inch. More than this would
jam into the 3960 housing.
This optional base has two four-hole patterns
for mounting to a pedestal or other type mount. One
pattern is on a 7-inch diameter and the other on a
7.25-inch diameter pattern. Holes on each pattern
are spaced 90° from each other. These patterns are
offset from each other by 22.72°.
All support mounting holes are 0.380 diameter.
They are intended for 3/8-inch hardware. Use high
quality fasteners made from grade 316 stainless
steel.
4.3 WALL MOUNT INSTALLATION
Figure 4 shows the wall mount arm. For a wall-
mount installation, the support arm bolts directly to
a wall. An adapter plate on the end of the arm
matches the hole pattern of a 3960 base. The 3960
is placed on the arm and is then bolted to it. This
arm is also used with the remaining three mounting
methods (pole, corner, and parapet).
Figure 22 shows dimensions of the basic wall
mount arm. The 0.38-inch diameter holes (slotted)
are suitable for use with 5/16-inch mounting hard-
ware. All mounting hardware should be of high
quality and made from grade 316 stainless steel.
This diagram does not show the adapter plate
on the end of the arm to which the 3960 fastens.
This adapter plate has four 1/4-20 threaded
holes on a 4.75-inch diameter hole pattern to match
the baseplate of the 3960.
The basic installation procedure is:
1. Verify that the system cable is accessible for
connection to the 3960 pigtail cable at the mounting
location.
2. Install a connector to the end of the system cable
(if not already installed).
3. Attach the adapter plate to the wall mount arm (if
not already attached).
3960 CAMERA
23
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