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Pelco Manual C1900M (4/99) 11
3
4
4.3.2 Replacing the Auto Iris Lens Cable
Plug (Refer to Illustration D )
Cover
Auto-iris cable
Rib (If the cable is thick and the plug cover does
not seat properly, cut away this rib.)
Lens plug
1
2
3. Apply heat to the heat shrink tubing.
4. Put the cover on the plug.
ILLUSTRATION D ELEMENTS
4.3 LENS INSTALLATION
4.3.1 Auto Iris
Install an auto-iris lens as follows:
(Refer to Illustration E )
1. Unscrew lens mount cap.
2. Screw in the lens.
NOTE: When attaching a C-mount type lens,
be sure to turn the C/CS adjustment ring fully in
the “C” direction. When the C/CS adjustment
ring is set to “CS,” mounting any lens with a
mount projection of more than 5/32 in. (4 mm)
may damage the internal parts of the camera.
3. Check the plug wiring on the lens cable against
Illustration D and the pin-outs in step 2 of Section
4.3.2. If you need to replace the existing plug on
the lens cable, follow the instructions given in Sec-
tion 4.3.2.
4. Loosen the back focus LOCK screw. Adjust the
back focus by turning the C/CS adjustment ring in
accordance with the type of lens fitted (C-mount
or CS-mount). Once adjusted, tighten the back fo-
cus LOCK screw. (The factory setting is C-mount.)
For amplified or in-depth back focus adjustment
instructions, see the Information Boxes on pages
13 and 14. General Information, if needed, is pro-
vided on page 12.
D
Auto-Iris Plug
Pin-out (Back of Plug)
Pin # DC-Servo Lens VS-Servo Lens
Pin 3: Drive (+) Video signal
Pin 1: Control (-) Power supply
(9 VDC 50 mA)
Pin 2: Control (+) Not used
Pin 4: Drive (-) Ground
2
3
4
1
1
2
3
4
42
13
1
3
2
4
Changing the Plug on an Auto-Iris Lens Cable
4.3.3 Manual Iris
Follow the instructions in Section 4.3.1, but ignore all
instructions for changing the lens cable plug.
1. Remove the old lens plug from the cable.
NOTE: Refer to the lens manual to determine
the cable color code.
2. Remove the plug cover 1 , add heat shrink tubing
to the wires, and solder the lens cable 2 to the
pins 1 thru 4 on the plug supplied. The pin
assignments are as follows: