Pelco PT7800 User Manual

INSTALLATION/OPERATION

PT780 Legacy
Pan and Tilts

®

Series

C342SM-A (5/06)

Contents

Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Pt780 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

PT780 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Exploded Assembly Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

List of Illustrations

1 Pan and Tilt Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

2 PT780 Series Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3 Exploded Assembly Diagram of Mechanical Parts-PT780 Series 24 VAC and 120 VAC Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

4 Exploded Assembly Diagram of Mechanical Parts-PT780 Series 12 VDC Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

5 Exploded Assembly Diagram of Hardware-PT780 Series 24 VAC and 120 VAC Models.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

6 Exploded Assembly Diagram of Hardware-PT780 Series 12 VDC Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

List of Tables

A Mechanical Parts List (Figure 3 and Figure 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

B Mechanical Parts List (Figure 3 and Figure 4) (continued). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

C Hardware Parts List (Figure 5 and Figure 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

2 C342SM-A (5/06)

Important Safety Instructions

1. Installation and servicing should be done only by qualified service personnel and conform to all local codes.

2. The weight of the camera/lens and enclosure must not exceed 40 lb (18.14 kg) with 12 VDC pan and tilts or 52 lb (23.59 kg) with 24 VAC or
120 VAC pan and tilts.

3. Only use replacement parts Pelco recommends.

4. After replacing/repairing the unit’s electrical components, conduct a resistance measurement between line and exposed parts to verify the
exposed parts have not been connected to line circuitry.

5. Installation methods and materials should be capable of supporting four times the combined weight of the enclosure, pan and tilt, camera,
and lens.

The product and/or manual may bear the following marks:

This symbol indicates that dangerous voltage constituting a risk of electric shock is
present within this unit.

CAUTION:

This symbol indicates that there are important operating and maintenance instructions
in the literature accompanying this unit.

To reduce the risk of electrical shock, do not remove cover. No user-serviceable parts
inside. Refer servicing to qualified service personnel.

RISK OF ELECTRIC SHOCK.

DO NOT OPEN.

C342SM-A (5/06) 3

Description

PT780 DESCRIPTION

The PT780 Series pan and tilt units are designed for medium duty, indoor/outdoor use.

Only Legacy Series enclosures can be mounted on the pan and tilt units. These enclosures are EH4700L and EH5700L environmental enclosures
and the EH8106L pressurized enclosure.

You can easily removee the clamshell covers from the sides of the pan and tilt units to access all internal parts without having to remove the
camera enclosure. This makes servicing the units and adjusting the pan and tilt limit stops easy.

PT780 MODELS

The PT780 Series consists of the following models:

PT780P Heavy-duty, indoor/outdoor pan and tilt, 120 VAC.

PT780P/PP PT780P with preset positioning capabilities.

PT780SL PT780P with 360° pan rotation.

PT780SL/PP PT780SL with preset positioning capabilities.

PT780VS Heavy-duty, indoor/outdoor, variable-speed pan and tilt, 12 VDC.

PT780VS/PP PT780VS with preset positioning capabilities.

PT780/VSSL PT780VS with 360° pan rotation.

PT780-VSSL/PP PT780-VSSL with preset positioning capabilities.

PT780-24P Heavy-duty, indoor/outdoor pan/tilt, 24 VAC.

PT780-24P/PP PT780-24P with preset positioning capabilities.

PT780-24SL PT780-24P with 360° pan rotation.

PT780-24SL/PP PT780-24SL with preset positioning capabilities.

4 C342SM-A (5/06)

Maintenance

If you need to remove the enclosure, protect the RediLINK
connection. Also, damage to the pan and tilt unit or enclosure could occur when power is turned on.

The following servicing should be done every six months with average use.

1. Remove the PT780’s outer casing.

a. Remove the Phillips screw on each side of the pan and tilt unit.

b. Place your hands under the cover halves. Exert a strong, upward force to release the covers from their internal latching devices.

c. Pull the cover halves away from the pan and tilt unit. Set the covers down or hang them by the eyelets inside the covers. (The wire

and hook on which to hang the covers is not provided.)

2. Inspect the gaskets around the cover, tilt shaft, and spindle for damage.

3. Refer to Figure 1. It shows the parts locations of the tilt assembly. Look for similar orientations of parts when adjusting the pan assembly.

4. Check the backlash adjustment.

Backlash is the slack or binding in a pan and tilt base mount. Determine backlash by lifting the maintenance assembly, grasping the base,
and wiggling it. There should not be any play or binding between the gear (A) and worm drive (B). Play or binding indicates a backlash
problem.

• One backlash problem involves a worm and worm gear connection loose enough to cause slipping or tight enough to cause binding.

• The second involves a too-loose or too-tight chain, usually causing symptoms similar to the worm and worm gear problem–slipping or

binding.

a. Verify that the worm drive (B) is fully seated in the worm gear (A). If it is not:

(1) Locate the worm-driven gear for either the pan or the tilt motor linkage. Loosen the three hex screws (F) holding the worm in

place, but leave enough thread in place to hold the assembly on the mount.

(2) Using your thumbs, gently move the worm forward or pull the assembly back from the worm gear to either tighten or loosen the

gear spacing to the worm gear. Move the base of the pan and tilt to check the adjustment.

(3) If you get movement in the base, press a finger down in the middle of the worm assembly. If you get no movement in the base,

use your thumb and forefinger to pull the worm assembly back until you get movement.

(4) When the spacing is correct, tighten the hex screws. Start with the middle screw to ensure proper spacing.

(5) Remove the screw (C) in the gear train nut (D).

(6) Tighten the gear train nut to remove any play.

(7) Line up the hole in the gear train nut with the nearest hole in the gear train bracket (E).

(8) Replace the screw.

™

connector area against moisture, dust, dirt, etc. Failure to do so could result in a bad

C342SM-A (5/06) 5