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2 Pelco Manual C361M-A (8/02)
IMPORTANT SAFEGUARDS AND WARNINGS
Prior to installation and use of this product, the following WARNINGS should be observed.
1. Installation and servicing should only be done by qualified service personnel and
conform to all local codes.
2. Installation shall be done in accordance with all local and national elecctrical and
mechanical codes using only approved materials.
3. Unless the unit is specifically marked as a NEMA Type 3, 3R, 3S, 4, 4X, 6 or 6P
enclosure, it is designed for indoor use only and it must not be installed where
exposed to rain and moisture.
4. The camera and lens combined weight shall not exceed 35 pounds (16 kg).
5. Only use replacement parts recommended by Pelco.
6. After replacement/repair of this 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.
7. Use only installation methods and materials capable of supporting four times the
combined weight of the enclosure, scanner, camera, and lens.
8. An ALL-POLE MAINS SWITCH with a contact separation of at least 3 mm in each
pole shall be incorporated in the electrical installation of the building.
9. For 24 VAC models only, use a UL Listed, Class 2 power source.
DESCRIPTION
The PS20 Series scanner is a medium-duty indoor/outdoor unit designed to operate with a
maximum load of 35 pounds (16 kg). The scanner features stepper motor technology, three
selectable speed settings, easy-to-adjust limit stops, and pan rotation of 380 degrees.
The PS20 scanner is capable of continuous and random operation when connected directly
to a power source. If a Pelco MPTAZ Series control is used, the scanner can operate
continuously, randomly, and manually.
MODELS
PS20 Medium-duty scanner, 120 VAC
PS20-24 Medium-duty scanner, 24 VAC
PS20/230 Medium-duty scanner, 230 VAC
INSTALLATION
The PS20 scanner can be mounted to any flat surface in an upright or inverted position. If
the scanner is to be attached to a wall/ceiling/pedestal mount, follow the instructions
provided with the mount.
Installation requires a mounting surface or mount with a center feed through hole. Use a
suitable wiring compartment/terminal box for connection with the AC mains supply and
attach the PS20 scanner directly to the mounting surface.
NOTE:
A terminal box or
compartment shall be pro-
vided in which mains supply
connections are to be made
and shall be such that these
connections are capable of
being readily made and in-
spected without disturbing
the wiring or the apparatus
after the unit is installed.