FPT1250EX/AMS Parts List................................................................................21
GPT1260EX Series Mechanical Parts List ..........................................................24
HPT1260EX Series Hardware List ......................................................................25
IPT1280P and PT1280SL Mechanical Parts List ...............................................27
JPT1280P and PT1280SL Hardware List ...........................................................29
KPT1280P/PP and PT1280SL/PP Mechanical Parts List ...................................31
LPT1280P/PP and PT1280SL/PP Hardware List ...............................................33
MPT1250 Series Electrical Parts List...................................................................34
NPT1250DC Electrical Parts List .........................................................................36
OPT1250DC/PP Electrical Parts List ...................................................................37
P12501007ACOMP Frame Scan Parts List ........................................................40
QPT1250EX/AMS Electrical Parts List ................................................................41
Pelco Manual C373SM-A (8/01)3
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.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.
3.Only use replacement parts recommended by Pelco.
4.The installation method and materials should be capable to supporting four times the
weight of the enclosure, camera and lens combination.
5.The total load on tilt table shall not exceed 100 lb (45 kg) with the center of gravity at
5 inches above the tilt table surface. The weight and stiffness of explosion-proof
cabling must be included in this weight calculation.
6.PT1250EX/AMS, PT1260EX Series Only–If used in marine applications, the
installation shall be in accordance with the Electrical Engineering Regulations of the
U.S.C.G., Subpart J, C.G. 259 (46 CFR Parts 110-113).
7.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.
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.
This symbol indicates that there are
important operating and maintenance
instructions in the literature accompanying
this unit.
Please thoroughly familiarize yourself with the information in this manual prior to installation
and operation.
CAUTION:
RISK OF ELECTRIC SHOCK.
DO NOT OPEN.
4Pelco Manual C373SM-A (8/01)
DESCRIPTION
All heavy duty pan/tilts can operate with loads up to 100 pounds (45.4 kg). Rugged hightorque motors with adjustable worm-gear final drives ensure long operational life and driftfree operation. All models are manufactured from cast and/or plate aluminum with all
internal parts corrosion-protected steel or aluminum.
The PT1250 Series and PT1280 Series are capable of auto/random scan operation with
the addition of the Pelco solid-state auto/random scan joystick control.
The PT1253R is equipped with variable frame scan capabilities (adjustable from 2-9
seconds) and interfaces with other manufacturers' control systems for frame scan operation. This pan/tilt can be used in place of the Vicon V390APT pan/tilt.
The PT1250EX/AMS meets the rigorous requirements for weather and dust-proof electrical
equipment for installations in salt-air environments.
Pan/tilts in the PT1260EX Series meet the rigorous requirements of explosion-proof and
dust-ignition-proof electrical equipment for installation and use in hazardous locations.
PT1260EX Series units are suitable for use in salty conditions such as aboard ships and on
sea coasts.
MODELS
PT1250 Series
PT1250PHeavy-duty, indoor/outdoor pan/tilt, 120 VAC
PT1250P/220Same as PT1250P except 230 VAC input
PT1250P/FGSame as PT1250P except supplied with high-speed gears (12°/6° per
PT1250P/FGPSame as PT1250P except supplied with special pan-speed gearing
PT1250P/HBSame as PT1250P except supplied with spot heaters in base, blanket
PT1250P/HB/FGCombination of PT1250P/HB and PT1250P/FG
PT1250P/PPSame as PT1250P except supplied with preset positioning option.
PT1250P/PP/WTSame as PT1250P/PP except white epoxy polyester powder coat finish
PT1250P/RADSame as PT1250P except supplied with radiation-resistant wiring and
PT1250DC Series
PT1250DCHeavy duty, indoor/outdoor pan/tilt, 115 VDC
PT1250DC/FGSame as PT1250DC except supplied with special high-speed gears
PT1250DC/HBSame as PT1250DC except supplied with spot heater in base, blanket
sec pan/tilt speed). Reduces load to 50 lb (22.68 kg)
(12°/sec pan speed)
heater in cover. Heaters are 120 VAC, 50/60 Hz, 230 watts total, and
allow operation to -50°F (-46°C)
Requires preset control or control with AZL option (position-indication
meter)
white epoxy paint. Low-level radiation resistancy
(12°/6° per second pan/tilt speed). Reduces total load rating to 50 lb
(22.68)
heater in cover, 120 VAC (230 watts total). Allows operation to
-50°F (-46°C)
Pelco Manual C373SM-A (8/01)5
PT1250DC/PPSame as PT1250DC except supplied with position feedback
modification. Requires preset control or control with AZL option (panel
readout meters)
PT1250DC/RADSame as PT1250DC except supplied with radiation resistant wiring and
PT1253R
PT1253RHeavy duty, indoor/outdoor pan/tilt, 120 VAC. Equipped with variable
PT1250EX/AMS
PT1250EX/AMSHeavy duty, indoor/outdoor pan/tilt, 120 VAC, Weather and dust-proof
PT1260EX Series
PT1260EXExplosion-proof, 120 VAC operation pan/tilt for loads up to 100 lb (45 kg).
PT1260EX/220Same as PT1260EX except 230 VAC operation
PT1260EX/PPSame as PT1260EX except supplied with preset position modification
PT1260EX/PP/230 Same as PT1260EX/PP except 230 VAC operation
PT1280 Series
PT1280PHeavy duty indoor/outdoor pan/tilt, 120 VAC
PT1208P/HBSame as PT1280P except supplied with spot heaters in base, blanket
white epoxy paint. Low level radiation resistant up to 106 rads
frame scan
construction for installation in salt-air environments.
(PP)
heater in cover, 230 watts total. 120 VAC, 50/60 Hz
PT1280P/PPSame as PT1280P except with presets
PT1280SLHeavy duty indoor/outdoor pan/tilt with SL option (360° pan rotation)
PT1280SL/PPSame as PT1280SL except with presets
FGP/1250PHigh speed gearing for pan: 12°/sec
FGT/1250PHigh speed gearing for tilt: 6°/sec tilt. Reduces load to 50 lb (22.68 kg)
SECSector scan modification allows pan/tilt to auto-scan and manually
HB/1250Spot heaters in base, blanket heater in cover. 230 watts total. 120
(22.68 kg)
(22.68 kg)
override in present sector (PT1280P)
VAC, 50/60Hz allows operation to -50°F (-45.56°C)
6Pelco Manual C373SM-A (8/01)
MAINTENANCE
Inspect the pan/tilt unit every six months to ensure trouble-free operation and an extended
product life. Harsh environments and/or continuous motion applications may require more
frequent maintenance.
Please read all of the instructions that follow before servicing the pan/tilt.
To begin, remove the three screws on the front of the pan/tilt housing and lift the cover to
gain access to the pan and tilt motor assemblies.
TIGHTENING DRIVE CHAINS
Check the pan and tilt drive chains for tension. A movement of 1/32 of an inch to 3/32 of an
inch in the chains is acceptable. If the movement of a chain exceeds 3/32 of an inch, adjust
the chain as follows:
1.Loosen the screws securing the motor to the mounting frame.
2.Pry on the motor to apply tension to the chain. Do not over-tension the drive chain.
3.Keep tension on the chain while tightening the screws.
CHAIN DRIVE LUBRICATION
Sprockets, chains, and gears should be well greased. If necessary, lubricate the pan and tilt
gears, sprockets, and chains as follows with a high-quality grease capable of withstanding
temperatures from -50° to 170°F (-46° to 77°C). Do the following:
1.Liberally apply grease to the pan and tilt gears, chains, and sprockets (refer to Figure 1).
2.Operate the pan and tilt motors to spread the grease across the parts.
3.Apply additional grease if necessary.
4.Reinstall the cover. If the pan/tilt is installed outdoors in an inverted position, apply
RTV silicone sealant as shown in Figure 2 (except PT1250EX/AMS and PT1260EX
Series).
Figure 1. Servicing the Pan/Tilt
Pelco Manual C373SM-A (8/01)7
RESETTING POTENTIOMETERS
IMPORTANT:
Be very
careful when resetting potentiometer switches. Be
sure that the pan/tilt has
been centered between
maximum pan and tilt travel,
regardless of the adjustable
limit stops. Failure to observe caution when resetting potentiometers could
result in damage to the
preset positioning ability of
the pan/tilt.
WARNING:
NEVER reposition
the pan fixed limit
stop. Doing so WILL DAMAGE the wiring harness
and, if the pan/tilt has preset
positioning, COULD cause
the pan potentiometer to
BREAK.
Models with Preset Positioning (PP)
Models with preset positioning (PP) use potentiometer switches that are factory set to the
full range of pan and tilt travel. Under normal operating conditions and at routine service
intervals they do not need adjusting.
Should your pan/tilt require any work on the drive mechanism other than routine maintenance, perform the following procedure to reset the potentiometers.
To begin, remove the cover to gain access to the pan and tilt motor assemblies.
1.Remove the potentiometer gears and position the pan/tilt to the middle of its maximum
pan and tilt travel, regardless of the position of the adjustable limit stops. That is, the
tilt table should be level and the fixed limit stop should be opposite the limit switch.
2.Turn a potentiometer all the way in
one direction until it stops, then
observing the number of turns, turn it
back the other way until it stops.
Rotate the potentiometer half the
number of turns the other way to
reach the center.
3.Replace the potentiometer gear.
4.Perform steps 2 and 3 for the other
potentiometer.
➛
➛
➛
WARNING
: The
knife-blade included in the brake
kit is very sharp. It should be
handled carefully and disposed of properly after use.
NOTE
: This section does
not apply to the PT1250DC
Series.
Figure 2. Sealant Locations
MOTOR BRAKE REPLACEMENT
To order replacement motor brakes, specify part number 1250BRAKE. The kit consists of
four springs, four Teflon pads, two screws, and a small knife-blade for removing the old
brake pads.
1.Remove the large rectangular heat sink from the back of the pan motor. Remove the
four springs. Do not disturb the silicone heat sink compound. It ensures the transfer of
heat to the heat sink and MUST be present when the heat sink is replaced.
2.Use the knife blade to remove the worn pads, as follows:
a.Insert the knife blade into the opening and press firmly into the brake pad.
b.Before trying to remove the brake pad, twist the knife-blade. This will loosen the
worn pad and make removal easier.
c.Gently twist the blade as you pull the worn pad out.
3.Insert the four new brake pads and four springs. Replace the heat sink using the new
screws.
Reinstall the cover. If your pan/tilt is installed outdoors in an inverted position, apply RTV
silicone sealant to the areas circled in Figure 2 (except PT1250EX/AMS and PT1260EX
Series).
8Pelco Manual C373SM-A (8/01)
EXPLODED ASSEMBLY DIAGRAMS
Figure 3. PT1250 Series Exploded Assembly Diagram (Mechanical Parts)
Pelco Manual C373SM-A (8/01)9
Table A. PT1250 Series Mechanical Parts List
ItemQtyDescriptionPart Number
11Gasket105010010
21Pan spindle nut10504017COMP
31Thrust cap (except WT, RAD models)10504076COMP
152Thrust collar10504085COMP
168Bearing washer10506005
174Bearing cage10506006
184Bearing10506007
192Gear train bracket12504079COMP
208Arbor shimZHSHIM.004
211Spindle base assembly (except WT, RAD models)12501041ACOMP
221Tilt shaft assembly12501043COMP
231Pan limit bracket12504100COMP
241Tilt limit bracket1554052COMP
254SwitchSWI1SM1
262Pan switch actuator with insulationSWIJS221
272Tilt switch actuator with insulationSWIJS138B
2819-pin terminal stripTRS2009
291Heat sink (except 220, RAD models)12504010ACOMP
302Spacer rod12504110COMP
311Pull-up bar (except WT, RAD models)12504111COMP
321Tilt table top (except WT , RAD models)12504116COMP
331Tilt table side (except WT, RAD models)12504117COMP
341Tilt table side (limit stops) (except WT, RAD models)12504118COMP
351Cover (except WT, RAD models)12504119BWA
361Pan limit pin12504120ACOMP
371Tilt limit pin12504121ACOMP
381Pan motor plate (except 220 model)12504123COMP
391Tilt motor plate (except 220 model)12504123TCOMP
401Pan motor sprocket (except 220, FG, FGP models)12504124COMP
411Tilt motor sprocket (except 220, FG models)12504125COMP
1Spindle base assembly (WT and RAD only)12501041AWCOMP
1Pull-up bar (WT and RAD only)12504111WCOMP
1Tilt table top (WT and RAD only)12504116WCOMP
1Tilt table side (WT and RAD only)12504117WCOMP
1Tilt table side (limit stops) (WT and RAD only)12504118WCOMP
1Cover (WT and RAD only)12504119WA
1Pan motor plate (220 only)12504220COMP
1Tilt motor plate (220 only)12504221COMP
1Pan motor sprocket (FG and FGP only)1504016 COMP
1Pan motor sprocket (220 only)12504226COMP
1Tilt motor sprocket (220 only)28012011
1Tilt motor sprocket (FG only)12504124COMP
Continued on next page
10Pelco Manual C373SM-A (8/01)
Table A. PT1250 Series Mechanical Parts List (Continued)
471Side plate, tilt side (except WT , RAD models)12504115COMP
481Side plate, pan side (except WT, RAD models)12504114ACOMP
492Tilt limit stop1554055COMP
5017-pin male connector (RAD model)MS3102E16S1P
51Not used
527Gasket, 1/8" x 1/2" x feet (except FG, FGP models)EH550010030
53Not used
543Pan limit stop58010006
55Not used
56Not used