ORBIT FR EL, AZ Positioners: Medium Duty - Manual (Page 2)

62
Specifi cations - Legacy Series EL/AZ Positioners Medium Duty
Parameter Units
Positioner Model
AL- 4271-1 AL- 4272-1 AL- 4273-1 AL- 4274-1 AL- 4275-1 AL- 4275-1SP
Outline Dimension Drawing Number 10-0445 09-1220 10-1936 10-1822 10-1823 19-6292
Technical Notes 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3
Operational
Bending Moment
ft-lbs 600 2,000 4,200 7,500 12,000 12,000
kg-m 80 280 580 1,040 1,660 1,660
Vertical Load
lbs 1,000 1,250 3,000 5,000 10,000 10,000
kg 450 570 1,360 2,270 4,540 4,540
Delivered Torque
Azimuth
ft-lbs 500 500 1,200 1,200 2,800 10,000
kg-m 70 70 170 170 390 1,380
Elevation
ft-lbs 500 1,200 2,800 5,000 10,000 10,000
kg-m 70 170 390 690 1,380 1,380
Withstand Torque
Azimuth
ft-lbs 600 600 2,000 2,000 4,200 12,000
kg-m 80 80 280 280 580 1,660
Elevation
ft-lbs 600 2,000 4,200 7,500 12,000 12,000
kg-m 80 280 580 1,040 1,660 1,660
Drive Power
Azimuth hp 1/3 3/4 3/4 3/4 3/4 3/4
Elevation hp 1/3 1/3 3/4 3/4 3/4 3/4
Nominal Speed
Azimuth rpm 1.5 1.3 1.3 1.3 0.5 0.9
Elevation deg/min 540 470 180 110 55 54
Standard Angle
Transducer Format Dual Speed
Synchro Dual Speed
Synchro Dual Speed
Synchro Dual Speed
Synchro Dual Speed
Synchro Dual Speed
Synchro
Standard
Accuracy Azimuth deg ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03
Elevation deg ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03
Maximum
Backlash
Azimuth deg 0.05 0.05 0.05 0.05 0.05 0.05
Elevation deg 0.05 0.05 0.05 0.05 0.05 0.05
Elevation Limit-to-Limit Travel deg ± 95 ± 95 ± 95 ± 95 ± 95 ± 95
Lower Azimuth Moment Bearing
Capacity (static) ft-lbs 3,000 10,000 22,000 22,000 35,000 35,000
kg-m 415 1,380 3,040 3,040 4,840 4,840
Physical
Height at 0° Elevation
in 39.4 40.7 46.5 46.9 49.8 53.8
mm 1,000 1,033 1,182 1,190 1,264 1,367
Weight
lbs 510 630 950 1,150 1,350 1,430
kg 231 286 431 522 612 649
Platform Size
in 12.6 x 13.3 24 x 24 24 x 24 28 x 28 28 x 28 28 x 28
mm 320 x 339 610 x 610 610 x 610 711 x 711 711 x 711 711 x 711
Environmental
Operating Temperature - 4° F to 140° F (- 20° C to 60° C)