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C561M-H (3/08) 7
CABLE CONNECTIONS AND REQUIREMENTS
The following are the recommended maximum distances to wire the WCS1-4 to a Spectra or Esprit
positioning system.
To determine the correct voltage tap:
1. Pick the unit type.
2. Find the wire gauge used (22 gauge is not recommended).
Determine which secondary output tap (A, B, or C) is appropriate for the distance between the dome or
positioning system and the WCS1-4. Distance is in feet (meters).
Maintenance
There are no user-serviceable parts except for the fuse. If the transformer in the WCS1-4 does not work
properly, the entire environmental power supply needs to be returned to the factory for repair. Refer to
Warranty and Return Information located on the inside back cover of this manual for instructions on
returning the WCS1-4.
Clean the outer surface of the WCS1-4 box with a nonabrasive cleaning cloth and antistatic cleaner.
Do not use kerosene or similar substances that may damage the surface.
Table A. Maximum Wiring Distance From Transformer to Load
Power Consumption
(25 VA)
20 AWG
(0.5 mm
2
)
18 AWG
(1.0 mm
2
)
16 AWG
(1.5 mm
2
)
14 AWG
(2.5 mm
2
)
12 AWG
(4.0 mm
2
)
Tap A (24 VAC) 113 (34) 180 (55) 287 (87) 455 (139) 725 (221)
Tap B (26 VAC) 133 (40) 212 (64) 337 (103) 536 (163) 852 (260)
Tap C (28 VAC) 155 (47) 246 (75) 392 (119) 623 (190) 990 (302)
Power Consumption
(50 VA)
20 AWG
(0.5 mm
2
)
18 AWG
(1.0 mm
2
)
16 AWG
(1.5 mm
2
)
14 AWG
(2.5 mm
2
)
12 AWG
(4.0 mm
2
)
Tap A (24 VAC) 56 (17) 90 (27) 143 (43) 228 (69) 362 (110)
Tap B (26 VAC) 66 (20) 105 (32) 168 (51) 268 (81) 425 (129)
Tap C (28 VAC) 77 (23) 122 (37) 195 (59) 311 (94) 493 (150)
Power Consumption
(70 VA)
20 AWG
(0.5 mm
2
)
18 AWG
(1.0 mm
2
)
16 AWG
(1.5 mm
2
)
14 AWG
(2.5 mm
2
)
12 AWG
(4.0 mm
2
)
Tap A (24 VAC) 41 (12) 64 (19) 102 (31) 163 (50) 259 (79)
Tap B (26 VAC) 49 (15) 78 (24) 124 (38) 198 (60) 315 (96)
Tap C (28 VAC) 55 (17) 88 (27) 135 (41) 222 (68) 353 (107)