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6
Introduction
CyberDome Series Installation Manual
A06-8SG0/B/April2006/1033921C
Cable Requirements
For operation, CyberDomes require video, power and data cables as described below:
1) The video cable carries the video signal to the remote viewing site. If sending video via
coaxial cable, a 75-ohm coaxial cable is typically used. If sending video via twisted-pair
cable, an unshielded, 22 gauge (0.64 mm) twisted-pair cable is needed.
2) The 24VAC cable powers the CyberDome and the camera. To determine cable size, refer
to the
Power Cable Size and Length
subsection of the
Introduction
.
3) The RS422 control cable carries commands from the Digiplex keypad to the CyberDome.
An unshielded, two-conductor, twisted-pair cable is required. Recommended cable size
is 22 gauge (0.64 mm).
NOTE: When using the UTP interface modules, the unshielded twisted-pair video and RS422 control
wires can share the same wire jacket, but must remain as separate twisted pairs.
Power Requirements
CAUTION!
For optimal video performance, all CyberDomes must be powered from an
isolated
24 VAC power
source—fused outputs are
not
adequate. Allowable voltage range is 20 to 28 volts.
All domes require a 24VAC power supply that provides isolated outputs to operate the domes’
pan/tilt drive, camera, and optional heater/fan (E Option). The total power requirement varies
depending on the model of the CyberDome.
Dome power requirements (at 24 VAC):
•
All domes without a heater/fan require 16 VA
•
7-inch domes with heater/fan require 51 VA
•
Heavy-duty domes with heater/fan require 68 VA.
Power Cable Size and Length
It is important to choose the proper gauge of the cable that supplies 24 volts to the CyberDome.
An inadequate gauge will cause a voltage drop resulting in improper operation.
Table 1 gives the recommended cable lengths of varying wire gauges for a CyberDome with a
color camera. Note that the heater and fan (E Option) reduces maximum cable length sub-
stantially.
Table 1. Recommended maximum cable lengths.
Maximum Cable Length
Wire Gauge
All Domes
without Heater/Fan
(16VA)
7-inch Domes
with Heater/Fan
(51VA)
Heavy-duty Domes
with Heater/Fan
(91VA)
(awg)
(mm
2
)
Feet
Meters
Feet
Meters
Feet
Meters
10
2.60
3000
915
900
274
630
192
12
2.05
1900
580
570
174
400
122
14
1.62
1200
365
360
110
250
76
16
1.29
750
230
230
70
160
49
18
1.02
465
142
145
44
100
30
20
0.81
290
90
90
27
62
19
22
0.64
185
56
60
18
40
12
Содержание CyberDome Series
Страница 1: ...CyberDome Series Installation Manual ...
Страница 36: ...PTZ and Dome Installation CyberDome Series Installation Manual 36 A06 8SG0 B April2006 1033921C ...
Страница 44: ...Appendix A Accessory Installation CyberDome Series Installation Manual 44 A06 8SG0 B April2006 1033921C ...
Страница 46: ...Appendix B Handling Mirrored Domes CyberDome Series Installation Manual 46 A06 8SG0 B April2006 1033921C ...