Manual

CyberDome II
Installation Manual
6
Cable requirements
Table 3 lists the requirements for the cables that connect to the dome.
Note: When using UTP cable for video and data, the wires can share the same jacket but must remain separate twisted pairs.
Power cable size and length requirements
Using the proper gauge of power cable will ensure proper operation and avoid voltage drops. See Table 4 for
the recommended cable gauge for varying maximum cable lengths and power draws.
Table 3. Cable requirements
Operation Cable requirement
Length
feet meters
Data For RS-422: 22 gauge (0.64 mm) unshielded, two-conductor, twisted-pair (UTP)
cable
10,000 3,000
For RS-485: 22 gauge (0.64 mm) shielded, two-conductor, twisted-pair (STP) cable 3,000 900
Video 75 ohm coaxial cable (RG59 with lift/gain) 1,600 486
22 gauge (0.64 mm) unshielded, two-conductor, twisted-pair (UTP) cable
Note: Use only crimp-on BNC connectors. Do not use screw-on connectors.
1,250 381
Alarm Cat-5 cable (recommended) 1,250 381
Relay contacts Cat-5 cable (recommended). Contacts rated for 60 W DC, 62.5 W AC with 2 A max. 1,250 381
Power 24 VAC cable. To determine the size of cable needed for individual applications, see Power cable size and
length requirements.
Table 4. Recommended power cable gauges based on maximum lengths for an operating voltage of 24 VAC (±4 VAC)
Wire gauge Domes with fan (20 VA)
Domes with
12 W heater/fan (x2) (45 VA)
HD domes with
23 W heater/fan (x2) (66 VA)
AWG mm (dia.) feet meters feet meters feet meters
10 2.60 1569 478 784 238 490 149
12 2.05 988 301 494 150 309 94
14 1.62 620 188 310 94 194 59
16 1.29 391 119 196 59 122 37
18 1.02 246 74 123 37 77 23
WARNING: Be aware that the power requirements for CyberDome II and CyberDome are different, which may require
new cabling when replacing CyberDomes with CyberDome II domes.