Wiring
The types of wires that need to be installed are power, video, control, auxiliary outputs and alarm inputs. All
wiring cables enter the Housing through the top hole via the Cable Access Cap, Vicon mount or 1.5-inch-
Pipe, depending upon the mounting method used. Refer to the Technical Information section for all electrical
requirements.
Power cables carry 24 VAC power and are usually a two-conductor type ranging in size from 20 to 12 AWG.
The power source should be a Class 2 indoor/dry or Class 3 outdoor/ wet rated type. The leads should be
connected to Terminal Block 2 (TB2), pin 1 [H - (hot)] and pin 2 [N - (neutral)]. Also, connect an 18 AWG wire
from TB1-8 (SHLD) to a solid earth ground (ex. water pipe). The size of the two-conductor cable depends on
indoor/outdoor application and cable distance as shown in the Technical Information Section.
Video cables carry the composite video signal and uses coaxial cable. The type of cable depends on the
cable distance as shown in the Reference Section. In Vicoax mode the video signal also carries the Control
signals.
Control cables carry RS-422 format digital signals and require individually-shielded twisted-pair sets. The
type of cable depends on the cable distance and number of wire pairs within a cable as shown in the
Technical Reference Section. There can be a maximum of four Control cables (twisted-pair sets), depending
on the mode selected, Simplex or Half-Duplex or chained through the Mini Dome. The Mini Dome has the
capability of being “daisy chained” to any other RS-422 format device, including another Mini Dome. It can
receive the signal and retransmit it to another device. See Table 3 below.
Note
: If the Surveyor is not being connected in a daisy chain fashion, place a short jumper wire between TB1-
8 (SHLD) and TB1-10 (RIN-).
COMMAND IN (CIN):
A signal from the CPU that causes some function to occur in the Mini Dome.
RESPONSE OUT (RO):
A signal from the Mini Dome to the CPU in response to a COMMAND IN signal or
triggered by an alarm input.
COMMAND OUT (CO):
A signal from the CPU that is received and retransmitted by the Mini Dome to
another RS-422 device.
RESPONSE IN (RIN):
A signal from another RS-422 device received and retransmitted by the Mini Dome to
the CPU.
Communication mode
Command In (CIN)
Response Out (RO) Command Out (CO)
Response In (RI)
Simplex
X
Half Duplex
X
X
Simplex, Chained
X
X
Half Duplex, Chained
X
X
X
X
Table 3
Required Control Signals for Specific Communication Modes
X971 Rev 1098 Surveyor Mini Dome System
Wiring
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Summary of Contents for surveyor X971
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Page 46: ...NOTES 32 Shipping Instructions X971 Rev 1098 Surveyor Mini Dome System ...
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