DS1092-090
57
CONNECTIONS
Connect the provided cable to the dome using terminal blocks.
Connect the second end of the cable to the video device, using the BNC male connector.
Connect the two wires of RS485 with a terminal block or welding them to the keypad (Ref. 1092/620)
wiring junction box, observing polarity: (positive) - YELLOW – (negative).
Connect the two power supply wires with the terminal block or welding them to the wires of the provided
power supply unit (it is not necessary to observe polarity).
If the dome is the last device of RS485 line (see
RS485 LINE LOGIC CONNECTION
),
connect a
120
Ohm ¼ w
resistor, not provided, in parallel to the RS485 line.
Make connections as shown in
“CONNECTIONS DETAILS”
.
Connect the power supply unit to the mains.
CONFIGURATION
RS485 LINE LOGIC CONFIGURATION.
Figure 2: BASIC CONFIGURATION
Note
If several Domes are connected, it is suggested to use a cascade configuration, with “in/out” connections on
each device. However, the sum of the lengths of the single segments of the RS485 line must not exceed
1200m.
Remember to always connect the termination resistor on the last Dome of the line.
Connect the resistor
Connection cable
RS485
COAX
Dome power
supply
IF THE DEVICE IS THE LAST OF THE
LINE, CONNECT A 120 OHM ¼ W
RESISTOR
KEYPAD
TERMINATION
JUNTION BOX
DOME
Summary of Contents for THERA 5 Ref.1092/602
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