WTI SW720-H.264-SD, Руководство по эксплуатации

Страница: 19 / 27

SIGNAL DESCRIPTIONS
AC LINE CONNECTIONS
The AC Line connections should be connected to an AC mains source with a voltage of
85VAC to 265V AC, operating at a frequency of 47Hz to 63Hz. The nominal operating
voltage is normally 115VAC or 230VAC. The camera draws 50 Watts maximum, which
translates to about 0.6 Amps at the worst case low line voltage of 85VAC.
24VAC POWER CONNECTIONS
The 24VAC power connections require the use of heavier gauge wiring and shorter cable
lengths than the 120VAC power option, as the 24VAC camera model draws
approximately 5 times as much current through the cable wiring, due to the reduced
operating voltage. Four power connection terminals are provided on the MS connector to
allow paralleled power wiring. Cable runs of up to 150 feet require paralleled #20 AWG
wiring (equivalent to #17 AWG) for reliable operation. Longer runs should use
correspondingly larger wire gauges to minimize voltage drop along the cables. Runs of
300 feet can use #14 AWG wiring and runs of 500 feet can use #10 AWG or #12 AWG
wiring.
ETHERNET SIGNAL CONNECTIONS
The Ethernet signals should be connected using a CAT-5e or CAT-6 cable. If the legacy
serial data control port is to be used, the Ethernet cable should be the shielded type and
the Ethernet cable shield should be connected to the data shield signal.
ANALOG VIDEO CONNECTIONS
An NTSC standard definition video signal output provides a 1Vpp NTSC video signal
with a 75 Ohm drive impedance on Pins L and A of the 18 pin MS connector (see wiring
chart).
HARD WIRED PTZ SERIAL CONTROL PORT
A secondary hard wired RS-485 port is provided on the SW720-H264-SD camera for
PTZ and other camera control functions. These signals can be conveniently accessed at
the cabinet end of the customer installed control cable by using the WTI RJ-45 Serial
Data Breakout Box.
There are internal 120 Ohm termination resistors for both the TX and RX signal pairs.
The factory shipped default state for the 120 Ohm terminations is for both the TX and RX
terminations to be enabled. Applications that involve multiple cameras on the same RS-
485 communications lines will require that the terminations on all cameras but one be
turned off.
SW720-H.264-SD WTI ~ Page 19 of 27