Alarm Inputs And Output (Accessory Output); Alarm Inputs; Alarm Output; Video Loss Output - Philips LTC 2272-Serie Installationsanleitung

4.7 Alarm Inputs and Output
(Accessory Output)
For LTC 2276 Series: One 150 mm (6 in) cable, with a 15 pin
connector at one end (supplied with the VidQuad
connecting external devices such as alarm inputs and outputs,
and accessories.
4.8

Alarm Inputs

LTC 2276 Series only: The alarm inputs are configured to be
normally open.
CAUTION: Do not apply external voltages to the
alarm inputs.
Use only isolated closures or open collector logic. Precautions
should be taken, particularly on long runs, to prevent pickup of
spurious signals from associated wiring which may give false
inputs or damage the unit.
4.9

Alarm Output

LTC 2276 Series only: The alarm output is a relay which is
configured to be normally open. The relay contacts can handle
up to 0.5 amperes at 20 volts AC/DC (up to 36 volts peak
voltage from either pin of relay to ground), and a maximum
resistive load of 10 VA.

4.10 Video Loss Output

LTC 2276 Series only: The video loss output is a logic level
output that is active low on video loss. Refer to PINOUTS -
Alarm/Accessory illustration.

4.11 Remote Control Inputs

LTC 2276 Series only: Remote control contact closure inputs
are provided to mimic the operation of the following front
panel buttons: QUAD, FULL VIEW 1, FULL VIEW 2, FULL
VIEW 3, FULL VIEW 4, and SEQUENCE. Refer to Pinouts
Alarm/Accessory illustration.

4.12 Connections

The following connections should be made prior to applying
power to the unit:
1. Connect the appropriate video signals to inputs labeled
CAM 1 through 4.
2. LTC 2272 Series: Connect the main monitor to the QUAD
VIDEO OUT output. See Typical Application - LTC 2272
Series illustration.
LTC 2276 Series: Connect the main monitor to the
VIDEO OUT output, and the second monitor to the
QUAD VIDEO OUT output. See Typical Application -
LTC 2276 Series illustration.
3. Plug the power cord into an AC power source.
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5
5.1
When power is applied to the unit, the ON LED lights, and the
®
unit), is for main monitor displays four quadrants on the screen
corresponding to the four video inputs.
See Front Panel - LTC 2272 Series and Typical Application -
LTC 2272 Series illustrations.
5.2
When power is applied to the unit, both the QUAD VIDEO
OUT and the VIDEO OUT monitors will be in the quad
display mode.
NOTE: Upon power-up and upon any system reset, the
system's software revision and the unit's model number will be
reported in two separate screens.
Other advisory messages may occur dependent upon various
conditions, such as VIDEOLOSS, ALARM, FRZ, and OLD
FRZ.
See Front Panel - LTC 2276 Series and Typical Application -
LTC 2276 Series illustrations.
5.2.1
SEQUENCE: Enables the sequence operation.
QUAD: Displays the quad video screen (four separate cameras
in one screen).
FULL VIEW: Used to select one of the four video inputs and
display it in a live full screen mode.
FREEZE: Used to digitally freeze and unfreeze the
corresponding quadrant of the quad screen.
5.2.2
Sequence Mode
When the SEQUENCE key is pressed, the VIDEO OUT
monitor shall start the sequence between the four video inputs,
and the QUAD screen with a 2 second dwell time. See Quad
Sequence Enable. The on-screen text SEQ will be displayed at
the bottom center of the screen. The FULL VIEW LED above
the video that is currently being displayed, or the QUAD LED
if the quad screen is being displayed, will light. There will be
no change to the QUAD VIDEO OUT monitor display during
normal sequence operation.
The following keys are functional for the sequence mode:
SEQUENCE will stop and start the sequence operation.
QUAD will stop the sequencing and switch the VIDEO OUT
monitor to the Quad Screen Mode.
FULL VIEW will stop the sequencing and switch the VIDEO
OUT monitor to the full screen display of the corresponding
video input.
1.4

OPERATION

LTC 2272 Series

LTC 2276 Series

Front Panel Controls
Operating Modes