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CONNECTIONS AND OPERATION
Control Code Line Connections
In switching systems using Contol Code, the Switcher Follower
must be connected to the code line that contains the cameras
and monitor to be followed. Each code line contains data for
64 cameras and eight monitors for 1650 systems, and a
maiximum of 32 cameras and five monitors for 2150 systems.
The Control Code line connections to the Switcher Follower
must be shielded, 2-wire twisted pair (Belden 8760; for
plenum use Belden 88760 or equivalent).
Code Lines are NEC Class 2, low voltage circuits. Where
local codes permit, installation in conduit is not required.
Avoid installation near high voltage or other potential
interference sources.
Multiple 2031s can be connected in a "Star" configuration to
a Control Code distribution unit (1691 or 2091). See Figure 7.
For this connections, each 2031 must have a 120 ohm
termination.
A maximum of three Control Code devices can be "Daisy-
Chained" on a single code line. When devices are daisy-
chained, do not terminate the control line with intermediate
devices. In addition, make sure the intermediate equipment
does not contain a 120 ohm terminating resistor. If it does,
remove it (see page 5). See Figure 8 for a daisy-chained
configuration.
2031
2 0 3 2
B W S
T
CODE
DISTRIBUTOR
T = 120 OHM TERMINATION
Figure 7 - Code "Star" Configuration"
Figure 4 - DIP Switch Location on PCB
2031
2031
2 0 3 2
2 0 3 2
B W S
B W S
T
T
OTHER CODE
LINES
2 0 3 2
2031
B W S
CODE
DISTRIBUTOR
T = 120 OHM TERMINATION
Figure 8 - Code "Daisy Chain" Configuration
OPERATION
After completing the Control Input connections, plug in the
power cord. When the 2031 receives a valid code through the
Control Line input, the green Data Line LED illuminates. The
illumination of the Data Line LED is confirmation that the
relays associated with a particular monitor or camera are
opening and closing as each particular monitor or camera is
called.
For 1650A operation, there can be a maximum of four control
lines. The first control line is for monitors 1-8 and cameras 1-
64. The second control line is for monitors 1-8 and cameras
65-128. The third control line is for monitors 9-16 and
cameras 1-64. The fourth control line is for monitors 9-16 and
cameras 65-128.
When setting the DIP switches, enter the actual monitor and
camera group (i.e., monitor 12, cameras 1-64, GROUP 1;
contacts for cameras 1-16).
If the DATA LINE LED does not illuminate, check for
proper operation of the 1995. 1996, or 1024 CPU. Check all
your connections. If all the connections are as they should be
and the 2031 still does not operate properly, unplug the 2031
and remove the top cover. Check the DIP switch on the main
printed circuit board. All switches should be in the OFF
position. Refer to the illustration on page 5 for this DIP
switch location.
If the green code LED is flickering, the code lines may be
backwards. Try reversing the black and white code lines.
In operation with 1650A, 1995, 1996, and 1024 systems, the
2031 senses jumps between groups of 64 cameras. When
going from one group to another, the 2031 will place one
group in the OFF state (open all relays) when going to the
next group of 64 cameras.
6
2031
2 0 3 2
2031
2 0 3 2
B W S
B W S
T
OTHER CODE
LINES
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