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Contact closure input and tally output ports — (Optional) To enable control via
F
contact closure, wire a push-button contact closure device to a C (contact) pin of one of
the contact/tally connectors and to a G (ground) pin. To identify the currently selected
input when the front panel buttons are not visible (if desired), connect an indicator
device, such as an LED, to tally output pin T next to the connected Contact pin.
NOTES:
•
Contact closure control overrides front panel input selections.
•
For contact closure control, auto-switch mode must be off (see
Input
on page 19).
The contact/tally panel (labeled CONT) contains
two rows of contact and tally connectors (see the
image at right):
•
Bottom row — Contains:
Contact inputs 1 and 2 — One 5-pole
1
captive screw connector containing two
pairs of pins labeled C (contact) and T
(tally).
The 5-pole connector also contains a +V
pin, which supplies power to optional tally
indicator devices such as LEDs that are
connected to contact inputs.
Contact inputs 3 and 4 — One 4-pole captive screw connector with two
3
more C
T pin pairs.
-
G pin — A ground pin, located on the 3-pole Remote RS-232 connector.
4
You can connect a contact closure device to this pin and to a C pin of any
contact/tally input.
Top row — Contains two 4-pole captive screw connectors, each containing a
•
contact pin, a ground pin, a tally pin, and a
connected tally indicator devices.
Contact input 5
5
Contact input 6
6
Wiring the Contact/Tally Connectors
See
connecting contact closure and tally indicator devices to the contact/tally ports.
Remote RS-232 connector — Use this 3-pole, 3.5 mm captive screw connector for
G
RS-232 communication with the switcher (including firmware updates).
To enable RS-232 control, connect the
to the serial port of your computer or control system (see
on page 12).
SEND POWER
OFF
CONT
1
2
3
C
T C T
+V
C T C T
1 1 1
2 2
3 3 3
pin that can be used to power
+V
on page 13 for information on
(transmit), Rx (receive) and G (ground) pins
Tx
Wiring for RS-232 Control
DTP2 T 204 Switcher • Installation
Selecting an
5 5 5
6 6 6
5
6
C
G
T
+V
C
G
T
+V
REMOTE
4
RS-232
Tx
Rx
G
4 4 4
8
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