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Ports 4 and 5 (see figure 8,
•
configured as follows via PCS:
None — contact events broadcast unsolicited SIS responses for action via an
•
external control system. Tally ports are configured via external control system.
•
Single switch — Individual contact input triggers user-defined events (such as
Volume Up), along with an optional repeat rate for press and hold actions (such as
ramping volume up several steps). The Tally illuminates when the contact port is
closed.
Toggle switch — Individual contact input toggles between two sets of
•
user-defined events (such as mute and unmute). The Tally illuminates when the
contact port is closed.
•
Group switch — pairs two contact inputs to act as a mutually exclusive pair, which
trigger events such as system on vs. system off. Tally on the last activated contact
remains illuminated.
•
+V connector — The +V pin constantly outputs +5 VDC power with 200 mA total
(shared between pins). Use this pin when power is needed for external Tally LEDs, such
as those on the Extron CCB 30 contact closure remote.
1.
Wire and connect provided 2-pole plugs to the CONTACT/TALLY connectors 1 through
5 as desired (see figure 8,
2.
Connect contact input and tally output devices to the pin pair for each input:
•
To enable input switching via contact closure, connect a push-button contact
closure input device to pin C of the desired contact port, and to the G (ground) pin
(
4
•
To identify the currently selected input when the front panel buttons are not visible,
connect an indicator device, such as an LED, to tally output pin T of the same pair
of pins.
When the input being used is selected, the corresponding Tally pin shorts to
ground, which activates the connected indicator.
Insert the power wires for the contact indicator devices into the +V connector (
3.
4.
Press the button on the contact closure device to switch the connected input to the
output.
Connecting Using an SM Cable
The CONTACT/TALLY connectors can also be used with Extron SM cables. Figure 9 shows
how to wire an SM cable to a contact/tally input.
1
C
T
Red
Figure 9.
on the previous page) — These contact ports can be
2
and
1
2
).
Black
SM
Cable
SM Cable Connecting Contact and Tally Ports
).
UCS 303 • Installation
).
3
12
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