Wiring The Contact/Tally Connectors - Extron electronics IN1804 Series User Manual

NOTE: When using shielded twisted pair cable in bundles or conduits, consider the
following:
• Do not exceed 40% fill capacity in conduits.
• Do not comb the cable for the first 20 meters, where cables are straightened,
aligned, and secured in tight bundles.
• Loosely place cables and limit the use of tie wraps or hook-and-loop fasteners.
• Separate twisted pair cables from AC power cables.

Wiring the Contact/Tally Connectors

The CONTACT/TALLY portion of the rear panel on all models contains seven sets of contact
and tally captive screw connectors (numbered 1 through 7), each with two pins labeled
C and T, for contact closure and tally indicator devices. The CONTACT/TALLY panel also
contains a 2-pole captive screw connector with a G (ground) pin and a +V pin that provides
+5 VDC power to the indicator devices connected to the tally (T) ports.
These ports can be used for triggering and feedback associated with the selected input,
for contact-based input switching, and for other triggered functions such as CEC display
control or video mute. Contact/Tally ports are typically used with Extron Show Me (SM)
cables or with external equipment (such as the Extron CCB 30) to control IN1804 functions,
depending on which Contact/Tally port is used.
1
C T
Figure 14.
• Contact/Tally ports 1 through 4 — (See figure 14,
connector is labeled with the number of the video input associated with it. Wire a
push button or other contact closure switch to pin C (Contact) and to the shared pin G
(ground,
If using a tally indicator, connect the indicator device to the shared +V pin (5 VDC,
•
required for tally devices without a power supply,
In other words, the V+ pin of the switcher connects to the voltage in (anode) of
the indicator, and the T pin connects to the tally output (cathode) of the indicator
device.
NOTE: If the indicator has an internal power supply, it is not necessary to
If using an SM cable, see
•
• Ports 5 through 7 (configurable via PCS) — (
contact closure switch to pin C and to the shared pin G. If using a tally indicator, connect
the indicator device to the shared +V pin and the T pin.
See the IN1804 Series Help File for instructions on configuring these ports using PCS.
2 3 4 5
C T C T C T C T
1 1 1
Contact/Tally Panel
).
3
connect it to the V+ pin. It can be connected directly to the T pin of the
Contact/Tally input connector.
Connecting Using an SM Cable
IN1804 Seamless Scaling Switchers • Installation
6 7
C T C T G V+
2 2 2 3 3 3 4 4 4
) Each CONTACT/TALLY
1
) and the T (Tally) pin.
4
on the next page.
) Wire a push button or other
2
19