Extron electronics HC 400 Series User Manual page 30

Push-button keypad
You can connect an external push-button keypad to these ports. Extron offers a variety of
button panels such as the CCR Series products, but you can use any push-button switch or
keypad of your choice.
NOTE: The Extron CCR-4BLB AAP
closure connection and its own power connection. The tally connections are not
needed. Other devices might use both contact and tally connections.
1. Make contact closure connections, as shown
at right and lower right. Wire a male 4-pole captive
screw connector as follows and plug it into the
Contact connector:
Contact closure input (2, 3, or 4) pins — Insert
•
the contact connections to these pins as desired.
Momentary closure of one of these pins to ground
selects the corresponding input (2, 3, or 4).
Selection is triggered at the closure (grounding) of
the pin, not the opening.
Ground (G) — Insert ground wire to this pin.
•
2. Make tally output connections, as shown
at right. To identify the currently
selected input when the front panel
buttons are not visible, connect a
device such as an LED light
to the Tally connector 2, 3, or 4 pin
and the +V pin. When an input is
selected (by keypad or front panel),
the corresponding tally out pin is
set to logic low, which completes a
circuit and sends power (+5 VDC) to
the connected LED.
Wire a 4-pole captive screw
connector as follows and plug it into
the Tally connector:
Tally output (2, 3, or 4) —
•
Insert connections to these
pins as desired to control the
LEDs for in the contact closure
push-buttons. When an input is
selected, the LED for that input
is active.
Voltage (V+) — Insert the
•
power wire for the contact
indicator device into the
opening for the +V pin. Some LEDs require a resistor connected in series at this pin,
so see the documentation from the manufacturer to determine what to use for your
device.
3. To test the connections, power on the system, then press the button on the keypad
to switch the connected input to the output after the system is powered on. The input
selection should change and the corresponding button should light.
contact closure remote requires only the contact
REMOTE
CONTACT TALLY
2 3 4 G 2 3 4 +V
G Ground
4
Contact
3
2
Contact Closure
HC 400 Series • Hardware Features and Installation
REMOTE
CONTACT
G 2 3
HCT 102 D
Rear/Side
Panel
Contact Closure
3
Contact
Contact
2
Contact
Closure
G
Ground
Switch
NOTE: Some LEDs
HCT 103
require a resistor
Rear
Panel
connected in series
at the V+ pin.
Extron CCR Series
button panels do
not. See the
requirements from
the manufacturer
of the button panel
or LEDs you plan
to use.
Voltage
5 V 12 V 24 V
Resistor N/A 4.52 K 13 K
Rating
(ohms)
Tally
+V
Voltage
Indicator
4
Tally out
(LED)
3
2
Tally Output
Contact
Closure
Switch
22