IMP-400UHD User Guide
23
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Controlling Tally output
In order to illuminate the LED of the selected input channel selection key, form the circuit as follows.
5V
IN1 T
IN2 T
IN3 T
IN4 T
OFF T
IMP-400UHD
300
Ω
5V OUT
1-pin
Internal current-limiting resistor is used
5V
IN1 T
IN2 T
IN3 T
IN4 T
OFF T
IMP-400UHD
500mA
5V OUT
3-pin
Another current-limiting resistor is used
[Fig. 6.6] Tally output circuit example
Notes:
・
Keep unused contact input terminals open.
・
Before using DC 5 V output and current-limiting resistor, check the specification of the LED.
・
The maximum load capacity of Tally output is DC 48 V 1 A.
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Cabling (Contact input/Tally output connector)
Attach a cable to the provided 3-pin terminal block and connect it to a Contact input/Tally output connectors.
AWG28 to AWG16 conductor gauge is recommended for optimal performance.
The recommended wire strip length is 0.28 in. (7 mm).
C
G
T
Contact input
Tally output
GND
Up to 0.28 in. (7 mm)
[Fig. 6.7] Connecting contact input/Tally output cable to 3-pin Terminal block