66250457-EN - V 3.4 - 31/08/16
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VK4K/6256 Series “6 wire Bus” videokit
VK4K/6256 Series - Installation handbook
Art. 6256
3.5" colour videophone
SIGNALS ON CONNECTION BOARD
+V
20Vdc Input/Output (As input 16÷20Vdc 0,5A – as output 20Vdc 0,5A max)
–
Ground reference for +V terminal.
1
Speech line output from handset’s microphone and data signal (Approx. 12V in stand-by, 5V during a conversation)
2
Speech line input toward the handset’s loudspeaker (Approx. 12V in stand- by, approx. 3V during a conversation)
V1
Balanced video signal 1 sync.-
V2
Balanced video signal 2 sync.+
24Vac 1A max power input
LB
Local call input (5V in standby, 0V to trigger)
SB
Service button (open collector) active low output. The button goes active when the button is pressed (Open Collec-
tor 24Vdc 100mA max)
LD
12Vdc input for door-open LED
2A
Speech line input toward the loudspeaker of the parallel telephone (Approx. 12V in stand-by, 3V during a conversation)
3A
Output switched ground for parallel telephone
4A
Output call tone for parallel telephone
5A
Input for door-open command from parallel telephone
TECHNICAL SPECIFICATION
Power Supply:
Supplied by the BUS line, 20Vdc
Power consumption:
Stand-by: 50mA Max
Operating: 200mA Max
Working Temperature: -10 +50 °C
