66550070-EN - V6.5 - 15/06/21
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ESVK/KRV782 Series “2 wire Bus” videokit
ESVK/KRV782 Series - Installation handbook
CONNECTION TERMINAL SIGNALS
AL
Alarm input (not implemented yet)
LB
Local bell input (active low)
LB_AL Ground output for use in combination with AL & LB
active low inputs
DOL
Auxiliary LED power supply input (+12Vdc – nor-
mally used as “DOOR OPEN” LED)
C
Dry contacts relay common contact
(during a conversation, keep pressed
the
button for more than 3 sec-
onds to enable the internal link be-
tween terminals C and NO – the link
remains until the button is released).
Max
50Vdc @
100mA
NO
Dry contacts relay normally open
contact (during a conversation, keep
pressed the
button for more than
3 seconds to enable the internal link
between terminals C and NO – the link
remains until the button is released).
+30Vaux
Auxiliary 30Vdc power supply input (to be used
when the switch 4 of SW3 is set to ON when more
videophones have the same address and must be
switched ON at the same time).
GND
30Vdc power supply ground
+12Vaux Auxiliary 12Vdc power supply input for memory
board version (not implemented yet)
GND
12Vdc power supply ground
BUS
Bus input terminal
BUS
Bus input terminal
TECHNICAL SPECIFICATION
Housing/Mounting:
Kristallo Series 7” videophones - flush
or surface mountig
Push buttons:
Yes, 8
Programming:
Yes, carried out by the dip-switches
located on the rear of the videophone
Controls:
Loudspeaker and call tone volume,
brightness
Power Supply:
Supplied by the BUS line
Power consumption:
Stand-by:
3.3mA Max
Operating: 250mA Max
Working temperature: -10°C +50°C
RESTORING FACTORY PRESET
To restore factory preset, proceed as follows:
• Cut off power supply;
• Make a short between LB and GND terminals;
• Restore power supply and wait until LED blinks twice be-
fore removing the short.
The unit parameters are restored to factory preset.
MEMORY BOARD
This device is also available in the version with
memory board (Art. KRV782/VM).
If you have that version, please refer to the
“Kristallo Series 7" Memory Board” user
manual (in English and Italian) for installation
and use.
The manual is available for download: click/tap or scan the
QR code.
Art. KRV782
Hands free videomonitor
Summary of Contents for ESVK
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