Power Supply - Screw (6); Exit Button - Screw (8); Bus For Buttons Extending - Alphatech A-VarioBell User And Service Manual

1.5.1 Power supply - screw (6)

Power supply 12V might be DC or AC, not depends on polarity, from 12V
is max. consumption 250mA.
Power supply is possible use for electrical lock powering . then is
recommended power supply 12V/1A
It is possible use power supply 24V DC. It is mainly suitable during
installation where power supply already exists and it is used for example
for access system control. Board heating has regulating element for power
restriction. The other circuits comply to voltage 24V. You must not use AC
power supply! Just DC. During connection not depends on polarity.
Power supply on screw (6) is neccessary for following features:
- relay control (powering of relay induction)
- board heating (DIP 2 is activated, current regulation according
voltage and temperature)
- name cards lighting ( DIP 5 is activated)
- external powering of door phone (DIP 3 and 4). during
permanent power supply is possible use relays mode 7 and 8.
(caution for rameter 64).
- powering of exit button circuit
- powering of LED signalling on front panel
1.5.2 Exit button – screw (8)
Exit button is designed for direct relays control. At each relay you can
setup switching for 1 or 2 pulses. The button (screw (8)) is connected in
circuit of current loop powering from 12V (screw (6)). By this way you can
connect exit button for cable up to 500m.

1.5.3 BUS for buttons extending

This
connection of extending buttons up
to 87 buttons including keypad.
The BUS includes except seriál
data also power for name cards
lighting.
Button module is supply in
2 versions:
VBD10-mod – designed
for 10 buttons – 5 in left and 5 in
right
VBD5-mod – designed for
5 buttons – 5 in right only
The Keypad VBDKey is
possible install at BUS whenever you want and i tis identify automatically.
A-VarioBell – User and service manual
14
BUS allows