Alphatech A-VarioBell User And Service Manual page 13

1. Microphone (placed in plastic cover, output at board bottom
2. PC connection connector – USB cable
3. BUS connector for connection extending modules and keypad
4. ACU battery RTC (real time clock chip)
5. Speaker – output at board bottom. At top of board is connector for
connection of external speaker
6. 12V AC/DC power supply for:
- relays control
- board heating
- name cards lighting
- external powering of door phone (DIP 3 and 4)
-exit button circuit
- LED signalling on front panel
7. relays – are galvanically isolated switchable contacts, max. 48V, max.
1,5A
At relay 1 is available function of code relay (COSW – CodeSwitch) (via.
page.29)
8. Exit button – works in circuit of current loop. The length of connected
wires to button might be up 500m. Functionality condition is presents of
12V power on screw (6)
9. Analog phone line (not depends on polarity)
10. Grounding – connection for grounding against static electricity – protect
door phone electronic as same as PBX
11. DIP switch:
1 = Servis – used when password is forgotten.
Incoming
programming mode where you can setup
new password. (do not forget return back
to off)
2 = heating – activate integrated board heating
3 = external power supply
4 = External power supply – switching allways 3 and 4 simultaneously. Powering
is used from screw 12V (6) and there are 2 reasons for usage:
- using relay in mode 7 or 8 - permanent relay close/open is possible with
external powering only. Do not forget setup rameter 64
- connection of door phone to PBX extension which has troubles with
current consumption after PBX start (Siemens).
5 = name cards lighting (switch ON/OFF LED lighting for name cards)
call is going directly to
A-VarioBell – User and service manual
13