Connection - Alphatech (en)
Main menu:
Connection
Brave NUDV S2 mother board
All functional and add-on parts are marked with a red circled number, the description for which are on next text.
1. Microphone (placed on the lower part of the motherboard) – be careful of the rubber seal of the microphone when changing the name tags, as the improper assembly may affect the acoustics.
2. Connection expansion buttons modules and keyboard
3. Connection point for a PC USB cable (as per NUDV).
4. LED indicator (placed on the lower part of the motherboard)
5. Speaker – at the lower part of the motherboard
6. 12V AC/DC power supply for:
- relay controls
- motherboard heating
- name tag back lighting
- internal power supply (DIP 3 a 4) and
- power supply for exit button circuit.
7. Relays – are galvanically isolated, load is max. 48V, max. 1,5A
on switch 1 is available relay function code ( COSW - CodeSwitch)
8. Exit button - works in current loop circuit, length of connected conductors can be as long as 500m. To work there must be a 12V power supply connected to the terminal (6).
9. Analogue telephone line (the polarity is not important).
10. Earth – connection for an earth against static electricity – protecting the electronics of the door entry system and telephone system.
11. DIP switch:
1 = Service – for use when the password is forgotten. Incoming call then enters straight into programming where you can set new password (don’t forget to switch it off again!) and
2 = Heating – starts integral heating to stop condensation during changeable temperatures
3 = external power supply
4 = external power supply – switching 3 and 4 simultaneously. The powering is used from screw 12V (11) due following reasons:
- using relay mode 7 or 8 – tpermanent switching ON/OFF is possible only with external power supply. Dont forget setup parameter 64.
- Connection of door intercom to certain type of PBX which has problems with current consumption on its extensions during start (Siemens).
5 = Cards lighting (switch ON/OFF Leds backlighting for cards beside button)
12. Connects an optional module RTC to extend auto day / night
