Pcb Schematics; Basic Description - Linkcom Link Ana iDP Manual

1. Basic Description

1.1. PCB Schematics

Analog line
Relay 1
Relay 2
12V Power supply
Out button
Button 4
Button 3
DIP switch description
1 = Service, usage – when programming password is forgotten. Incoming call is going directly to
programming mode where you can set new password.
2 = Heating – switch ON integrated heating of mother board to increase resistance against
condensation water during changes of temperature
3 = external power supply
4 = external power supply – switching 3 and 4 simultaneously. The powering is used from screw 12V
due following reasons:
- Using relay mode 7 or 8 – permanent switching ON/OFF is possible only with external power
supply. Don't 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 = Camera lighting up (switch ON/OFF lighting of space before camera via infra LED)
6 = Cards lighting (switch ON/OFF Leds backlighting for cards beside button)
7 = Activate permanent camera operation. In default camera is active only when door intercom is
active.
8 = Allows connect 75ohm to camera output - impedance
p.3 | 23
GND
USB cable
connector
Speaker
Handicapped
norm LED
Mini Dip Switch
Button 2
backlight label LED
Button1