DoorKing 1820 - Manual (Page 22)

2.2.1 Wiring Detail – Auxiliary Cabinets
16 VAC
PWR
INPUT
1820 Telephone Intercom System
Wiring Detail - Auxiliary Cabinets
1
2
2
3
3
To additional Line Interface Boards
From Preceding Line Interface Boards
4
4
Power Supply Board can power up to 21 additional Line Interface Boards. The power supply board is
only need if over 21 Line Interface Boards are used, or if they are located over 200 feet from the main
control babinet.
DOORKING, INC., INGLEWOOD, CA 90301
Title:
Date: Rev. Dwg. No. A
1820 Telephone Intercom System
Wiring Detail Auxiliary Cabinets
4/05 M1820-065-7
16 Volt, 50 VA UL Listed Transformer.
1
Page 22 1820-065-B-2-06