Doorking 1820 Telephone Intercom Manuel d'utilisateur télécharger pdf (Page 16)

1.3.3 Line Interface Boards

Each Line Interface Board has 12 relays on it that are referred to as relays 00 through 11. One line

interface board is required for every 12 phone lines that the system interfaces with. These relays are

identified to the main processor as a four digit relay number beginning with 0000 and increasing

sequentially up to the maximum of 1199. A maximum of 100 line interface boards can be installed

per system. Each cabinet has a label which identifies the cabinet number and the system relay

numbers.

 Line interface boards in the main cabinet are numbered 0 – 2. Line interface board 0 is at the

bottom, line interface board 2 is at the top.

 Each interface board is addressed using the two rotary switches on the board. The two 10

position switches allow for up to 100 board addresses starting at 00 and ending at 99. You

cannot skip an address location. For example, if you have 7 interface boards in the system,

the boards must be addressed from 00 (1

board) to 06 (7

board).

 If a line interface board is replaced, be sure to set the address on the new board correctly.

Disconnect power to the main control board and then reapply for the change to take affect.

DOORKING 1884-010

1.3.4 Power Supply Boards

The main control board can supply power for up to 21 line interface boards located within 200 feet of

the main board. Additional line interface boards are powered by the addition of power supply boards,

each capable of supplying power for up to an additional 21 line interface boards.

 If the distance from the main control board to the line interface boards exceeds 200 feet,

additional power supply boards will be required to supply power to the line interface boards.

PWR

RLY

RELAY

OUTPUT

RELAY

OUTPUT

16.5 VAC

INPUT

1886-010

MAIN

INPUT

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Doorking 1820 Telephone Intercom Manuel d'utilisateur Page 16