TUNNEL MASTER JR MANUAL
System Hardware
27
The Entrance Keypad Jumper Settings
Jumper Settings
The following picture and table will explain the location and
purpose of the various jumpers on the Entrance Keypad circuit
board.
The following picture shows the Entrance Keypad circuit board
and location of the various jumpers
Keypad Circuit
Board
Jumper Setting/
Function
These are the jumper functions and their normal settings. By default,
the keypad comes address as 5. There is no reason to change this
unless advised by ICS. If you have two keypads, you should address
the second as address 6.
Jumper Setting
Function
J1
ON
Reserved Jumper; ALWAYS ON
J2
ON
Reserved Jumper; ALWAYS ON
J3
DOWN E-Prom Chip Enable; Jumper Down next to “CE”
J4 ON
Ground
Jumper
J5
OFF
Biasing Resister High (+)
J6
OFF
Biasing Resister Low (-)
J7
ON
Terminating Resister. Set to ON if it is the first or
last device in the network.
JP1
Dip switch
JP7
JP5
JP6
JP3
JP4
(SW1) Circuit
Board Reset
button
JP2
