LT-976A Rev 3
January 2017
1
Model RB-MD-1086
Replacement Main Controller
Board Installation Instructions
These instructions are for models RB-MD-1086-200, RB-MD-1086-1000, and RB-MD-1086-2000.
Caution: To prevent damage to the boards, always hold them by the edges.
A.
Remove the old board
1.
Turn off the current main controller board.
2.
Shut down the panel and disconnect the power.
3.
Disconnect the power harness from the current main controller board.
4.
Disconnect the ribbon cable from the current main controller board, if it is present.
5.
Disconnect all input, output, and networking harnesses from the current main controller board.
6.
Unscrew the seven #8-32 screws that hold the current board in place.
B.
Attach the new board
1.
Secure the new board with the seven screws you removed in step 6.
2.
If there are any daughter boards attached to the old board, remove them, and then install them on
the new board.
3.
Connect all the input, output, and networking harnesses to the new board.
4.
Connect the ribbon cable to the new board, if it is present.
5.
Connect the power harness to the new board.
C.
Set the RS-485 address
1.
Use DIP switches 1-6 to set the RS-485 network address. See LT-969 for details.
Each TX3 panel must have a unique RS-485 address.
See Figures 3, 4, and 5 for the location of the DIP switches.
Figure 1 RS-485 DIP Switch Settings
2.
Follow the instructions under D to set JW11.
3.
Follow the instructions under E or F depending on the kind of panel that you have.
Address 1
ON
OFF
Address 4
Address 2
Address 3
1
8
1
8
1
8
1
8
