Mettler Toledo IND231 Manuel D'installation page 22

2.4.2. PCB Identification
The IND231/IND236 terminal circuit boards all mount on the PCB support assembly. The AC
connection board is only needed for the IND236. The charging board is only used for terminals
powered by a rechargeable battery pack. The option boards all mount in the same location. Figure
2-15 shows the location of each type of board.
2.4.3. Main Board Wiring Connections
The Figure 2-16 shows the assignment of connectors on the main board. Be sure to attach cables
to the correct socket.
The metrology switch is a momentary contact switch. When it is pressed, the terminal enters setup
at the F1 Scale settings menu, where scale parameters can be configured. This is the only method
2-8 METTLER TOLEDO IND231/IND236 Installation Manual
Position
2 None (option port)
3 COM1 (RS-232)
4 Load Cell Cable
AC connection board
location
(IND236 only)
Option board
location
AA Cell Enclosure
Charging board socket
Option board
Keypad
Display
Assignment
Isolated RS-232/422/485
Figure 2-15: Circuit Board Locations
DC power
Figure 2-16: Main Board Connections
USB Discrete I/O
-
-
AC/DC power board
(beneath cover
Main board
Charging board
location (For
rechargeable battery
only)
COM1 RS-232
Metrology
switch
Load Cell
Backlight
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