CHAPTER 3 MAINTENANCE PROCEDURES
7000 Series T71 Indicators Service Manual
3-7
Ohaus Corporation www.ohaus.com
3.3 Wiring Connection
Once the T72XW terminal harsh enclosure is open, connections can be made to the
terminal strips on the main board, as shown in Figure .
Figure 3-9: T72XW Main Board Connections, AC Model
3.3.1 Analog Load Cell Connections
Load cell connections are made to the load cell connector located on the main board as shown
in Figure 3-9.
The AC version of the T72XW terminal is designed to power up to ten 350-ohm load cells (or a
minimum resistance of approximately 35 ohms). The battery version of the T72XW terminal is
designed to power up to four 350-ohm load cells (or a minimum resistance of approximately 87
ohms). To confirm that the load cell load for this installation is within limits, the total scale
resistance (TSR) must be calculated. To calculate TSR:
TSR =
Load Cell Input Resistance (Ohms)
Number of Load Cells
DIP
switches
AC
power
connect
or
Load cell
connecto
r
Option 1
connecto
r
Option 2
connecto
r
Содержание 7000 Series
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