Datasheet

EXC-

SNS-

SNS+

SIG+

SIG-

EXC+

OUT+

EXC-

SENSE-

OUT-

SENSE+

EXC+

OUT+

EXC-

OUT-

EXC+

OUT-

EXC+

OUT+

EXC-

SENSE+

SENSE-

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Getting Started

1.4.2 Connecting a 6-Wire Load Cell to the Terminal Block

Figure 3 shows the connection of a 6-wire load cell to the terminal block. In this configuration, the load cell

is excited by the +5V power supply, and the ADC’s reference is taken from the sense wire returning from

the load cell. The sense wire connects to the excitation wire at the bridge sensor.

Figure 3. 6-Wire Load Cell to Terminal Block

1.4.3 Connecting a 4-Wire Load Cell to the Header

Figure 4 shows the connection of a 4-wire load cell to the header. In this configuration, the load cell is

excited by the +5V power supply, and the ADC reference is taken from the power supply.

Figure 4. 4-Wire Load Cell to Header

For this configuration, the reference select switch must be in the +5VA position; the EXT position does not

work.

1.4.4 Connecting a 6-Wire Load Cell to the Header

Figure 5 shows the connection of a 6-wire load cell to the header. In this configuration, the load cell is

excited by the +5V power supply, and the ADC reference is taken from the sense wire returning from the

load cell. The sense wire connects to the excitation wire at the bridge sensor.

Figure 5. 6-Wire Load Cell to Header

For this configuration, the reference select switch should be in the EXT position for best performance. The

+5V position also works, but the device may not perform as well.

SBAU175A–July 2010–Revised August 2011 ADS1131REF and ADS1231REF

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