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2.2.1.4 J3 (Io_XTR108)

Table 6 shows the signals connected to J3 on the Interface Board. J3 is used to connect the current

output of an external XTR108 system to the Interface Board.

Table 6. J3 Pinout (Io_XTR108)

Pin Name Description

1 IO+ High-side current output from the XTR108

2 IO– Low-side current output from the XTR108

2.2.1.5 J4 (Loop Supply)

Table 7 shows the signals connected to J4 on the Interface Board. J4 provides the loop power supply to

the XTR108.

Table 7. J4 Pinout (Loop Supply)

Pin Name Description

1 LOOP– Low-side loop power supply

2 LOOP+ High-side loop power supply

2.2.1.6 J5 (25-Pin Female DSUB)

Table 8 shows the signals connected to J5 on the Interface Board. J5 is used to connect the USB DAQ

control signals to the Interface Board.

Table 8. J5 Pinout (25-Pin Female DSUB)

Pin Name Description Used

1 NC No connection No

2 CTRL1 Control signal 1 Yes

3 CTRL2 Control signal 1 Yes

4 CTRL3 Control signal 1 Yes

5 CTRL4 Control signal 1 Yes

6 CTRL5 Control signal 1 Yes

7 CTRL6 Control signal 1 Yes

8 CTRL7 Control signal 1 Yes

9 CTRL8 Control signal 1 Yes

10 MEAS1 Measure input 1 No

11 MEAS2 Measure input 1 No

12 MEAS3 Measure input 1 No

13 MEAS4 Measure input 1 No

14 MEAS5 Measure input 1 No

15 MEAS6 Measure input 1 No

16 MEAS7 Measure input 1 No

17 MEAS8 Measure input 1 No

18 SPI_SCK SPI clock, channel 2 No

19 SPI_CS2 SPI chip select, channel 2 No

20 SPI_DOUT2 SPI data output, channel 2 No

21 SPI_DIN2 SPI data input, channel 2 No

22 VDUT Switched power supply No

23 VCC USB DAQ power supply No

24, 25 GND Ground No

XTR108EVM-USB Evaluation Board and Software Tutorial SBOU123–March 2012

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