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F-29 TROUBLESHOOTING AND REPAIRF-29
INTERFACE DIGITAL MODULE I/O TEST PROCEDURE (continued)
FIGURE F.8 – INTERFACE DIGITAL MODULE I/O (REAR)
DIGITAL I/O | INTERFACE | |
MODULE | ||
MOUNTING SCREW | ||
(USB) | ||
|
INTERFACE
MODULE
DIGITAL I/O
I/O LINE PULL |
|
| |
HIGH | LOW | - | + |
|
| 12VDC | , 1A |
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7. Check to make sure the green LED on the back of the Interface Digital Module I/O is lit. See Figure F.8.
8. If the green LED is lit, the Interface Digital Module I/O is functioning properly.
9. Verify that the switch on the back of the unit is set to the “HIGH” position. See Figure F.8.
10. If the green LED is not lit, make sure the USB cable is connected properly between the Interface Digital Module I/O and the CPU. Try connecting a new USB cable to a different available port on the CPU.
Make sure that there are no shorts NOTE: between the ribbon cables and the user
interface controls.
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