To troubleshoot field wiring connection problems, test access points are located on the I/O terminal blocks. The access point for each wire connection is located in the square hole above the corresponding field screw terminal. To contact the field signals, use a test probe at least 25 mm (1 in.) long and 2 mm (0.08 in.) or less in diameter.
To determine the expected voltage levels for your application, refer to the:
- Wiring diagrams for the specific I/O card type in the "Interface Specifications" section
- Connection information supplied with your field device
CAUTION!The test probe is not retained within the access hole. It can fall out and short across field wiring if it is not held in place.