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ROC827 Instruction Manual
Issued Mar-06 Installation and Use 2-19
2.7.2 Removing a License Key
To remove a license key:
Caution
Failure to exercise proper electrostatic discharge precautions (such as
wearing a grounded wrist strap) may reset the processor or damage
electronic components, resulting in interrupted operations.
When working on units located in a hazardous area (where explosive
gases may be present), make sure the area is in a non-hazardous state
before performing procedures. Performing these procedures in a
hazardous area could result in personal injury or property damage.
1. Perform the backup procedure described in “Preserving Configuration
and Log Data” in Chapter 6, Troubleshooting.
2. Remove power from the ROC827.
3. Remove the wire channel cover.
4. Unscrew the screws from the CPU faceplate.
5. Remove the CPU faceplate.
6. Remove the license key from the appropriate terminal slot (P4 or P6)
in the CPU (refer to Figure 2-7).
7. Replace the CPU faceplate.
8. Replace the screws from the CPU faceplate.
9. Replace the wire channel cover.
10. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.
11. Restore power to the ROC827.
2.8 Startup and Operation
Before starting the ROC827, perform the following checks to ensure the
unit components are properly installed.
Make sure the power input module is properly seated in the backplane.
Make sure I/O and communication modules are seated in the
backplane.
Check the field wiring for proper installation.
Make sure the input power has the correct polarity.
Make sure the input power is fused at the power source.