Owner`s manual

Break/Fix Procedures
18-3
Procedure 18-2 How to Replace a Power Supply Module
1. To replace the second power supply module in a site with redundant power supplies,
2. Open the door of the power supply module and press the cable holder downward.
3. Disconnect the cables from the connectors.
4. Simultaneously press on the tabs on the top and bottom of the plastic front of the old
module, and pull the module from its slot.
5. Slide the new module all the way into the slot until the tabs click into place.
6. Reconnect the cables and press the cable holder back up into place.
7. The main power supply cannot be removed under power and a safeguard is added in order
to prevent unplanned removal. To replace the main power supply module,
8. Open the door of the power supply module.
9. Press down on the top of the main power cable connector to disconnect the user’s main
power cable from the cable inlet on the bottom of the power supply module front panel.
10. Follow the instructions above for replacing a power supply module.
Replacing an I/O Module
Procedure 18-3 How to Replace an I/O Module
To replace an I/O module,
1. If the I/O module includes a TB holder, remove TB holder by pulling on the extractor
handles.
If the I/O module does not include a TB holder, remove the TBs by hand or using the TB
extractor.
2. Simultaneously press on the tabs on the top and bottom of the plastic front of the old
module, and pull the module from its slot.
3. Remove any plug-in 24V power supplies from the old I/O module and plug-in to the new
I/O module. (DI, DO and Mixed I/O modules only.)
4. For DO relay modules, reset the 12VDO dipswitch, if necessary. See the Configuration
chapter.
5. Slide the new module all the way into the slot until the tabs click into place.
6. If the I/O module includes a TB holder, reconnect the TB holder as described in the I/O
Module section.
If the I/O module does not include a TB holder, replace the TBs on the connectors on the
front of the I/O module by hand.
Replacing a Plug-in Port on the CPU Module
Procedure 18-4 How to Replace a Plug-in Port on the CPU Module
To replace a plug-in port on the CPU module,
1. Remove the CPU module from the RTU.