Remove and Replace USB Relay Panel

Note: You must turn the key switch from "Standby" to "On" for the master cabinet and all expansion cabinets before following this procedure.

1. Before starting this service action enable the reserve cabinet(s) function.

   a) Reserve the cabinet(s) for maintenance.

   b) Enter a description of the service action (i.e. replacing USB relay panel).

   c) Select the estimated amount of time of the service action from the pull-down.

   d) Select the Reserve button.

   e) Other users will be alerted that this service action is in progress when they log in.

2. Observe all ESD precautions.

3. From the rear of the cabinet loosen the three captive fasteners on the right side of the Service Processor and I/O panel and open the panel.

4. Remove the Rear Sequencer J14 and the Front Sequencer J14 connections from the rear of the service processor and I/O panel.

   a) View the rear of the service processor and I/O panel illustration.

5. Disconnect the USB cable from the left side of the USB Relay panel.

6. Unscrew the four screws holding the USB Relay Panel in place.

   Note: The four screws that hold the panel in place are not captive fasteners.

7. Remove the USB Relay Panel. Use care when moving any cables.

8. Attach the new USB Relay Panel using the four screws.

9. Reconnect the Rear Sequencer J14 and the Front Sequencer J14 connections.

10. Reconnect the USB relay cable.

11. Close the service processor and I/O panel and tighten the three captive fasteners.

12. Turn the key switch from "On" back to "Standby".

13. After this sevice action has been completed all Alarms will need to be deleted: Delete Alarms.

    a) From the left side of the screen select the "check mark" box to select all alarms.

    b) Select the Delete button to delete all of the alarms.

    Note: Be sure to delete any associated alarms from all other monitoring applications.

14. Disable the reserve cabinet(s) function.

    a) Release the cabinet(s).

    b) Select the Release button.