Use the following table to determine the part number for the field replaceable unit (FRU):
| CCIN or FFC | Type and model | Part number | Description | Location code |
| 684 | 9117-MMA | 93H6563 | Enhanced remote asynchronous node, 16-Port RS-422 | |
| 684 | 9117-MMA | 93H7091 | power supply, remote async node |