| 66321B-007 | 2 Extra 5-pin output connectors |
| 66321B-0L1 | English Printed Users Guide (full documentation on CD-ROM) |
| 66321B-100 | DC power supply 87-106VAC operation, 50/60Hz |
| 66321B-120 | DC power supply 104-127VAC operation, 50/60Hz |
| 66321B-1CM | Rackmount Kit with blank filler panel |
| 66321B-220 | DC power supply 191-233VAC operation, 50/60Hz |
| 66321B-230 | DC power supply 209-254VAC operation, 50/60Hz |
| 66321B-8ZJ | Removes feet for use in a racked system |
| 66321B-A6J | ANSI Z540-1-1994 Calibration |
| 66321B-AXS | Rackmount Kit for side by side mounting |
| 66321B-UK6 | Commercial calibration certificate with test data |
| 14565B | |
| 1CM021A | |