 | PSS 21H-3A1 B3 | DCS Fieldbus Module for Migration of Honeywell Systems (Replaced by PSS 31h-3HON) | 0810 | 20 | 677 KB |
| PSS 21H-3A1 B4 | DCS Fieldbus Module for Migration of Honeywell Systems with HART Capability (Replaced by: PSS 31H-3HON) | 0113 | 24 | 664 KB |
| PSS 21H-3A2 B3 | DCS Fieldbus Module for Migration of Fisher PROVOX Systems (Replaced by PSS 31H-3A2) | 0211 | 20 | 714 KB |
| PSS 21H-3A3 B3 | DCS Fieldbus Module for Migration of Bailey Systems (Replaced by PSS 31H-3A3) | 0613 | 8 | 583 KB |
| PSS 21H-3A4 B3 | DCS Fieldbus Module for Westinghouse Process Control WDPF I and II Systems (Replaced by PSS 31H-3A4) | 0613 | 40 | 1.4 MB |
| PSS 21H-3A5 B3 | DCS Fieldbus Modules for Siemens APACS+ Automation Systems (Replaced by PSS 31H-3A5) | 0613 | 16 | 627 KB |
| PSS 21H-3A6 B3 | DCS Fieldbus Modules for ABB/Taylor MOD300 Direct I/O Automation Systems | 0409 | 12 | 574 KB |
| PSS 21H-3B1 B3 | Application Processors | 1098 | 4 | 406 KB |
| PSS 21H-3B5 B4 | 50 Series Application Processor AP51, Style D | 1299 | 4 | 197 KB |
| PSS 21H-3B6 B4 | 50 Series Application Processor AP51, Style E | 0998 | 4 | 172 KB |
| PSS 21H-3B7 B4 | Application Processor 20 | 0196 | 2 | 539 KB |
| PSS 21H-3B8 B4 | 50 Series Application Processpr AP51, Style B and B1 | 0596 | 4 | 926 KB |
| PSS 21H-3B9 B4 | 50 Series Application Processor Model AP51 | 1293 | 4 | 743 KB |
| PSS 21H-3D1 B3 | AP20 Data Storage Devices | 1099 | 8 | 430 KB |
| PSS 21H-3E1 B3 | 50 Series Data Storage Devices | 1098 | 8 | 336 KB |
| PSS 21H-3E2 B4 | Redundant Array of Independent Disks | 0105 | 4 | 294 KB |
| PSS 21H-3E3 B4 | Advanced Intelligent Tape (AIT) Drive | 1008 | 4 | 1.1 MB |
| PSS 21H-3E4 B4 | Tape Drives for Solaris Processors | 1008 | 8 | 334 KB |
