| Spec | Description |
|---|---|
| S1 | Loop 1 station (manual/auto) |
| S2 | Loop 2 station (manual/auto) |
| S3 | General purpose alarm 1 |
| S4 | General purpose alarm 2 |
| S5 | General purpose alarm 3 |
| S6 | General purpose alarm 4 |
| S7 | Auxiliary input 1 |
| S8 | Auxiliary input 2 |
| S9 | External alarm 1 |
| S10 | External alarm 2 |
| S11 | ASCII string descriptor 1 |
| S12 | Digital override permissive output 1 |
| S13 | Digital override permissive output 2 |
| S14 | Digital override permissive output 3 |
| S15 | Digital override permissive output 4 |
| S16 | Output default mode |
| S17 | Spare real |
| S18 | Spare |
| S19 | Spare |
| Block | Type | Description |
|---|---|---|
| 900 | Bit | Alarm status |
| 901 | Bit | Alarm acknowledge key indicator |
| 902 | Bit | Loop 1 faceplate switch |
| 903 | Bit | Loop 2 faceplate switch |
| 904 | Bit | Auxiliary switch 1 |
| 905 | Bit | Auxiliary switch 2 |
| 906 | Bit | Auxiliary switch 3 |
| 907 | Bit | Auxiliary switch 4 |
| 908 | Bit | Digital output 1 (auto/manual) |
| 909 | Bit | Digital output 2 (auto/manual) |
| 910 | Bit | Digital output 3 (auto/manual) |
| 911 | Bit | Digital output 4 (auto/manual) |
| 912 | Bit | Bypass status (manual) |
| 913 | Bit | Inter-board link status |
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