This card looks like a 512 byte RAM module in which reading and writing can only occur in 16-bit quantities on word boundaries.
The 160 setting property SSDN format is what you would expect:
| 0 | 0 |
| 0 | OID = 16 (hex) |
| crate | slot |
| 0 | 0 |
The data sent (up to 512 byte) is loaded into the module.