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see > SCSI 50-Pin External Shielded Header Connector
see > for SCSI Interface - Electrical Specifications
(Unshielded Alternative 1 connector specified in ANSI X3.131-1986)
| Pin | Signal Name | Pin | Signal Name |
|---|---|---|---|
| 1 | Ground | 2 | -Data Bit(0) |
| 3 | Ground | 4 | -Data Bit(1) |
| 5 | Ground | 6 | -Data Bit(2) |
| 7 | Ground | 8 | -Data Bit(3) |
| 9 | Ground | 10 | -Data Bit(4) |
| 11 | Ground | 12 | -Data Bit(5) |
| 13 | Ground | 14 | -Data Bit(6) |
| 15 | Ground | 16 | -Data Bit(7) |
| 17 | Ground | 18 | -Data Bit(Parity) |
| 19 | Ground | 20 | Ground |
| 21 | Ground | 22 | Ground |
| 23 | Reserved | 24 | Reserved |
| 25 | Ground (open) | 26 | TERMPWR |
| 27 | Reserved | 28 | Reserved |
| 29 | Ground | 30 | Ground |
| 31 | Ground | 32 | -ATN |
| 33 | Ground | 34 | Ground |
| 35 | Ground | 36 | -BSY |
| 37 | Ground | 38 | -ACK |
| 39 | Ground | 40 | -RST |
| 41 | Ground | 42 | -MSG |
| 43 | Ground | 44 | -SEL |
| 45 | Ground | 46 | -C/D |
| 47 | Ground | 48 | -REQ |
| 49 | Ground | 50 | -Input/Output |
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