Dual Serial/Parallel Port Adapter
(250-4025)                 Pinouts                    Faxback Doc. # 5577

Parallel Port

┌───┬───────────────┬───┬────────────────┐
│Pin│Assignments    │Pin│Assignments     │
├───┼───────────────┼───┼────────────────┤
│1  │ Strobe *      │14 │                │
│2  │ Data Bit 0    │15 │ ERROR *        │
│3  │ Data Bit 1    │16 │ INITIALIZE *   │
│4  │ Data Bit 2    │17 │ SELECT IN *    │
│5  │ Data Bit 3    │18 │ Ground         │
│6  │ Data Bit 4    │19 │ Ground         │
│7  │ Data Bit 5    │20 │ Ground         │
│8  │ Data Bit 6    │21 │ Ground         │
│9  │ Data Bit 7    │22 │ Ground         │
│10 │ ACKNOWLEDGE * │23 │ Ground         │
│11 │ BUSY          │24 │ Ground         │
│12 │ PAPER END     │25 │ Ground         │
│13 │ SELECT        │   │                │
│───┼───────────────┼───┴────────────────┘
│15 │ ERROR *       │
│16 │ INITIALIZE *  │
│17 │ SELECT IN *   │
│18 │ Ground        │
└───┴───────────────┘
18-25 - Ground

* Denotes low true logic.

Serial Port
┌──┬──────────────────────┐
│1 │Carrier Detect        │
│2 │Receive Data          │
│3 │Transmit Data         │
│4 │Data Terminal Ready   │
│5 │Signal Ground         │
│6 │Data Set Ready        │
│7 │Request to Send       │
│8 │Clear To Send         │
│9 │Ring Indicator        │
└──┴──────────────────────┘


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