| DR300 Operator Manual | Chapter 10 - Serial Interface |
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| 2 : Input/Output Signal Explanation |
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| Pin No. | Signal | Direction | Contents |
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| Name |
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| 1 | F G | - | Frame ground |
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| 2 | S D | Output | Data to be transmitted from printer to host |
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| 3 | R D | Input | Data to be transmitted from host to printer |
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| 7 | S G | - | Signal ground |
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Status 3 Protocol
1 :
Data stream (ESC + “A” ~ ESC + “Z”) from host might not be fully received by printer under the following conditions:
•Printer is in printing process
•Printer is engaged with error condition
2 : Cable connection |
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Host | Printer | |
FG |
| 1 FG |
RD | 2 SD | |
SD | 3 RD | |
SG |
| 7 SG |
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•Some host needs looping of RS and CS at host side to keep signal High 3 : Input/Output signal explanation
Pin No. | Signal | Direction | Contents |
| Name |
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1 | F G | - | Frame ground |
2 | S D | Output | Data to be transmitted from printer to host |
3 | R D | Input | Data to be transmitted from host to printer |
7 | S G | - | Signal ground |
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