
| Signal | Return | Signal | Direction | 
 | RS- | Current | TTL | 
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| Pin | Signal | Name | Host / Printer | Function | 232C | Loop | 
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 | Pin | 
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| 1 | 
 | FG | 
 | Safety Ground | O | 
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| 7 | 
 | GND | 
 | Signal Ground | O | 
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| 3 | 
 | RD | ® | Received Data | O | 
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| 20 | 
 | DTR | ¬ | Printer BUSY | O | 
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 | Signal | 
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| 2 | 22 | TD | ¬ | Transmitted | O | O | 
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 | Data | 
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| 11 | 
 | PE | ¬ | Paper End | 
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 | O | 
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 | Signal | 
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| 12 | 
 | FAULT | ¬ | Printer ALARM | O | 
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 | Signal | 
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| 13 | 14 | DTR | ¬ | Printer BUSY | 
 | O | 
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 | Signal | 
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| 18 | 16 | RD | ® | Received Data | 
 | O | 
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| 23 | 
 | RESET | ® | Printer RESET | 
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 | O | 
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 | Signal | 
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Notes: [1] The signals for 
[2]The loop current for Current Loop signal use should be restricted within the rage of 10 to 20 mA.
[3]Please always maintain the “Mark state”, when received data are not being transferred.
[4]The assignment of 
Compatible Connector 
*Printer 
| CITIZEN | 24/48 |