
Chapter 4 RS-232 And RS-422 Serial Interfaces
Data Carrier Detect (DCD). Status signal to the printer. The ON condition is required for the printer to receive data.
Data Terminal Ready (DTR). Control signal from the printer. Subject to configuration.
RS-422
Table 12.
Input Signals |
| Output Signals |
| Miscellaneous |
| |
Signal | Pin | Signal | Pin | Signal | Pin | |
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| |
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| |
- Receive Data | 15 | - Transmit Data | 19 | Chassis Ground | 1 | |
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| |||
+ Receive Data | 17 | + Transmit Data | 25 | Signal Ground | 7 | |
(+RD) |
| (+TD) |
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| |
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+RD,
+TD,
NOTE: ±RD and ±TD form signal and return paths of a differential line signal.
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