
APPENDIX
C-2. RS-232C Connector
Pin No. | Signal | Function | I/O | Pin No. | Signal | Function | I/O | |
name | direction | name | direction | |||||
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1 | FG | Frame ground |
| *14 | SG2 | Ground for +24V | IN | |
2 | TXD | Send data | OUT | 15 | – |
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3 | RXD | Receive data | IN | 16 | – |
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4 | RTS | Request to send | OUT | 17 | – |
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5 | CTS | Clear to send | IN | *18 | +24V | Drive power for | IN | |
6 | DSR | Data set ready | IN | mechanical section | ||||
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7 | SG |
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| *19 | +24V | Drive power for | IN | |
8 | – |
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9 | – |
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| 20 | DTR | Data terminal ready | OUT | |
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10 | – |
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| 21 | – |
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11 | – |
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| 22 | – |
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12 | – |
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| 23 | – |
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*13 | SG2 | Ground for +24V | IN | 24 | – |
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| 25 | INIT |
| IN |
The signals marked with “*” should not be used to supply power if the AC adapter is used. Doing so may result in damage to the power supply.
13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
25 24 23 22 21 20 19 18 17 16 15 14
<Viewed from Connector Surface>
Note: Connector on printer side:
Connector on cable:
– 100 –