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IMPORTANT: Determine whether the devices which will connect to the Model 24SII DES are DTE (Data Terminal Equipment) or DCE (Data Communication Equipment). The following devices are generally DTE: terminals, printers, computers like the IBM PC. The following devices are DCE: modems and some computers.
If your device transmits data on Pin 2 or receives data on Pin 3, it is DTE. If your device receives data on Pin 2 and transmits data on Pin 3, it is DCE. However, to verify the interface requirements, please refer to the Owner's Manual for your device.
The serial ports on the
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| DTE PORT SIGNALS | |
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PIN# | DIRECTION | DESCRIPTION | |
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1 | PGND | Protective ground | |
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2 | TX | Output | Data out |
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3 | RX | Input | Data in |
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4 | RTS | Output | + Voltage when Model 24SII DES powers- |
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| up |
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5 | CTS | Input | Model 24SII DES transmit enabled when |
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| +12V. Internally enabled if no wire |
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| connected. |
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7 | SGND | Signal ground | |
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20 | DTR | Output | - Voltage when Model 24SII DES print |
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| buffer full. |
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