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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
DTE PORT SIGNALS
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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