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Standard EIA RS232 asynchronous communication protocol. |
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Passive or active current loop selectable. |
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DB-25 female RS232 connector. |
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Terminal block connector for current loop cable. |
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DCE, DTE, or loopback selectable. |
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4 wire full duplex or 2 wire half duplex selectable. |
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Uses DC 9V power supply or by use of pin 9 of RS-232C. |
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20mA or 60mA selectable. |