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Communications 9

Host/Printer Port 1 (RS-232-C or RS-422)

This port, labeled “SES1-EIA,” is designed for connection to the host (computer or

modem) or a serial printer via a 25-pin D-shell (DB25P) female connector. This port

uses an RS-232-C communication interface, is configured as a DTE (Data Terminal

Equipment) device, and can operate from 110 to 134,400 baud. The pins supported

are shown below:

RS-232-C Host/Printer Port 1 Pin Assignments

This port also uses (if installed) an optional RS-422 communication interface and can

also operate from 110 to 134,400 baud. The pins supported are shown below:

25 222324 21 181920 17 141516

13 101112 9 678 5 234 1

L(out)+

L(out) - L(in) -

L(in)+

RS-422 Host/Printer Port 1 Pin Assignments

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 81 82

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