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A-1

Appendix A. CS I/O 9 Pin Serial Port

The modem’s CS I/O port is not a standard RS232 connection.

A.1 Pin Description

The COM300 modem connects to the datalogger using an SC12 cable

connected to the devices’ 9-pin subminiature D-type socket connector. This

connector is shown in Figure A-1. Table A-1 shows the I/O pin configuration,

and gives a brief description of the function of each pin.

CS I/O

FIGURE A-1. 9 Pin Connector

NOTE

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 39 40

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