Campbell Scientific SDM-SIO1 Serial Input/Output Module - Manual (Page 6)

Table of Contents
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4.3 Example Datalogger Programs.......................................................... 20
4.3.1 Example Using RS-232 Mode.................................................... 20
4.3.2 Example Using RS-485 Mode.................................................... 21
5. Firmware Upgrades and Flash Signature Errors ...22
5.1 Upgrading the Firmware.................................................................... 22
5.2 Firmware Signature Errors ................................................................ 22
Appendix
A. Using the Handshaking Lines for General
Input/Output ..........................................................A-1
A.1 The Input Pin (Pin 8) ....................................................................... A-1
A.2 The Output Pin (Pin 9) .................................................................... A-2
Tables
3-1. SDM Address Settings ........................................................................ 6
3-2. SDM-SIO1 Connections (left to right as viewed from the front of
the unit)............................................................................................ 7
3-3. SDM-SIO1 Functional Description of the Connections ...................... 7
4-1. Communications Port Parameters RS-232 ........................................ 15
4-2. Communications Port Parameters RS-485 Full Duplex .................... 15
4-3. Communications Port Parameters RS-485 Half Duplex.................... 16
4-4. Communications Port Parameters RS-232 Receive Only Mode ....... 16