Campbell SDM-SIO1A, Instruction Manual

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Table of Contents
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1. Introduction ................................................................ 1
2. Precautions ................................................................ 2
3. Initial Inspection ......................................................... 3
4. Overview ..................................................................... 3
5. Specifications ............................................................. 4
5.1 Supported Data Rates and Protocols .................................................... 4
5.2 Electrical Parameters ............................................................................ 5
5.2.1 Current Consumption .................................................................... 5
5.2.2 Voltage Specifications .................................................................. 6
5.2.3 Compliance ................................................................................... 6
5.3 Temperature and Humidity Ranges ..................................................... 6
5.4 Dimensions and Weight ....................................................................... 6
5.4.1 SDM-SIO1A ................................................................................. 6
5.4.2 SDM-SIO4A ................................................................................. 7
5.5 Datalogger Compatibility ..................................................................... 7
6. Installation .................................................................. 7
6.1 Mounting .............................................................................................. 8
6.2 Connection and Wiring ........................................................................ 9
6.2.1 Wiring Examples for Connecting the SDM-SIO1A ................... 11
6.2.1.1 RS-485/RS-422 Full-Duplex, One-to-One Connection
Example ........................................................................ 12
6.2.1.2 RS-485 Full-Duplex, Multi-drop Example ....................... 12
6.2.1.3 RS-485 Half-Duplex Wiring Example ............................. 13
6.2.1.4 RS-232 Wiring Example with Handshaking .................... 14
6.2.1.5 RS-232 Basic 3-Wire Example ........................................ 14
6.2.1.6 Connecting a 9-Way Socket to the SDM-SIO1A for
RS-232 Devices ............................................................ 15
6.3 Programming ...................................................................................... 16
6.3.1 CRBasic Instructions .................................................................. 16
6.3.1.1 SerialOpen() ..................................................................... 16
6.3.1.2 SerialClose() ..................................................................... 19
6.3.1.3 SerialIn() .......................................................................... 19
6.3.1.4 SerialOut() ........................................................................ 19
6.3.1.5 SerialInBlock .................................................................... 20
6.3.1.6 SerialOutBlock ................................................................. 20
6.3.1.7 SerialInChk ...................................................................... 20
6.3.1.8 SerialInRecord .................................................................. 20
6.3.1.9 SerialFlush ........................................................................ 20
6.3.2 Example Datalogger Programs ................................................... 20
6.3.2.1 Example using RS-232 Mode ........................................... 21