Contents
1. Introduction................................................................. 1
2. Specifications ............................................................. 2
2.1 Supported data rates and protocols ........................................................... 2
2.2 Electrical parameters ................................................................................. 3
2.2.1 SDM-SIO1 current consumption ................................................... 3
2.2.2 SDM-SIO1 voltage specifications.................................................. 4
2.2.3 EMC compliance ........................................................................... 4
2.3 Temperature and humidity ranges ............................................................ 4
2.4 Physical parameters .................................................................................. 5
2.5 Datalogger compatibility .......................................................................... 5
3. Installation .................................................................. 5
3.1 Connections .............................................................................................. 6
3.2 Safety considerations ................................................................................ 8
3.3 Examples for connecting the SDM-SIO1 to other equipment ................... 9
3.3.1 RS-485 one to one connection example ......................................... 9
3.3.2 RS-485 multi unit / in line example ............................................. 10
3.3.3 RS-485 half duplex wiring example ............................................. 11
3.3.4 RS-485 internal circuit diagram ................................................... 11
3.3.5 RS-232 wiring example with handshaking ................................... 12
3.3.6 RS-232 basic 3-wire example ...................................................... 12
3.3.7 Connecting a 9 way socket to the SDM-SIO1.............................. 13
3.4 Power conservation ................................................................................ 13
4. Programming the datalogger ................................... 14
4.1 Special information about the Serial I/O CRBasic commands when
used with the SDM-SIO1 ........................................................................ 14
4.1.1 SerialOpen .................................................................................... 14
4.1.2 SerialClose .................................................................................... 16
4.1.3 SerialIn .......................................................................................... 17
4.1.4 SerialOut ....................................................................................... 17
4.1.5 SerialInBlock ................................................................................ 17
4.1.6 SerialOutBlock .............................................................................. 17
4.1.7 SerialInChk ................................................................................... 18
4.1.8 SerialInRecord .............................................................................. 18
4.1.9 SerialFlush..................................................................................... 18
4.1.10 Serial Input Errors ....................................................................... 18
4.2 Configuring handshaking and receive only modes .................................. 18
4.2.1 Using RTS/CTS and automatic handshaking ................................ 18
4.2.2 RS-485 half-duplex mode ............................................................. 19
4.2.3 Using the RS-232 link in receive only mode ................................. 19
4.3 Example datalogger programs................................................................. 19
5. Firmware upgrades and flash signature errors ...... 22
5.1 Upgrading the firmware .......................................................................... 22
5.2 Firmware signature errors ....................................................................... 22
5.3 Checking the firmware version and signature ......................................... 22
