905U Wireless I/O Module User Manual
105S Serial I/O Module
Page 6 © January 2011
CONTENTS
CHAPTER ONE INTRODUCTION .................................................................................................. 8
1.1 GENERAL ................................................................................................................................... 8
CHAPTER TWO INSTALLATION ................................................................................................ 11
2.1 GENERAL ................................................................................................................................. 11
2.2 ANTENNA INSTALLATION (905U & 105U UNITS ONLY) ............................................................ 11
2.2.1 Dipole and Collinear antennas. ........................................................................................... 13
2.2.2 Yagi antennas. ..................................................................................................................... 13
2.3 POWER SUPPLY ........................................................................................................................ 15
2.3.1 AC Supply ........................................................................................................................... 15
2.3.2 DC Supply ........................................................................................................................... 15
2.3.3 Solar Supply ........................................................................................................................ 16
2.3.4 Multiple Modules ................................................................................................................ 17
2.3.5 24V Regulated Supply ........................................................................................................ 18
2.4 INPUT / OUTPUT ....................................................................................................................... 18
2.4.1 Digital Inputs (905-1, 905-2 and 905-4) ............................................................................. 18
2.4.2 Digital Outputs (905-1) ....................................................................................................... 18
2.4.3 Digital Outputs (905-2, 905-3 and 905-4) .......................................................................... 19
2.4.4 Analog Inputs (905-1 and 905-2) ........................................................................................ 19
2.4.5 Analog Outputs (905-1 and 905-3) ..................................................................................... 21
2.4.6 Pulse Input (905-1) ............................................................................................................ 23
2.4.7 Pulse Inputs (905-2 and 905-4) .......................................................................................... 23
2.4.8 Pulse Output (905-1) ........................................................................................................... 24
2.4.9 Pulse Output (905-3 and 905-4) .......................................................................................... 24
COUNT+ ........................................................................................................................................ 24
2.4.10 RS232 Serial Port ............................................................................................................ 25
2.4.11 RS485 Serial Port ............................................................................................................ 25
2.4.12 Connecting 105S Modules to 905U Modules ................................................................. 26
CHAPTER THREE OPERATION .................................................................................................. 27
3.1 POWER-UP AND NORMAL OPERATION ...................................................................................... 27
3.1.1 Communications ................................................................................................................. 27
3.1.2 Change of state conditions .................................................................................................. 29
3.1.3 Analog Set-points ................................................................................................................ 32
3.1.4 Start-up Poll ........................................................................................................................ 32
3.1.5 Communications Failure (CF) ............................................................................................ 32
3.1.6 Resetting Outputs ................................................................................................................ 33
3.2 SYSTEM DESIGN TIPS ............................................................................................................... 33
3.2.1 System Dynamics ................................................................................................................ 33
3.2.2 Radio Channel Capacity ..................................................................................................... 33
3.2.3 Radio Path Reliability ......................................................................................................... 34
3.2.4 Design for Failures .............................................................................................................. 34
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