User's Manual

455U-D Radio Modem Module User Manual
Page 4 © Jan 2008
CONTENTS
WARNING ............................................................................................................................... 3
CHAPTER ONE INTRODUCTION..................................................................... 7
1.1 G ENERAL ................................................................................................................. 7
1.1.1 Basic Operation ......................................................................................................... 8
1.1.2 Operating Modes ....................................................................................................... 8
1.1.3 Repeater Functionality............................................................................................... 9
1.1.4 Hot Redundant Standby............................................................................................. 9
1.2 U NACKNOWLEDGED M ODE ...................................................................................... 9
1.3 A CKNOWLEDGED M ODE ........................................................................................ 10
1.4 S ECURITY E NCRYPTION ......................................................................................... 13
1.5 S ERIAL AND R ADIO D ATA ...................................................................................... 13
1.5.1 PLC-Mode ............................................................................................................... 14
1.5.2 Character Type......................................................................................................... 14
1.5.3 Serial Data Rate ....................................................................................................... 15
1.5.4 Radio Data Rate....................................................................................................... 15
1.5.5 Radio Message......................................................................................................... 15
1.6 A DDRESSING .......................................................................................................... 16
1.6.1 Multiple Device Connectivity (MDC)..................................................................... 16
1.7 O PTIMUM P ATH R OUTING ...................................................................................... 17
1.8 D UTY C YCLE L IMITING .......................................................................................... 18
1.9 W HAT O PERATING M ODE TO U SE ? ....................................................................... 18
1.8.1 Unacknowledged or Acknowledged mode? ............................................................ 18
1.8.2 Error Check ?........................................................................................................... 19
CHAPTER TWO INSTALLATION .................................................................. 20
2.1 G ENERAL ............................................................................................................... 20
2.2 A NTENNA I NSTALLATION ....................................................................................... 20
2.2.1 3dB/6dB Collinear antenna. .................................................................................... 22
2.2.2 Yagi antennas. ......................................................................................................... 23
2.3 P OWER S UPPLY ...................................................................................................... 23
2.4 S ERIAL C ONNECTIONS ........................................................................................... 25
2.4.1 RS232 Serial Port ................................................................................................ 25
2.4.2 RS232 Configuration Port ................................................................................... 26
2.4.3 RS485 Serial Port ................................................................................................ 26
2.5 D ISCRETE I/O P OINT .............................................................................................. 27
2.5.1 Using the Discrete I/O as an Output .................................................................... 27
2.5.1 Using the Discrete I/O point as an Input.............................................................. 27
2.6 D UAL R EDUNDANT I NSTALLATION ........................................................................ 28