Omega RS-422/485 - Manuals

Omega RS-422/485 – Manual in PDF format online.

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Manual

Manual Omega RS-422/485

Summary

Page 2 - One Omega Drive, River Bend Technology Centre; OMEGAnet

Servicing North America: USA: One Omega Drive, P.O. Box 4047 ISO 9001 Certified Stamford CT 06907-0047TEL: (203) 359-1660 FAX: (203) 359-7700 e-mail: [email protected] Canada: 976 BergarLaval (Quebec) H7L 5A1, CanadaTEL: (514) 856-6928 FAX: (514) 856-6886 e-mail: [email protected] For immediate technical o...

Page 3 - Contents

Contents I NTRODUCTION ..........................................................................1 O VERVIEW ................................................................................................ 1 W HAT ’ S I NCLUDED ...........................................................................

Page 4 - Figures

A PPENDIX A - T ROUBLESHOOTING .........................................19 A PPENDIX B - H OW T O G ET A SSISTANCE E RROR ! B OOKMARK NOT DEFINED . A PPENDIX C - E LECTRICAL I NTERFACE ...................................22 RS-422..........................................................................

Page 5 - Introduction; Overview

Introduction OMG-ULTRA-COMM422 Page 1 Introduction Overview The OMG-ULTRA-COMM422 provides the PC with four additional RS-422/485 serial ports for terminals, modems, printers, etc. The unique feature of the OMG-ULTRA-COMM422 is the ability to be RS-485 compatible without the need for special softwar...

Page 6 - Card Setup; Address Selection

Card Setup OMG-ULTRA-COMM422 Page 2 Card Setup The OMG-ULTRA-COMM422 contains several jumper straps, which must be set for proper operation. Address Selection Each port on the OMG-ULTRA-COMM422 occupies eight consecutive I/O locations. A DIP-switch is used to set the base address for these locations...

Page 8 - Jumper Selections; Note

Card Setup OMG-ULTRA-COMM422 Page 4 Jumper Selections For ease of configuration, the headers are grouped by port. Port one headers have a ‘J1’ prefix; Port two headers have the ‘J2’ prefix, etc. For example, the header that controls the Port one IRQ selection is J1B; the header that controls the Por...

Page 9 - Interrupt Modes; N S M

Card Setup OMG-ULTRA-COMM422 Page 5 Interrupt Modes Headers J1A through J4A select the interrupt modes for each port. Each port must be set in the correct mode to insure proper operation. ‘ N ’ indicates the ( N )ormal, single interrupt per port mode. ‘ S ’ Indicates the ( S )hared interru pt mode, ...

Page 11 - Interface Mode Examples J1D – J4D

Card Setup OMG-ULTRA-COMM422 Page 7 Interface Mode Examples J1D – J4D AT RT NE Figure 6- Headers J1D- J4D, RS-422 AT RT NE Figure 7 - Headers J1D- J4D, RS-485 ‘Auto’ Enabled, with ‘No Echo’ AT RT NE Figure 8 - Headers J1D- J4D, RS-485 ‘Auto’ Enabled, with ‘Echo’

Page 12 - Interface Mode Examples J1D – J4D (continued); AT

Card Setup OMG-ULTRA-COMM422 Page 8 Interface Mode Examples J1D – J4D (continued) AT RT NE Figure 9 - Headers J1D- J4D, RS-485 ‘RTS’ Enabled, with ‘No Echo’ AT RT NE Figure 10 - Headers J1D- J4D, RS-485 ‘RTS ’ Enabled, with ‘Echo’

Page 13 - Line Termination; Name

Card Setup OMG-ULTRA-COMM422 Page 9 Line Termination Typically, each end of the RS-485 bus must have line terminating resistors (RS-422 terminates at the receive end only). A 120-ohm resistor is across each RS-530/422/485 input in addition to a 1K ohm pull-up/pull-down combination that bias the rece...

Page 14 - Clock Modes

Card Setup OMG-ULTRA-COMM422 Page 10 Clock Modes The OMG-ULTRA-COMM422 employs a unique clocking option that allows the end user to select from divide by 4, divide by 2 and divide by 1 clocking modes. These modes are selected at Headers J1C through J4C. To select the Baud rates commonly associated w...

Page 15 - Baud Rates and Divisors for the ‘Div1’ mode; For this Data Rate

Card Setup OMG-ULTRA-COMM422 Page 11 Baud Rates and Divisors for the ‘Div1’ mode The following table shows some common data rates and the rates you should choose to match them if using the adapter in the ‘Div1’ mode. For this Data Rate Choose this Data Rate 1200 bps 300 bps 2400 bps 600 bps 4800 bps...

Page 16 - Baud Rates and Divisors for the ‘Div2’ mode

Card Setup OMG-ULTRA-COMM422 Page 12 Baud Rates and Divisors for the ‘Div2’ mode The following table shows some common data rates and the rates you should choose to match them if using the adapter in the ‘Div2’ mode. For this Data Rate Choose this Data Rate 1200 bps 600 bps 2400 bps 1200 bps 4800 bp...

Page 17 - Installation; Operating System Installation; Install Software at the beginning of the CD. Choose; Other Operating Systems

Installation OMG-ULTRA-COMM422 Page 13 Installation The OMG-ULTRA-COMM422 can be installed in any of the PC expansion slots. The OMG-ULTRA-COMM422 contains several jumper straps for each port that must be set for proper operation. 1. Turn off PC power. Disconnect the power cord. 2. Remove the PC cas...

Page 18 - Technical Description; Features; Modem Control Signal Conside rations

Technical Description OMG-ULTRA-COMM422 Page 14 Technical Description The OMG-ULTRA-COMM422 utilizes the 16550 UART. This chip features programmable baud rates, data format, interrupt control and a 16-byte input and output FIFO. Also available as options are the Startech 16C650 and the Texas Instrum...

Page 19 - Interrupts

Technical Description OMG-ULTRA-COMM422 Page 15 Interrupts A good description of an interrupt and it’s importance to the IBM PC can be found in the book ‘Peter Norton’s In side the PC, Premier Edition’: “ One of the key things that makes a computer different from any other kind of man-made machine i...

Page 21 - Signal; DB-37 Connector Pin Assignments

Technical Description OMG-ULTRA-COMM422 Page 17 Connector Pin Assignments DB-9 Pin Assignments Signal Name Pin # Mode GND Ground 5 TX + Transmit Data Positive 4 Output TX- Transmit Data Negative 3 Output RTS+ Request To Send Positive 6 Output RTS- Request To Send Negative 7 Output RX+ Receive Data P...

Page 22 - Specifications; Environmental Specifications

Specifications OMG-ULTRA-COMM422 Page 18 Specifications Environmental Specifications Specification Operating Storage Temperature Range 0º to 50º C (32º to 122º F) -20º to 70º C (-4º to 158º F) Humidity Range 10 to 90% R.H. Non-Condensing 10 to 90% R.H. Non-Condensing Manufacturing • IPC 610-A Class-...

Page 23 - Appendix A - Troubleshooting

Appendix A - Troubleshooting OMG-ULTRA-COMM422 Page 19 Appendix A - Troubleshooting A Serial Utility Diskette is supplied with the adapter and will be used in the troubleshooting procedures. By using this diskette and following these simple steps, most common problems can be eliminated without the n...

Page 25 - Appendix B - How To Get Assistance

OMG-ULTRA-COMM422 Page 21 Appendix B - How To Get Assistance Please refer to Troubleshooting Guide prior to calling Technical Support. 1. Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance is still needed please see below. 2. When calling for technical assistance, pleas...

Page 26 - Appendix C - Electrical Interface; Active

Appendix C - Electrical Interface OMG-ULTRA-COMM422 Page 22 Appendix C - Electrical Interface RS-422 The RS-422 specification defin es the electrical characteristics of balanced voltage digital interface circuits. RS-422 is a differential interface that defines voltage levels and driver/receiver ele...

Page 27 - Appendix D - Asynchronous Communications

Appendix D - Asynchronous Communications OMG-ULTRA-COMM422 Page 23 Appendix D - Asynchronous Communications Serial data communications implies that individual bits of a character are transmitted consecutively to a receiver that assembles the bits back into a character. Data rate, error checking, han...

Page 29 - Appendix F - Compliance Notices; Federal Communications Commission Statement; Warning

Appendix F - Compliance Notices OMG-ULTRA-COMM422 Page 25 Appendix F - Compliance Notices Federal Communications Commission Statement FCC - This equipment has been tested and found to comply with the limits for Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed t...

Page 30 - RETURN REQUESTS/INQUIRIES; WARRANTY

WARRANTY/ DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for aperiod of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping...