® Data Acquisition CYCOM 485 ISA 2-Port RS-485 Serial Interface Card, 2 DB-9F USER’S MANUAL VER. 3.0C• Aug-11 No part of this manual may be reproduced without permission ® CyberResearch , Inc. www.cyberresearch.com 25 Business Park Dr., Branford, CT 06405 USA 203-643-5000 (9 A.M. to 5 P.M.
CYCOM 485 User’s Guide ©Copyright 2011 All Rights Reserved. August 13, 2011 The information in this document is subject to change without prior notice in order to improve reliability, design, and function and does not represent a commitment on the part of CyberResearch, Inc. In no event will CyberResearch, Inc.
CYCOM 485 User’s Guide Revision # 3.
Table of Contents About this User's Guide .......................................................................................................................6 What you will learn from this user's guide .........................................................................................................6 Conventions in this user's guide .........................................................................................................................6 Where to find more information ............
Preface About this User's Guide What you will learn from this user's guide This user's guide describes the CyberResearch™ CYCOM 485 data acquisition devices and lists device specifications. Conventions in this user's guide For more information about … Text presented in a box signifies additional information and helpful hints related to the subject matter you are reading.
Chapter 1 Introducing the CYCOM 485 The CYCOM 485 is a serial interface for the IBM PC and compatibles. The UART (serial communications chip) is a 16550. The physical interface conforms to the RS485 standard. The 16550 UART is the standard UART of the personal computer. Any software which is designed to control IBM PC serial COM ports will work with the CYCOM 485. A base address switch and interrupt jumper allow you to select one of four COM ports; COM1, COM2, COM3, or COM4.
Chapter 2 Installing a CYCOM 485 Before you open your computer and install the board, install and run InstaCal™, the installation, calibration and test utility included with your board. InstaCal will guide you through switch and jumper settings for your board. Detailed information regarding these settings can be found below. The CYCOM 485 is easy to install. You must set the COM port number then open your computer and install the board.
CYCOM 485 User's Guide Interrupts Set the interrupt with the interrupt level jumper (Figure 2) according to the following: COM1 = IRQ 4 COM2 = IRQ 3 COM3 = IRQ 4 (or a unique IRQ if your PC's ) COM4 = IRQ 3 (BIOS requires one ) Figure 2. Jumper - Interrupt Levels for COM1/COM2 COM3 and COM4 In order to use COM3 or COM4 you will have to read your computer owner's manual and determine the method of setting the interrupts for COM3 and COM4.
CYCOM 485 User's Guide However your computer works, you must have only one COM device per COM address/interrupt. If you have two, neither will work. Cabling Cabling to the CYCOM 485 is through a 9-pin, D-type female connector. The CBL 09xxMM is compatible with these connectors. Figure 3 is a sample RS485 cable with power to a remote module. Multiple modules may be added to the RS485 link. Figure 3. RS485 Cable CYCOM 485 to Remote Module The pin assignments of this connector are shown in Figure 4.
CYCOM 485 User's Guide Figure 5.
Chapter 3 Operation Introduction and Programming Example After installation, the CYCOM 485 operates just like any other COM port. Using the serial drivers supplied with DOS, Windows, Languages or applications programs, the CYCOM 485 handles communications with other RS422 or RS485 devices. Here is a simple example in QuickBasic 4.5 showing how to use the CYCOM 485 board. 'Program to communicate with a remote temperature module. 'First configure CyCOM 485 then configure and communicate with the module.
Figure 6.
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CYCOM 485 User’s Guide Product Service Diagnosis and Debug CyberResearch, Inc. maintains technical support lines staffed by experienced Applications Engineers and Technicians. There is no charge to call and we will return your call promptly if it is received while our lines are busy. Most problems encountered with data acquisition products can be solved over the phone. Signal connections and programming are the two most common sources of difficulty.
CYCOM 485 User’s Guide Warranty Notice CyberResearch, Inc. warrants that this equipment as furnished will be free from defects in material and workmanship for a period of one year from the confirmed date of purchase by the original buyer and that upon written notice of any such defect, CyberResearch, Inc. will, at its option, repair or replace the defective item under the terms of this warranty, subject to the provisions and specific exclusions listed herein.
CyberResearch, Inc. 25 Business Park Drive Branford, CT 06405 USA P: (203) 643-5000; F: (203) 643-5001 www.cyberresearch.
