® Serial Communications COMHP 7404/-D25 PCI 4-Port Serial Interface Card, 460.8 kbps Data Rate, 128-Byte FIFO Buffer, with 4 DB-9M Cable or 4 DB-25M Cable (-D25 Model) USER’S MANUAL VER. 2.0C• Jun-10 No part of this manual may be reproduced without permission ® CyberResearch , Inc. Hwww.cyberresearch.com 25 Business Park Dr., Branford, CT 06405 USA 203-643-5000 (9 A.M. to 5 P.M.
® CyberResearch Serial Communications COMHP 7404/-D25 ©Copyright 2010 All Rights Reserved. June 9, 2010 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.
® COMHP 7404/-D25 Revision # iv CyberResearch Serial Communications Revision History Description Date of Issue 1.0 Initial Release May 1, 2007 2.0C Revision June 9, 2010 ©Copyright 2010 CyberResearch, Inc.
® CyberResearch Serial Communications COMHP 7404/-D25 Table of Contents INTRODUCTION ............................................................................................................................................1 OVERVIEW ..................................................................................................................................................................... 1 WHAT’S INCLUDED .........................................................................................
® CyberResearch Serial Communications COMHP 7404/-D25 TABLE OF FIGURES Figure 1- Switches SW1- SW4, RS-422.................................................................................................................................. 3 Figure 2 - Switches SW1- SW4, RS-485 ‘Auto’ Enabled, with ‘No Echo’ and the termination resistor in circuit......... 3 Figure 3 - Switches SW1- SW4, RS-485 ‘Auto’ Enabled, with ‘Echo’ and no termination resistor in circuit................
® CyberResearch Serial Communications COMHP 7404/-D25 Introduction Overview The CyberResearch® COMHP 7404 is a four channel RS-232/485/422 PCI Bus serial I/O adapter supporting data rates up to 460.8K bps. The RS-232 compatibility allows for connection to devices utilizing the RS-232 electrical interface, such as modems, data-entry terminals, and plotters. RS-422 provides excellent communications for long distance device connections up to 4000ft.
® CyberResearch Serial Communications COMHP 7404/-D25 Card Setup RS-485 Enable Modes RS-485 is ideal for multi-drop or network environments. RS-485 requires a tri-state driver that will allow the electrical presence of the driver to be removed from the line. The driver is in a tri-state or high impedance condition when this occurs. Only one driver may be active at a time and the other driver(s) must be tri-stated.
® CyberResearch Serial Communications COMHP 7404/-D25 Interface Mode Examples SW1 – SW4 ON OFF 1 2 3 4 AT RT NE T Figure 1- Switches SW1- SW4, RS-422 ON OFF 1 2 3 4 AT RT NE T Figure 2 - Switches SW1- SW4, RS-485 ‘Auto’ Enabled, with ‘No Echo’ and the termination resistor in circuit. ON OFF 1 2 3 4 AT RT NE T Figure 3 - Switches SW1- SW4, RS-485 ‘Auto’ Enabled, with ‘Echo’ and no termination resistor in circuit. CyberResearch, Inc.
® CyberResearch Serial Communications COMHP 7404/-D25 Interface Mode Examples SW1 – SW4 (continued) ON OFF 1 2 3 4 AT RT NE T Figure 4 - Switches SW1- SW4, RS-485 ‘RTS’ Enabled, with ‘No Echo’ and no termination resistor in circuit. ON OFF 1 2 3 4 AT RT NE T Figure 5 - Switches SW1- SW4, RS-485 ‘RTS’ Enabled, with ‘Echo’ and no termination resistor in circuit. Address and IRQ selection The COMHP 7404 is automatically assigned resources by your motherboard BIOS.
® CyberResearch Serial Communications COMHP 7404/-D25 Electrical Interface Selection RS-232 E2 RS-422 E3 RS-232 E4 RS-422 E5 E6 RS-232 E6 E7 RS-422 E7 E8 RS-422 RS-232 Port 4 RS-232 RS-422 RS-232 RS-422 Port 1 Port 1 Port 2 E5 Port 2 E4 E8 RS-422/485 RS-232 E3 Port 3 E2 Port 3 Port 4 E1 RS-422 RS-422 E1 RS-232 Each port on the COMHP 7404 has the ability to be used in either RS-232 or RS-422/485. This is selectable via eight 24 pin DIP-shunts at E1-E8.
® CyberResearch Serial Communications COMHP 7404/-D25 Clock Modes The COMHP 7404 employs a unique clocking option that allows the end user to select from divide by 4, and divide by 1 clocking modes. These modes are selected at Header J1. To select the Baud rates commonly associated with COM: ports (i.e. 2400, 4800, 9600, 19.2, … 115.2K bps) place the jumper in the divide by 4 mode (silk-screen D4). To select the Baud rates above 115.2K select the divide by 1 mode (silk-screen D1).
® CyberResearch Serial Communications COMHP 7404/-D25 Installation Operating System Installation For Windows Users Start by choosing Install Software at the beginning of the CD. Choose Asynchronous COM: Port Software, SeaCOM. Other Operating Systems Refer to the appropriate section of the Serial Utilities Software. System Installation The COMHP 7404 can be installed in any of the PCI expansion slots and contains configuration options for each port that must be set for proper operation. 1. 2. 3. 4. 5.
® CyberResearch Serial Communications COMHP 7404/-D25 Technical Description The CyberResearch® COMHP 7404 provides a PCI interface adapter with 4 RS-232/422/485 asynchronous serial ports for industrial automation and control applications. The COMHP 7404 utilizes the 16C864 UART. This chip features programmable baud rates, data format, interrupt control and industry leading 128-byte transmit and receive FIFOs.
® CyberResearch Serial Communications COMHP 7404/-D25 Connector Pin Assignments RS-232, RS-422/485 (DB-37 Male) RS-422/485 RX+ RXTXTX+ GND RTS+ RTSCTSCTS+ Port # RS-232 DCD RD TD DTR GND DSR RTS CTS RI 1 2 3 4 37 36 35 34 33 18 17 16 15 10 11 12 13 14 29 30 31 32 28 27 26 25 24 9 8 7 6 1 2 3 4 5 20 21 22 23 Technical Note: Board connector is a DB-37M. Mating connector is a DB-37S, ACON P/N: D-37SK-SFS-T or equivalent. CyberResearch, Inc.
® CyberResearch Serial Communications COMHP 7404/-D25 Specifications Environmental Specifications Specification Temperature Range Humidity Range Operating 0º to 50º C (32º to 122º F) 10 to 90% R.H. Non-Condensing Storage -20º to 70º C (-4º to 158º F) 10 to 90% R.H. Non-Condensing Manufacturing • All Systems Printed Circuit boards are built to U. L. 94V0 rating and are 100% electrically tested. These printed circuit boards are solder mask over bare copper or solder mask over tin nickel.
® CyberResearch Serial Communications COMHP 7404/-D25 Appendix A - Troubleshooting SeaCOM Software is supplied with the CyberResearch adapter and will be used in the troubleshooting procedures. By using this software and following these simple steps, most common problems can be eliminated without the need to call Technical Support. 1. Identify all I/O adapters currently installed in your system. This includes your on-board serial ports, controller cards, sound cards etc.
COMHP 7404/-D25 ® CyberResearch Serial Communications Appendix B - Electrical Interface RS-232 Quite possibly the most widely used communication standard is RS-232. This implementation has been defined and revised several times and is often referred to as RS-232-C/D/E or EIA/TIA-232-C/D/E. It is defined as “Interface between Data Terminal Equipment and Data Circuit- Terminating Equipment Employing Serial Binary Data Interchange”. The mechanical implementation of RS-232 is on a 25-pin D sub connector.
® CyberResearch Serial Communications COMHP 7404/-D25 RS-485 RS-485 is backwardly compatible with RS-422; however, it is optimized for party line or multi-drop applications. The output of the RS-422/485 driver is capable of being Active (enabled) or Tri-State (disabled). This capability allows multiple ports to be connected in a multi-drop bus and selectively polled. RS-485 allows cable lengths up to 4000 feet and data rates up to 10 Megabits per second.
® CyberResearch Serial Communications COMHP 7404/-D25 Appendix C- 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, handshaking, and character framing (start/stop bits) are pre-defined and must correspond at both the transmitting and receiving ends.
® CyberResearch Serial Communications COML 4232U/-D25 Appendix D - Silk-Screen 4.2" 6.5" CyberResearch, Inc. 25 Business Park Drive Branford, CT USA 15 P: (203) 643-5000; F: (203) 643-5001 www.cyberresearch.
® CyberResearch Serial Communications COMHP 7404/-D25 Appendix E - 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 to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
® CyberResearch Serial Communications COMHP 7404/-D25 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.
® COMHP 7404/-D25 CyberResearch Serial Communications Intentionally Blank 18 ©Copyright 2010 CyberResearch, Inc.
® CyberResearch Serial Communications COMHP 7404/-D25 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.
® COMHP 7404/-D25 CyberResearch Serial Communications Intentionally Blank 20 ©Copyright 2010 CyberResearch, Inc.
CyberResearch, Inc. 25 Business Park Drive Branford, CT 06405 USA P: (203) 643-5000; F: (203) 643-5001 www.cyberresearch.
