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CyberResearch COMHP 7404 User Manual

4-port, 460.8 kbps data rate, 128-byte fifo buffer, with 4 db-9m cable or 4 db-25m cable
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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
.
. to 5
.
. EST) FAX: 203-643-5001
A
M
P
M

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Summary of Contents for CyberResearch COMHP 7404

  • Page 1 ® 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 ®...
  • Page 3 CyberResearch, Inc. In no event will CyberResearch, Inc. be liable for direct, indirect, special, incidental, or consequential damages arising out of the use of or inability to use the product or documentation, even if advised of the possibility of such damages.
  • Page 4 ® COMHP 7404/-D25 CyberResearch Serial Communications Revision History Revision # Description Date of Issue Initial Release May 1, 2007 2.0C Revision June 9, 2010 ©Copyright 2010 CyberResearch, Inc.

  • Page 5: Table Of Contents

    ® CyberResearch Serial Communications COMHP 7404/-D25 Table of Contents ............................1 NTRODUCTION ..................................1 VERVIEW ’ ................................ 1 NCLUDED ............................1 ACTORY EFAULT ETTINGS ..............................2 ETUP RS-485 E ..............................2 NABLE ODES Interface Mode Examples SW1 – SW4 (continued) ....................4 ............................
  • Page 6 Figure 4 - Switches SW1- SW4, RS-485 ‘RTS’ Enabled, with ‘No Echo’ and no termination resistor in circuit..4 Figure 5 - Switches SW1- SW4, RS-485 ‘RTS’ Enabled, with ‘Echo’ and no termination resistor in circuit....4 Figure 6 - Asynchronous Communications Bit Diagram ....................14 ©Copyright 2010 CyberResearch, Inc.

  • Page 7: Introduction

    COMHP 7404, these four cables terminate in DB-9M connectors. On the COMHP 7404-D25, these four cables terminate in DB-25M connectors. What’s Included The COMHP 7404 is shipped with the following items. If any of these items is missing or damaged, contact CyberResearch, Inc. •...

  • Page 8: Card Setup

    RTS enable or RTS block mode transfer. One of the unique features of the COMHP 7404 is the ability to be RS-485 compatible without the need for special software or drivers. This ability is especially useful in Windows and other protected mode environments where the lower level I/O control is abstracted from the application program.

  • Page 9: Figure 1- Switches Sw1- Sw4, Rs-422

    ® CyberResearch Serial Communications COMHP 7404/-D25 Interface Mode Examples SW1 – SW4 1 2 3 4 AT RT NE T Figure 1- Switches SW1- SW4, RS-422 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.

  • Page 10: Interface Mode Examples Sw1 - Sw4 (Continued)

    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. Only the I/O addresses may be modified by the user. Adding or removing other hardware may change the assignment of I/O addresses and IRQs.

  • Page 11: Electrical Interface Selection

    Electrical Interface Selection 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. Please use the following illustration to aid in the configuration of your electrical interface.

  • Page 12: Clock Modes

    Serial Communications 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).

  • Page 13: Installation

    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. Turn off PC power. Disconnect the power cord.

  • Page 14: Technical Description

    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.

  • Page 15: Connector Pin Assignments

    ® CyberResearch Serial Communications COMHP 7404/-D25 Connector Pin Assignments RS-232, RS-422/485 (DB-37 Male) Port # RS-422/485 RS-232 RTS+ RTS- CTS- CTS+ 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.

  • Page 16: Specifications

    620 mA Rating Mean Time Between Failures (MTBF) Greater than 150,000 hours. (Calculated) Physical Dimensions Board length 6.5 inches (16.51 cm) Board Height including Goldfingers 4.2 inches (10.66 cm) Board Height excluding Goldfingers 3.875 inches (9.841 cm) ©Copyright 2010 CyberResearch, Inc.

  • Page 17: Appendixa - Troubleshooting

    The I/O addresses used by these adapters, as well as the IRQ (if any) should be identified. 2. Configure your CyberResearch adapter so that there is no conflict with currently installed adapters. No two adapters can occupy the same I/O address.

  • Page 18: Appendixb - Electrical Interface

    10 Megabits per second and can have cabling 4000 feet long. RS-422 also defines driver and receiver electrical characteristics that will allow 1 driver and up to 32 receivers on the line at once. RS-422 signal levels range from 0 to +5 volts. RS-422 does not define a physical connector. ©Copyright 2010 CyberResearch, Inc.
  • Page 19 ® 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.

  • Page 20: Appendix C- Asynchronous Communications

    The data rate and communication parameters for asynchronous communications have to be the same at both the transmitting and receiving ends. The communication parameters are baud rate, parity, number of data bits per character, and stop bits (i.e. 9600,N,8,1). ©Copyright 2010 CyberResearch, Inc.

  • Page 21: Appendixd - Silk -Screen

    ® CyberResearch Serial Communications COML 4232U/-D25 Appendix D - Silk-Screen 4.2" 6.5" CyberResearch, Inc. 25 Business Park Drive P: (203) 643-5000; F: (203) 643-5001 Branford, CT USA www.cyberresearch.com...

  • Page 22: Appendixe - Compliance Notices

    Always use cabling provided with this product if possible. If no cable is provided or if an alternate cable is required, use high quality shielded cabling to maintain compliance with FCC/EMC directives. ©Copyright 2010 CyberResearch, Inc.
  • Page 23 Signal connections and programming are the two most common sources of difficulty. CyberResearch support personnel can help you solve these problems, especially if you are prepared for the call.
  • Page 24 ® COMHP 7404/-D25 CyberResearch Serial Communications Intentionally Blank ©Copyright 2010 CyberResearch, Inc.
  • Page 25 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.
  • Page 26 ® COMHP 7404/-D25 CyberResearch Serial Communications Intentionally Blank ©Copyright 2010 CyberResearch, Inc.
  • Page 28 CyberResearch, Inc. 25 Business Park Drive Branford, CT 06405 USA P: (203) 643-5000; F: (203) 643-5001 www.cyberresearch.com...

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Comhp 7404-d25

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