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Related Manuals for Acces I/O products LPCI-COM422-8
Summary of Contents for Acces I/O products LPCI-COM422-8
- Page 1 ACCES I/O LPCI-COM422-8 Get Quote 10623 Roselle Street, San Diego, CA 92121 • (858) 550-9559 • FAX (858) 550-7322 contactus@accesio.com • www.accesio.com MODEL LPCI-COM485/8 USER MANUAL FILE: MLPCI-COM485-8.E1l www.assured-systems.com | sales@assured-systems.com Page 1/25...
- Page 2 ACCES, nor the rights of others. IBM PC, PC/XT, and PC/AT are registered trademarks of the International Business Machines Corporation. Printed in USA. Copyright 2001, 2006 by ACCES I/O Products Inc, 10623 Roselle Street, San Diego, CA 92121. All rights reserved. WARNING!! ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH THE COMPUTER POWER OFF.
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Page 3: Warranty
ACCES I/O LPCI-COM422-8 Get Quote Warranty Prior to shipment, ACCES equipment is thoroughly inspected and tested to applicable specifications. However, should equipment failure occur, ACCES assures its customers that prompt service and support will be available. All equipment originally manufactured by ACCES which is found to be defective will be repaired or replaced subject to the following considerations. -
Page 4: Table Of Contents
ACCES I/O LPCI-COM422-8 Get Quote Table of Contents Chapter 1: Introduction....................5 Specifications ......................7 Figure 1-1: Block Diagram (only one serial channel shown)............... 8 Chapter 2: Installation....................9 Chapter 3: Option Selection ..................11 Figure 3-1: Simplified Termination Schematic .................. 11 Figure 3-2: Low-Profile Model Option Selection Map................ -
Page 5: Chapter 1: Introduction
ACCES I/O LPCI-COM422-8 Get Quote Chapter 1: Introduction The card was designed for effective multipoint transmission in RS485 (EIA485) protocol. The card is 6.60 inches long and may be installed in an available 5V or 3.3V PCI expansion slot. The card features eight independent, asynchronous RS485 serial ports, type 16550 buffered UARTs, and, for Windows compatibility, automatic control to transparently enable/disable the transmission drivers. - Page 6 ACCES I/O LPCI-COM422-8 Get Quote Auto-RTS Transceiver Control In RS485 communications, the driver must be enabled and disabled as needed, allowing all cards to share a two wire cable. The card controls the driver automatically. With automatic control, the driver is enabled when data is ready to be transmitted.
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Page 7: Specifications
ACCES I/O LPCI-COM422-8 Get Quote Specifications Communications Interface • I/O Connection: 50 Pin SCSI D-Connector • Serial Ports: Eight cable terminated shielded male D-sub 9-pin connectors with standard IBM AT connectors compatible with RS485 specifications • Character length: 5, 6, 7, or 8 bits. - Page 8 ACCES I/O LPCI-COM422-8 Get Quote Figure 1-1: Block Diagram (only one serial channel shown) Manual LPCI-COM485-8 www.assured-systems.com | sales@assured-systems.com Page 8/25...
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Page 9: Chapter 2: Installation
ACCES I/O LPCI-COM422-8 Get Quote Chapter 2: Installation A printed Quick-Start Guide (QSG) is packed with the card for your convenience. If you’ve already performed the steps from the QSG, you may find this chapter to be redundant and may skip forward to begin developing your application. -
Page 10: Hardware Installation
ACCES I/O LPCI-COM422-8 Get Quote Hardware Installation Make sure to set switches and jumpers from either the Option Selection section of this manual or from the suggestions of SETUP.EXE. Do not install card into the computer until the software has been fully installed. -
Page 11: Chapter 3: Option Selection
ACCES I/O LPCI-COM422-8 Get Quote Chapter 3: Option Selection To help you locate the jumpers described in this section, refer to the Option Selection Map at the end of this section. Operation of the serial communications section is determined by jumper installation as described in the following paragraphs. -
Page 12: Data Cable Wiring
ACCES I/O LPCI-COM422-8 Get Quote Data Cable Wiring SignalPin Connection Ain- Aout+ Aout- 100 Ω to Ground Ain+ Baud Rate Ranges The jumper labeled X8CLK is provided to select baud rates in either of two ranges. When not installed, the baud rate range is up to 115,200 baud. When installed in the X8CLK, the baud rate range is 200 to 921,600 baud. - Page 13 ACCES I/O LPCI-COM422-8 Get Quote Figure 3-2: Low-Profile Model Option Selection Map Manual LPCI-COM485-8 www.assured-systems.com | sales@assured-systems.com Page 13/25...
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Page 14: Chapter 4: Address Selection
ACCES I/O LPCI-COM422-8 Get Quote Chapter 4: Address Selection The card uses one address space. COM A, COM B, COM C, COM D, COM E, COM F, COM G and COM H each occupy eight consecutive register locations. The interrupt register which indicates which port or ports caused the interrupt is located at base address + 64. -
Page 15: Chapter 5: Programming
ACCES I/O LPCI-COM422-8 Get Quote Chapter 5: Programming Sample Programs There are sample programs provided with the card in C, Pascal, QuickBASIC, and several Windows languages. DOS samples are located in the DOS directory and Windows samples are located in the WIN32 directory. - Page 16 ACCES I/O LPCI-COM422-8 Get Quote Initialization Initializing the chip requires knowledge of the UART's register set. The first step is to set the baud rate divisor. You do this by first setting the DLAB (Divisor Latch Access Bit) high. This bit is Bit 7 at Base Address +3.
- Page 17 ACCES I/O LPCI-COM422-8 Get Quote The second initializing step is to set the Line Control Register at Base Address +3. This register defines word length, stop bits, parity, and the DLAB. Bits 0 and 1 control word length and allow word lengths from 5 to 8 bits. Bit settings are extracted by subtracting 5 from the desired word length.
- Page 18 ACCES I/O LPCI-COM422-8 Get Quote Transmission RS485 transmission is simple to implement. The AUTO feature of the card automatically enables the transmitter when data is ready to send so no software enabling is required. The following software example is for non-AUTO operation.
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Page 19: Chapter 6: Connector Pin Assignments
ACCES I/O LPCI-COM422-8 Get Quote Chapter 6: Connector Pin Assignments Input/Output Connections The card uses a 50-pin SCSI D-connector to interface to a spider cable. The spider cable has eight individual DB9M connectors provided with it. To ensure that there is minimum susceptibility to EMI and minimum radiation, it is important that the card mounting bracket be properly screwed into place and that there be a positive chassis ground. - Page 20 ACCES I/O LPCI-COM422-8 Get Quote Signal Connector Pin Unused Pin 1 Ain/out+ Pin 2 Ain/out- Pin 3 Unused Pin 4 100 Ohm to Ground Pin 5 Unused Pin 6 Unused Pin 7 Unused Pin 8 Unused Pin 9 Table 6-2: Data Cable Wiring Manual LPCI-COM485-8 www.assured-systems.com | sales@assured-systems.com...
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Page 21: Appendix A: Application Considerations
ACCES I/O LPCI-COM422-8 Get Quote Appendix A: Application Considerations Introduction Working with RS422 and RS485 devices is not much different from working with standard RS232 serial devices and these two standards overcome deficiencies in the RS232 standard. First, the cable length between two RS232 devices must be short;... -
Page 22: Rs485 Data Transmission
ACCES I/O LPCI-COM422-8 Get Quote Parameter Conditions Min. Max. Driver Output Voltage (unloaded) Driver Output Voltage (loaded) LD and LDGND jumpers in Driver Output Resistance 50Ω Driver Output Short-Circuit Current +150 mA Driver Output Rise Time 10% unit interval Receiver Sensitivity... - Page 23 ACCES I/O LPCI-COM422-8 Get Quote Figure A-1: Typical RS485 Two-Wire Multidrop Network RS485 Four-Wire Multidrop Network An RS485 network can also be connected in a four-wire mode. In a four-wire network it's necessary that one node be a master node and all others be slaves. The network is connected so that the master communicates to all slaves and all slaves communicate only with the master.
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Page 24: Customer Comments
ACCES I/O LPCI-COM422-8 Get Quote Customer Comments If you experience any problems with this manual or just want to give us some feedback, please email us at: manuals@accesio.com. Please detail any errors you find and include your mailing address so that we can send you any manual updates. - Page 25 ACCES I/O LPCI-COM422-8 Get Quote Assured Systems Assured Systems is a leading technology company with over 1,500 regular clients in 80 countries, deploying over 85,000 systems to a diverse customer base in 12 years of business. We offer high-quality and innovative rugged computing, display, networking and data collection solutions to the embedded, industrial, and digital-out-of-home market sectors.
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