B&B Electronics 3PCIOSD1B Installing the Card, RS-422 and RS-485 Termination, Baud Rate Option

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The receiver can also be enabled and disabled, a useful feature in two-wire communications to prevent the transmitted data from "echoing back" on its own receiver. The second jumper "RX" of JP4 determines the receiver mode. When the jumpers are placed in the “485” position, the "echo" is turned off. This is achieved by disabling the receiver when the transmit driver is enabled. Placing this jumper in the “422” position will hold the receiver enabled at all times. More information on RS-422 communications can be found in B&B’s free RS-422/485 Application Note (available on our websites).

RS-422 and RS-485 Termination

A120Ω termination resistor has been provided for the RS-422/485 receiver. Note that termination should only be used in systems with both high baud rates (>19200) and over several thousand feet of cable. If a value other than 120 Ω is desired, space for a through- hole resistor has been provided on the board adjacent to the surface mount termination resistor. This through-hole termination resistor is labeled as RTAB while the surface mount termination resistor is labeled as RTAA. See B&B’s free RS-422/485 Application Note, Termination section, page 16, for more information (available on our websites).

RS-485 Network Biasing

Biasing is required on an RS-485 network to hold the network in the marking state between transmissions. The 3PCIOSD1x RS-485 receiver is biased with a 4.7 KΩ pull-up resistor (R28A) on the Receive Data B line and a 4.7 KΩ pull-down resistor (R29A) on the Receive Data A line. These values are usually adequate for networks without termination and small numbers of nodes. For more complex networks, the user must calculate the required value and replace these resistors. Space for through-hole resistors has been provided over the top of the surface mount components placed at the factory. The through-hole resistor for the pull-up is marked as R28B and the pull-down is marked as R29B.

Documentation Number 3PCIOSD1x-3903m Manual

Chapter 2

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4 X Baud Rate Option

Baud rates higher than 115,200 are possible with the 3PCIOSD1x card in RS-232, 422, or 485 mode. Jumper JP3 controls the clock frequency supplied to the UART. By moving this jumper to the “*4” (left) position, the clock frequency is increased from 1.8432 to 7.3728 MHz. This multiplies all UART baud rates by 4 times. For example, if the software is set for 57.6K baud, the actual baud rate will be increased by a factor of four to 230.4K baud. In many systems, these higher baud rates can improve throughput significantly. However, remember that baud rates and actual throughput are only proportional if the system can keep up with the communications, otherwise increasing the baud rate effectively only increases the idle time between characters.

Installing the Card

1.Ground yourself by touching the metal chassis of the computer to discharge any static electricity.

2.Turn the power to your computer off and unplug the power cord.

3.Remove the cover of the computer.

4.Locate a free PCI expansion slot.

5.Remove the expansion slot cover. Save the screw for installation of the 3PCIOSD1x card.

6.Install the card into the unused slot. Be certain that the card is inserted completely (fully seated) in the slot.

7.Secure the card with the mounting screw from step 5.

8.Replace the cover, plug in the power cord, and power up the system.

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Chapter 2

Documentation Number 3PCIOSD1x-3903m Manual

B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

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Contents RS-232/422/485 Serial Card Table of Contents Features SpecificationsGeneral Information IntroductionAccessories Setup Inspection Silk Screen Plot of 3PCIOSD1x PCBRS-232 Mode RS-422 ModeName Description Direction DB25M Pin RS-232 PinoutsRS-485 Mode Installing the Card RS-422 and RS-485 TerminationRS-485 Network Biasing Baud Rate OptionWindows Installation Windows 95 and WindowsSelect CD-ROM drive Click Next. W95 Skip to stepNext Removal of Card And Drivers Windows 2000 Professional Select Device Manager, then view the device list Select Add/Remove Programs Windows NTRemoval of Card & Drivers Open the Control Panel, select Ports Next Removal of Card and Driver Open System32European Office TroubleshootingUSA Office Documentation Number 3PCIOSD1x-3903m Manual Appendix a Appendix a 3PCIOSD1x I/O SchematicPort 1 I/O Schematic Appendix B RS-232 & RS-422/485 Pinouts RS-232 Pinouts Name Description DirectionRS-422/485 Pinouts Name Description Direction Documentation Number 3PCIOSD1x-3903m Manual Appendix BDocumentation Number 3PCIOSD1x-3903m Manual Appendix C Appendix C Jumper Mode TableJumpers RS-232 RS-422 RS-485 Appendix D Troubleshooting with COMTest Documentation Number 3PCIOSD1x-3903m Manual Appendix DAppendix E Isolation and Ground Documentation Number 3PCIOSD1x-3903m Manual Appendix ERenaming PCI COM Ports Using the PnP COM Rename Utility Install the PCI/USB COM Port UtilitiesUsing PnP COM Rename Appendix F Renaming COM Ports Win 95/98/MEDocumentation Number 3PCIOSD1x-3903m Manual Appendix F Appendix G Declaration of Conformity Documentation Number 3PCIOSD1x-3903m Manual Appendix G

3PCIOSD1A, 3PCIOSD1B specifications

B&B Electronics, a leader in the field of industrial communications, has made significant strides in providing reliable solutions for data transmission, with their products being well-regarded across various industries. Among their most notable offerings are the 3PCIOSD1B and 3PCIOSD1A models, which are designed to facilitate seamless communication and enhanced connectivity in industrial environments.

The 3PCIOSD1B is an advanced serial device server that converts RS-232 or RS-485 serial communication to a TCP/IP protocol, enabling devices to communicate across standard Ethernet networks. This model boasts a robust architecture that supports multiple serial devices, making it ideal for applications that require the integration of legacy systems into modern networks. One of the standout features of the 3PCIOSD1B is its capability to support both dynamic and static IP addressing, allowing for flexible network configurations.

On the other hand, the 3PCIOSD1A is designed with similar functionalities but focuses on a slightly different range of connectivity options, primarily aimed at simplifying the connectivity of serial devices. This model also supports a variety of serial interfaces, which includes versatile baud rates and data formats to cater to specific application requirements. Both models are equipped with a web-based interface for easy configuration, monitoring, and management.

In terms of performance, both the 3PCIOSD1B and 3PCIOSD1A utilize advanced buffering techniques to ensure efficient data throughput and error handling, thereby providing a stable connection for continuous data flow. The durable metal casing of these devices is designed to withstand harsh industrial environments, ensuring longevity and reliability.

The integration of security features such as user authentication and encrypted data transmission is paramount in today’s connected world. Both models provide these security enhancements, making them suitable for sensitive applications dealing with critical data.

Overall, B&B Electronics’ 3PCIOSD1B and 3PCIOSD1A stand out due to their reliable performance, flexible connectivity options, and robust security measures. These devices play a crucial role in bridging the gap between legacy serial communications and modern Ethernet-based networking, making them indispensable tools for industries aiming to enhance their operational efficiencies and connectivity solutions.
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