B&B Electronics 3PCIOSD1A, 3PCIOSD1B manual RS-485 Mode

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RS-422 Pinouts

The RS-422 mode supports 2 channels (transmit and receive).

Name

Description

Direction

DB25M

 

 

 

Pin

 

 

 

 

Shield

Shield

------

1

TD (A) −

Transmit Data A

Output

2

RD (A) −

Receive Data A

Input

3

GND

Signal Ground

------

7

TD (B) +

Transmit Data B

Output

14

RD (B) +

Receive Data B

Input

16

Table 2: RS-422/485 Pinouts

With 2-wire RS-485 mode operation, your connection cable must jumper TD(A) to RD(A) and TD(B) to RD(B). Connect from TD(A) and TD(B) to the Data A(−) and Data B(+) wires of your RS-485 network.

Note that the EIA RS-422 Specification labels data lines with an "A" and "B" designator. Some RS-422 equipment uses a "−" and "+" designator. In almost all cases, the "A" line is the equivalent of the "−" line and the "B" line is the equivalent of the "+" line. More information on RS-422 communications can be found in B&B’s free RS-422/485 Application Note (available on our websites).

RS-485 Mode

To configure the port for RS-485 mode, 8 jumpers must be set/checked. The following settings configure the port as RS-485:

1.Set four jumpers of JP2 (A-D) to the "422/485" (right) position.

2.Set the top jumper "TX" of JP4 to the “485” (right) position.

3.For 2-wire operation, set the second jumper "RX" of JP4 to the "485" (right) position (half duplex). For 4-wire operation, set it to the "422" position (full duplex, Receive enabled)

4.Set the JP1 Control jumper to select the type of RS-485 transmit driver control, automatic Send Data (SD) or RTS . Select SD control unless you are sure that your software requires RTS control.

Documentation Number 3PCIOSD1x-3903m Manual

Chapter 2

9

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

5.The bottom jumper "Termination" of JP4 switches the 120 Ω Termination resistor IN or OUT. Typically this resistor is not used. In some cases, using high baud rates and very long cables, termination is needed. See B&B’s free RS-422/485 Application Note, Termination section, page 16, for more information (available on our websites).

Figure 4 shows the jumper configuration to set the port for 2-wire RS-485 mode with *1 clock enabled.

 

JP2

422/ 485

 

JP1

A 232

 

 

CONTROL

B 232

 

 

422/ 485

SD

 

RTS(232)

C232

 

 

422/ 485

 

 

 

 

 

 

 

 

D232

 

 

422/ 485

 

 

 

 

MODES

 

 

TX 422

485

 

JP3

RX 422

485 JP4

 

I N

OUT

*4

*1

TERMI NATI ON

 

CLOCK

Figure 4. RS-485 Mode Jumper Settings RS-485 Pinouts

The pinouts in RS-485 mode are the same as those listed in Table

2:RS-422/485 Pinouts on the previous page.

Explanation of RS-485 Operation

In RS-485 mode, the transmit driver must be enabled to transmit, and set to a high impedance (tri-state) mode at the end of transmission. In two wire (half duplex) mode, the receiver is disabled during transmit, and enabled when not transmitting.

The 3PCIOSD1x card provides two methods of enabling/disabling the transmit driver, automatic Send Data (SD) control and Request To Send (RTS) control. With automatic SD control, the driver is enabled when data is sent. The driver remains enabled for the transmission time and ten data bits after data transfer is complete. The SD circuit automatically adjusts its timing to the baud rate of the data. With RTS control, software must assert the RTS line to enable the driver and de-assert to disable the driver. To select SD control for the port, place JP1 jumper in the “Send Data” (left) position. Place this jumper in the “RTS(232)” (right) position for RTS control.

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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 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 Introduction FeaturesSpecifications General InformationAccessories Silk Screen Plot of 3PCIOSD1x PCB Setup InspectionRS-232 Pinouts RS-232 ModeRS-422 Mode Name Description Direction DB25M PinRS-485 Mode Baud Rate Option Installing the CardRS-422 and RS-485 Termination RS-485 Network BiasingWindows 95 and Windows Windows InstallationClick Next. W95 Skip to step Select CD-ROM driveNext Removal of Card And Drivers Windows 2000 Professional Select Device Manager, then view the device list Removal of Card & Drivers Windows NTSelect Add/Remove Programs Open the Control Panel, select Ports Next Open System32 Removal of Card and DriverUSA Office TroubleshootingEuropean Office Port 1 I/O Schematic Appendix a 3PCIOSD1x I/O SchematicDocumentation Number 3PCIOSD1x-3903m Manual Appendix a Documentation Number 3PCIOSD1x-3903m Manual Appendix B Appendix B RS-232 & RS-422/485 PinoutsRS-232 Pinouts Name Description Direction RS-422/485 Pinouts Name Description DirectionJumpers RS-232 RS-422 RS-485 Appendix C Jumper Mode TableDocumentation Number 3PCIOSD1x-3903m Manual Appendix C Documentation Number 3PCIOSD1x-3903m Manual Appendix D Appendix D Troubleshooting with COMTestDocumentation Number 3PCIOSD1x-3903m Manual Appendix E Appendix E Isolation and GroundAppendix F Renaming COM Ports Win 95/98/ME Renaming PCI COM Ports Using the PnP COM Rename UtilityInstall the PCI/USB COM Port Utilities Using PnP COM RenameDocumentation Number 3PCIOSD1x-3903m Manual Appendix F Documentation Number 3PCIOSD1x-3903m Manual Appendix G Appendix G Declaration of Conformity

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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