Connect Tech JB2, JB0, JB1, JB3 user manual Full Duplex Mode, Half Duplex RS-485

Page 30

4-10 Chapter 4: Appendices – RS-485/422 Interface

Full Duplex Mode

By not installing pins on jumper block JA and by using features in our driver software, you can run the individual RS-485/422 ports in full duplex mode. This mode is typically used in point to point RS-485/422 situations much like RS-232. In this mode, TxD & RxD are active all the time. Figure 1 shows the location of jumper block JA.

Half Duplex RS-485

By installing pins on jumper block JA and using features in our driver software, you can run the individual RS-485/422 ports in half duplex mode. In this mode your Titan/cPCI adapter controls the transmitter and receiver circuits. DTR is turned on prior to and during transmission to cause the transmit driver to enable and the receiver to disable. DTR is turned off when not transmitting to cause the transmit driver to disable (tri-stated) and the receiver to enable. The 16C950 UARTs on the Titan/cPCI adapter are responsible for timing the DTR toggle.

Multi-drop Slave Mode

By not installing jumpers on jumper block JA and by using features in our driver software, you can run the individual RS- 485/422 ports in multi-drop slave mode. In this mode the TxD line driver is enabled only when data is transmitted and RxD is enabled all the time. This mode is typically used in multi-drop "4 wire" connections.

Example

The example below shows the settings on JA where RS-485 ports 1 and 2 are set for full duplex or multi-drop slave mode, port 3 is set for half duplex and port 4 is not set since port 4 is set for RS-232 on jumper block JB.

JA

JA0

Port 1

JA1

Port 2

JA2

Port 3

JA3

Port 4

Jumper Legend

Jumpers on = ½ duplex enabled

4 port models

Technical Note:

Full duplex, multi-drop slave and half duplex modes apply to RS-485/422 ports only. Please ensure that the port is set for RS-485/422 on jumper block JB.

Titan/cPCI User’s Manual, ver. 0.00

Image 30
Contents Connect Tech Inc Multi-port Serial Communications AdaptersThis page is intentionally blank Limited Warranty Copyright Notice Trademark AcknowledgmentTable of Contents List of Tables List of FiguresAppendices Introduction Manual OverviewConventions & Symbols Features Product OverviewTitan/cPCI Adapters Titan/cPCI adapters Customer Service Overview Titan/cPCI SoftwareProblem Description Connect Tech Product Description System DescriptionMail/Courier Email/InternetTelephone/Facsimile RMA Overview Hardware Installation ConfigurationBaud Rate Selection Multi-drop Slave Mode Full Duplex ModeHalf Duplex Mode RS-485/422 Line InterfaceInstalling the Titan/cPCI Adapter in your System This page is intentionally blank Software Installation This page is intentionally blank Appendix a Specifications Dimensions Connectors/InterfaceTitan/cPCI Part Numbers Certification Titan/cPCI-2 Titan/cPCI-4General This page is intentionally blank Appendix B Connectors/Pinouts Connector PinoutsDB-37 cable connector pinouts Appendix C Factory Settings Function Factory SettingThis page is intentionally blank Appendix D RS-485/422 Line Interface Electrical Interface SelectionHalf Duplex RS-485 RS-485/422 partial schematic Technical Notes RS-485/422 Cable Wiring RS-485/422 wiring diagram 4 wireRS-485/422 wiring diagram 2 wire Titan/cPCI User’s Manual, ver Titan/cPCI User’s Manual, ver

JB0, JB2, JB3, JB1 specifications

Connect Tech’s JB series, comprising the JB1, JB2, JB3, and JB0, represents a versatile range of computing platforms designed for rugged and demanding applications. These products are specifically engineered to support various industries, including transportation, defense, and industrial automation, where reliability and performance are paramount.

The JB1 model serves as an entry-level option that already packs a punch in terms of features. It includes a robust design that’s resistant to environmental factors, such as humidity and temperature variations. The JB1 is equipped with a high-efficiency power management system that extends operational durations, making it ideal for mobile and remote applications.

Moving up, the JB2 adds more processing power and connectivity options. This model supports a wider array of peripherals and can handle complex data processing tasks. The JB2 is tailored for applications that require real-time data collection and analysis, featuring integrated sensors and multiple I/O ports. Its compact design allows for easy installation in limited spaces while ensuring optimal airflow for thermal management.

The JB3 model is tailored for high-performance environments that demand exceptional computational capabilities. It introduces advanced GPUs for graphic-intensive applications and supports more demanding software. The JB3 also provides enhanced networking capabilities, including dual Ethernet ports and wireless connectivity options, ensuring seamless data transmission in critical situations. Its rugged construction makes it suited for outdoor operations, capable of withstanding shock and vibration.

Lastly, the JB0 model epitomizes flexibility and scalability. This platform is meant for firms looking for customization options without compromising on performance. The JB0 can be configured with different processing units and storage capacities, accommodating a range of application needs. It also features a modular design, allowing seamless upgrades as technology evolves or additional functionalities are required.

All models in the JB series benefit from Connect Tech's commitment to stringent quality standards. They are designed to operate efficiently in harsh conditions while maintaining compliance with industry standards. Whether it’s the compact durability of the JB1, the enhanced processing of the JB2, the high-performance capabilities of the JB3, or the configurability of the JB0, the Connect Tech JB series offers something for every industrial need, ensuring reliable performance no matter the environment.