Omega Engineering RS-422/485 manual Appendix F Compliance Notices

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Appendix F - Compliance Notices

Appendix F - Compliance Notices

Federal Communications Commission Statement

FCC - This equipment has been tested and found to comply with the limits for Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in such case the user will be required to correct the interference at his own expense.

EMC Directive Statement

Products bearing the CE Label fulfill the requirements of the EMC directive (89/336/EEC) and of the low-voltage directive (73/23/EEC) issued by the European Commission.

To obey these directives, the following European standards must be met:

•

EN55022 Class A - “Limits and methods of measurement of

radio

 

interference characteristics of information technology equipment”

•

EN55024-‘Information

technology

equipment

Immunity

 

characteristics Limits and methods of measurement.

 

•

EN60950 (IEC950) - “Safety of information

technology

 

equipment, including electrical business equipment”

 

Warning

This is a Class A Product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

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.

OMG-ULTRA-COMM422

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Contents User’sGuide Mexico CanadaBenelux Czech RepublicContents Figures Introduction Factory Default SettingsOverview What’s IncludedAddress Selection Card SetupSwitch Port Port # Connector Location Address Example Base=2E0 Switch Settings Address lines à Address SelectedIRQ Selection Jumper SelectionsInterrupt Modes J1ARS-485 Enable Modes Headers J1D- J4D, RS-422 Interface Mode Examples J1D J4DHeaders J1D- J4D, RS-485 ‘RTS’ Enabled, with ‘No Echo’ Name Function Line TerminationDIV4 DIV2 Clock ModesFor this Data Rate Choose this Divisor Baud Rates and Divisors for the ‘Div1’ modeFor this Data Rate Choose this Data Rate Baud Rates and Divisors for the ‘Div2’ mode Other Operating Systems InstallationOperating System Installation For Windows Users Technical Description FeaturesModem Control Signal Considerations Interrupts Why use an ISP? DB-37 Connector Pin Assignments Connector Pin Assignments DB-9 Pin AssignmentsSignal Name Pin # Mode Port #Specifications Appendix a Troubleshooting OMG-ULTRA-COMM422 Appendix B How To Get Assistance RS-485 Appendix C Electrical InterfaceRS-422 Appendix D Asynchronous Communications Asynchronous Communications Bit DiagramAppendix E Silk-Screen Appendix F Compliance Notices WARRANTY/DISCLAIMER Temperature

RS-422/485 specifications

Omega Engineering is a renowned leader in the field of measurement and control technologies, particularly in the realm of data communication for industrial automation. The RS-422 and RS-485 protocols are part of Omega's robust offering, designed to facilitate reliable and efficient data transmission over relatively long distances. These protocols are widely used in various applications ranging from industrial machinery to building automation systems.

One of the main features of RS-422 is its ability to support long-distance communication, allowing data to be transmitted up to 4,000 feet (approximately 1,200 meters) at speeds of up to 10 Mbps. This is achieved through the use of differential signaling, which provides improved noise immunity compared to single-ended signaling systems. RS-422 employs a single transmitter and multiple receivers, making it ideal for point-to-multipoint configurations.

On the other hand, RS-485 extends the capabilities of RS-422 by allowing multiple devices to be connected on the same bus. It supports up to 32 devices, which can be either transmitters or receivers, making it exceptionally versatile for networking applications. RS-485 can communicate effectively over distances up to 4,000 feet and at speeds of 10 Mbps as well. This makes it an attractive option for applications where several devices need to communicate with a central controller.

An essential characteristic of both protocols is their resilience to electromagnetic interference, which is often a concern in industrial environments. The differential signaling used in RS-422 and RS-485 reduces noise susceptibility, ensuring data integrity even in challenging conditions. Additionally, these protocols function effectively in half-duplex or full-duplex modes, providing flexibility based on application requirements.

Moreover, Omega Engineering’s implementations of RS-422 and RS-485 comply with established standards, ensuring compatibility with a wide range of devices. This interoperability is crucial for seamless integration into existing systems and enhancing overall productivity.

In summary, Omega Engineering's RS-422 and RS-485 technologies offer robust, reliable, and versatile solutions for data communication in industrial settings. With features such as long-distance communication, multiple device connections, and exceptional noise immunity, these protocols continue to serve as foundational technologies in various automation and control applications. As industries evolve, Omega Engineering remains committed to advancing these technologies to meet the growing demands of modern data communication.
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