Manuals / B&B Electronics / Computer Equipment / Network Card

B&B Electronics manual RS-422 & RS-485 Differential Signals, RS-422 Operation

Models: RS-422

1 61
Download 61 pages 14.7 Kb
Page 50
Image 50

Figure 6.3

RS-422 & RS-485 Differential Signals

In RS-422 and RS-485 modes, each signal is differential, when one line is high (4.4V) , the other is low (0V), they alternate voltage with data. The receiver is differential so that common mode noise picked up on the twisted pair of wires is cancelled. Receiver sensitivity is rated at 200mV. A separate signal ground/common connection provides a common mode reference for the transmitter and receiver. These factors provide reliable communications at much greater distances than RS-232.

RS-422 Operation

In RS-422 mode, the transmitter is enabled (TX ENABLE) all the time, and the receiver is enabled (RX ENABLE) all the time. Typical connections are for two devices, one device at each end. The transmit lines of one device are connected to the matching receive lines of another. The second device transmit lines are connected to the receive lines of the first.

In another common mode of connection, the transmit lines of the master device are connected to the receive lines of many listening slave devices. None of the listening devices reply to the master.

Documentation Number 3PCIO1-0903 Manual

Chapter 6

45

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

Page 49 Page 51
Page 50
Image 50
B&B Electronics manual RS-422 & RS-485 Differential Signals, RS-422 Operation
Page 49 Page 51

RS-422 specifications

B&B Electronics is renowned for its reliable and efficient solutions for industrial communication, and their Multi-Interface Ethernet Serial Servers stand out as versatile tools for connecting legacy serial devices to modern Ethernet networks. The compatibility with various serial communication protocols, including RS-485, RS-232, and RS-422, makes these servers indispensable in numerous applications that require reliable data transfer.

One of the main features of B&B Electronics Multi-Interface Serial Servers is their ability to support multiple serial communication standards. This flexibility allows businesses to integrate older equipment with newer technologies seamlessly. The servers can act as a bridge, ensuring that data from RS-232 devices can be transmitted over Ethernet networks without modification.

These servers also boast a robust design that is built for industrial environments. With an operating temperature range suitable for harsh conditions, they ensure uninterrupted service in settings such as factories or outdoor installations. The metal housing of the devices provides durability and protection from physical damage, ensuring long-lasting performance.

In terms of connectivity, B&B Electronics Multi-Interface Serial Servers come with numerous options to accommodate different network configurations. They support various IP addressing schemes, allowing for easy integration into existing network infrastructures. Their Ethernet compatibility means they can handle high-volume data traffic, making them ideal for applications that demand high-speed communication.

Another significant feature is their user-friendly configuration options. The servers can be configured via a web interface, providing an intuitive and straightforward approach for users to set up and manage their devices remotely. This feature is especially beneficial for businesses with distributed operations, as it allows for easy monitoring and management from a central location.

The serial servers also incorporate advanced technologies such as TCP/IP and UDP protocols, enhancing data transmission reliability. This ensures that even in instances of network interruptions, data is not lost, thus maintaining the integrity of information being communicated between devices.

In summary, B&B Electronics Multi-Interface Ethernet Serial Servers serve as a crucial link between legacy serial devices and modern Ethernet networks. Their flexibility, robust design, and user-friendly features make them a preferred solution for industries looking to improve their communications infrastructure and streamline their operations. With the integration of cutting-edge technologies, these servers not only meet the current demands but also adapt to future advancements in network communications.