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In the IoT world, the number of devices being connected to networks is growing. However, there is a tradeoff that must be considered when seeking to connect everything together. In this case, the tradeoff is between connectivity and security.
The ’IP’ in IP codes, or sometimes called IP ratings, stands for ”Ingress Protection”. These codes rate the degree of protection that a housing offers from objects such as dust and water. These ratings are defined by the IEC 60529 Standard. The standard makes it possible to quantify the degree of protection instead of using a subjective terms
When using or installing any RS-232 port powered device, it is important to keep a few things in mind. The two main items are the Power Available from the RS-
232 port and the Power Dissipated by the RS-422 or RS-485 system.
There are multiple options for expanding the capability of a port that was designed to communicate with only one device. Using a Buffered Smart Switch, such as BB-232BSS4, is an excellent way to collect data from multiple devices by utilizing RS-232 serial ports.
Media converters play an important role in today’s multiprotocol, mixed media Local Area Networks (LAN). For example, LAN administrators can deploy media converters to integrate fiber optic cabling and active equipment into existing copper-based, structured cabling systems while achieving significant cost-savings.
Ethernet’s simple and effective design has made it a popular industrial networking solution at the physical and data link levels. With high-speed and high-bandwidth options and a variety of media types to choose from, Ethernet is efficient and flexible.
In some commercial and industrial data communications applications, hardwiring devices together is not practical. Long distances, inaccessibility and frequent relocation of devices are a few situations that can complicate applications.
Thinking networks will ultimately be able to deliver just about any data, just about anywhere and the transmission methods involved will be completely transparent to the end user, whether that end user is a machine or a human being.
This article will review serial device server technology’s usefulness and drawbacks and demonstrate how to access serial data from locations that are either remote or restricted and, thus, out of range of a Wi-Fi network.
What is an industrial bus? Traditionally, the industrial bus has been used to allow a central computer to communicate with a field device. The central computer was a mainframe or a mini (PDP11) and the field device could be a discreet device such as a flow meter, temperature transmitter or a complex device such as a CNC cell or robot.
Ethernet has a zillion buzzwords, plenty of strange abbreviations, acronyms and “short hand”. For example, “10BASE-T” means 10 Megabits per second, baseband, twisted pair. This glossary is a collection of the most common terms that you encounter when working with Ethernet and networking, in general.
B+B SmartWorx labels the data lines on RS-422 and RS-485 with an “A” for negative or “B” for positive, to indicate the positive and negative relationship between the two data lines. It is important to label the data lines because this positive and negative relationship between the lines must be maintained when connecting one device to another.
The B+B SmartWorx Model 485OPDRi is an RS-422/485 industrial optically isolated repeater. While often used in Modbus applications, it may be configured for use in the DH-485 environment as a limited replacement for the 1747-AIC.
The B+B SmartWorx Model 485DRCI is an industrial RS-232 to RS-422/485 converter. While it is often used in Modbus applications, it may be configured for use in the DH-485 environment as a limited replacement for the 1761-NETAIC.
The fine art of converting a continuous analog signal into synthesized discrete digital information (a mouthful for A/D conversion) involves two important accuracy considerations. It also reflects the characteristics of the sampled analog signal.
The intent of this White Paper is to provide an understanding of MTBF and other product reliability methods. Understanding the methods for the lifecycle prediction for a product enables the customer to consider the tangible value of the product beyond set-features before purchasing it.
The original 8-bit parallel port was developed by IBM in 1981 as a faster interface to dot matrix printers than the then standard one-bit serial port. The parallel port greatly increases transfer speeds by using an eight-wire connector that transmits the eight bits in a byte of data simultaneously,
The benefits of PoE include increased mobility for end devices, added safety (no AC power involved), simplicity of installation, reliability, security and cost savings. These advantages have led to the development of a variety of new PoE-enabled products.
Selecting data cable for an RS-422 or RS-485 system is not difficult, but often gets lost in the shuffle of larger system issues. However, care should be taken because intermittent problems caused by marginal cable can be very difficult to troubleshoot.
Newer protocols like USB and Wi-Fi have not driven older protocols like RS-422/485 off the streets; they merely share the right of way. There are still some things that serial communications do so well.
When choosing data line protection for a system, it is important to consider all available options. There are pros and cons to both surge suppression and optical isolation. However, isolation is a more effective solution for most systems.
With today’s technology, the possibility of a wireless industrial data communication environment is stronger than ever. Issues that had plagued the wireless option are being minimized, especially as proprietary RF becomes fine-tuned to address specific challenges.
The use of fiber optics in telecommunications and wide area networking (WAN) has been common for many years. But more recently, fiber optics have also become increasingly prevalent in industrial data communication systems. High data rate capabilities, noise rejection and electrical isolation.
Isolated USB protects your computer’s USB port from dangerous ground loops and provides data integrity in electrically noisy environments; such as near a variable frequency motor drives, welding or other large loads. When using USB isolation, consider your bandwidth, downstream power and cascade requirements.
USB may have been designed for the office environment, but it does not have to stay there. Just isolate, convert, extend and connect. If you do it correctly, you can take USB all the way out to the industrial network edge. Tips on how to exploit the benefits of USB while eliminating its weaknesses
Surges and spikes on datalines can fry your communications boards and garble data. This article describes the operation, installation and selection of what is probably the most common method of dataline protection. Surge suppressors divert excess energy away from the port being protected into a ground connection.
“Universal Serial Bus” (USB) — an external connectivity communications technology for linking peripherals such as mice, keyboards, modems, joysticks, video and more to Macintosh and PC computers. It has gained favor commercially and privately since its development in 1994.
Modbus is one of the most popular protocols used in the industrial world. Supporting traditional serial protocols of RS232/422/485 and Ethernet protocols allow industrial devices such a PLCs, HMIs and meters to use Modbus as their communication method.
It is getting very hard to find a new computer that ships with a built-in serial port these days. In the home/office environment, the older serial protocols have been largely supplanted by the newer, high-speed Universal Serial Bus (USB). That is a problem in the industrial world, where equipment still needs RS-232/422/485 interfaces to communicate
This diagram shows how Ethernet cable color coding works. Alter cables at your own risk. Ethernet cable color-coding exists as part of the industry standard - T568A/T458B. Standards exist so technicians can know how the cable should work and can reliably alter the cable when necessary.