One of ATi’s key aims is to offer customers the most advanced and reliable technology on the market, and our Profibus technology is no exception.
Since we introduced the option of Profibus to all of our monitors in 2010, we have listened to your comments and researched market place issues to introduce the Profibus DP and 24VDC, which resolves all issues and concerns, making it more robust, reliable and much easier to maintain.
Issues with other Profibus monitors
Most other Profibus monitors on the market have a number of disadvantages:
- If one monitor fails, the whole network is lost. Many installers fit several spurs in the network and use junction boxes to get around this problem. This is costly and defeats one of the big advantages of Profibus – reduced wiring.
- Most “simple” connectors give no control over the bend angle of the cable into the monitor, resulting in signal degradation.
- Most monitors do not allow for simple disconnect from a network for maintenance.
ATi has addressed and resolved these issues when developing our Profibus technology by consulting with water companies, the Profibus foundation, Profibus forums and installers and found that many of the issues were related to connectivity, mostly occurring just after installation.
Benefits of ATi’s Profibus 24VDC and DP
The major benefit is that ATi uses a very high quality IP67 D9 bulkhead connector and most other suppliers use a cheaper termination block inside the monitor. For only a few pounds more per installation, our technology guarantees you increased efficiency, a system that is easier to install, cheaper and simpler to maintain and with less risk of plant network failure. Other features and advantages of the ATi DB9 Profibus include:
- Allowing any individual monitor in the network to be dropped out of the loop for maintenance or fault finding without causing the loss of the entire loop, unlike the technology that uses the cheaper connector. ATi’s technology then allows a user to quickly tap into the connector on a live system to scan or diagnose the network on portable ProfiTrace tools - without disturbing any node or the network integrity. External DB9 connectors are also commonly available with built-in diagnostic LEDs that will show network activity on the ATi monitor without actually having to open the enclosure.
- A specification that outlines bend angle limits, cable routing and exact connection points, which are crucial for maintaining signal quality. Other monitors that use the simpler terminal block connection are far more likely to suffer from an incorrect bend angle on the Profibus cable. The Profibus protocol does specify limits to cable bend angles, but most operators are not aware of the limits during installation. Competitive monitors will typically bend, route, and terminate the cable any way they can to squeeze it into the instrument enclosure, resulting in poor signal quality at high baud rates and regular network failures. The ATi DB9 Profibus application resolves all of these issues.
- Reduced costs and wiring. In a standard supplied Profibus system, the only way to allow individual disconnection and trouble shooting is to use expensive junction boxes and create Profibus spurs. Therefore, in order to get the same functionality as an ATi loop, it would cost more and work less effectively. It also goes against one of the reasons for using Profibus – reduced wiring.
- A connection scheme that maintains a perfectly shielded environment for the cable connection. When terminating standard Profibus cables, the conductor ends are exposed from their protective cable shields. Terminating the exposed conductors directly to terminal strips inside the instrumentation product means that the conductors are exposed to any electromagnetic interference (EMI) that may be present inside the product, such as power and relay wiring. This can be a big issue if the Profibus termination point is on a moving part of the instrument, like the inside of the door where the cable must move whenever the door is opened or closed. Anything radiating inside the enclosure can easily reach this exposed cable. In contrast, the ATi conductor is completely shielded in a contained EMI environment inside a metal DB9 connector, outside of the product. It is always in a fixed position, maintains perfect EMI protection and connection, and cannot be affected by wiring inside the product.
As always, ATi aims to be at the forefront of researching and providing new technology that benefits you, our customers. In short, our Profibus DP and 24VDC technology is far superior to standard systems due to its advanced and improved connectivity, it is easier to install, cheaper and simpler to maintain and almost eliminates any risk of plant network failure.
For any further information, please contact us on 0800 8046 062 or visit www.atiuk.com.