Instumentation • Computing • Control
also distinguishes itself with a very high level of connectivity. It provides built-in two port 10/100 Ethernet switches and an RS-232 and thus easily allows devices to seamlessly connect over a vast geographical distance. To extend the life of legacy equipment there are a number of tools included in the MRD-310 that will ensure connectivity with PLCs and other RS-232-based devices. Te unit supports both packet and circuit switched mode, Serial to IP conversion, Modbus Gateway, DNP3 Level 1 Outstation and Dial-Up modem emulation. Westermo currently has a local presence in more than 35 countries through authorised distributors and its own offices. Since 2008 the company has been part of the Beijer Electronics Group, a fast growing technology company with extensive experience of industrial automation.
High-performance solutions Te global economy and even society as a whole is more dependent on energy supply, particularly the oil and gas industry, than on any other branch of industry. It is vital to be able to optimally manage systems for oil production, for transport over thousands of kilometres, via pipelines or across the sea, as well as systems for its processing. Managing such systems is important for: early detection of technical downtimes; highly efficient, cost-saving operation of systems; remote querying of sensors and remote control of equipment; and early detection of threats, for example from terrorist attacks. Such considerations provide a variety
of increasingly stringent requirements for communications systems and requirements are exceeding pure voice applications, for example high-performance transmission of data at the same time as voice, prompt transmission of images, and interoperability between different systems Such requirements can only be met reliably in the future by digital communications systems, which are designed in accordance with the latest international and open standards and built as systems for mission- critical applications offering excellent security. With ACCESSNET-T, Rohde & Schwarz
is providing a secure and reliable tailor-made communications solution which can be relied upon even under extreme conditions. Te heart of every ACCESSNET-T communications system is the exchange system which includes: optimum scalability for every application, gateways to external networks (PSTN, PABX and ISDN), and access to application-specific add-ons.
Te backbone of a communications system is the base station that comes in indoor or outdoor
38
www.engineerlive.com
versions with a fixed or variable number of TETRA carriers. In addition, the company cites unsurpassed robustness that suits practically all environmental conditions, low weight and small space requirements, plus integrated drop and insert multiplexers without the need for external multiplexers
Te brain of the system is the control centre, which is also designed as a multi-user system. Te network management server (NMS) is integrated in every network element (exchange and base station). Access by clients to the NMS, directly or via LAN, involves using standard laptops with secured access. Te company also places a high priority on security. For example, security of the connection is maintained using redundancy solutions, hot swap and no single point of failure, and security of communications via encryption. Meanwhile Data-Linc has gone into full
production with its latest and newest addition to the FastLinc family of high-speed modems. Te FLC910E offers a new option in data transmission. Using orthogonal frequency division multiplexing (OFDM) technology and the robust 900 MHz ISM band, the FLC910E provides high data throughput and immunity to multi-path fading. It also looks to the future by providing a platform for another of Data-Linc’s high-speed products with the same footprint that will offer OFDM 802.11abgn capability.
Te company says that the FLC910E addition is an ideal data communication option for noisy in- plant environments. It handles data with a spreading method that utilises a wide number of carrier frequencies transmitted simultaneously, dividing signal data across exactly spaced carrier frequencies uniquely designed to have the exact minimum ‘orthogonal’ spacing. Tis ensures that each carrier frequency will not interfere with any other, and it is this precise space utilisation in the 900 MHz band that gives the FLC910E its robust, reliable performance. Te OFDM technology permits data transfer via a wide channel that supports complex modulation and the resulting high data rates (up to 54 Mbps) with low latency- the transmission time a data packet travels from point A to point B. OFDM also enables the FLC910E to be significantly more immune to multi-path fading caused by RF reflection that can be particularly troublesome in conditions that constrain data rates and reliability in standard 802.11 high-speed data systems. Te advantage of the 900 MHz band, wide-channel modulation and immunity to multi-path fading permits the FLC910E to provide high throughput rates while maintaining excellent resistance to noise. ●
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56