Approved Business Logo
Login

Approved Business uses its own and third parties’ cookies in order to improve your experience and our services. These cookies provide a better performance, enhanced features and enable certain functionalities. You can obtain more information and learn how to change the configuration of your browser, including how to block some cookies, in our Privacy Policy. However, you should know that blocking some types of cookies may impact your experience on the site and limit the services we are able to offer.

Lee-Dickens Namur NE43 Trip Amplifiers Achieves SIL2 Rating

05 November 2013 | Lee-Dickens Ltd

Lee-Dickens Namur NE43 Trip Amplifiers Achieves SIL2 Rating

Trip amps comply with NAMUR NE43 recommendations and meet IEC61508 safety requirements

Lee-Dickens, the UK instrumentation manufacturer, announces the launch of four new trip amplifiers that comply with the NAMUR NE43 recommendations.

Furthermore, these high quality non-processor based trip amplifiers have been assessed to IEC61508 by the independent safety integrity consultant Areva Risk Management Consulting Ltd and achieve SIL2 rating with a proof test interval of one year.

The NAMUR NE 43 recommendation document has been produced by the NAMUR members and sets out to define the “Out of Range” figures that are to be used with the industry standard 4 to 20mA signal. Lee-Dickens has taken these figures and produced four trip amplifiers that have the standard process trips as well as an independent “out of range” trip. The “out of range” trip is activated when the input signal either falls below 3.8mA or exceeds 20.5mA.

The latest SIL rated instruments are the BD9431and the BD9432, which are AC powered Single and Dual Level Trip Amplifiers respectively, and the BM9431 and the BM9432, which are DC powered Single and Dual Level Trip Amplifiers respectively.

LEE-DICKENS LTD
Desborough, Kettering, Northants, NN14 2QW
Tel: (01536) 760156 Fax: (01536) 762552

Amplifiers also include a forth trip relay that is activated when the power is applied to the instrument.

SIL Ratings

Safety integrity levels refer specifically to the probability of failure on demand (PFD) - or to what extent the end user can expect his process to perform safely, and in the case of failure, fail in a safe manner. By selecting devices that are rated for use within a desired SIL environment, end users can optimise their processes for risk.

The advantage for end users selecting a product with a SIL rating and accompanying assessment summary is that reliability calculations are already performed and available to the end user. The user also has the security of knowing that a third party has reviewed the reliability statistics for the product, and most importantly the attached certification report that accompanies each product contains important information ranging from restrictions of use and also reliability statistics.

Other Press Releases from Lee-Dickens Ltd

05/10/2022 - Airways New Zealand purchase Midi-10 RTUs to monitor Air Traffic Management systems. ACNZ purchased a batch of Midi-10 RTUs in 2020, and having successfully deployed them around New Zealand have ordered another large batch for delivery later this year.
05/10/2022 - Rolls-Royce Bronze Award Rolls-Royce Submarines relaunched their suppliers ‘Going for Gold’ awards process in 2020.
04/10/2022 - New RTU Offering PLC-style Automated Controls We have released a new Intelligent RTU to complement our exisisting range. The Midi-10 is ideal for use with the Sitewatch Anywhere Cloud-based solution.
04/10/2022 - New small-sized low-power RTU launched We are pleased to announce that we have added a small-sized RTU to our range.
07/10/2019 - South Holland Internal Drainage Board (SHIDB) Telemetry System Lee-Dickens has been awarded a contract to replace the existing South Holland Internal Drainage Board (SHIDB) telemetry system with a Sitewatch Telemetry and SCADA system.