EC: One Series Safety Transmitter

Safety — Process Safety, Intrinsic Safety: The One Series Safety Transmitter is aSIL 2 certified pressure and temperature transmitter for functional safety systems. This is a Control Engineering 2015 Engineers’ Choice award winner.


United Electric Controls One Series safety transmitterThe One Series Safety Transmitter provides much more than the process variable to the PLC. In addition to the NAMUR standard 4 to 20 mA analog signal, there are switched and diagnostic outputs available. The internal safety relay output (SRO)—rated at 5 A, 250 Vac—can provide a high speed trip directly to a final control element at a programmed value (set point). This feature allows designers to create independent protection layers (IPLs) where the SRO acts directly on the final element (i.e., actuator, relay or a start/stop circuit) to control a valve or pump without processing the trip signal through the PLC. This saves precious time and allows an alarm or shutdown to occur in less than 100 msec, closer to the point of measure. Diagnostic coverage of the SRO is provided by monitoring the final element and determining if current flowing through it is within range. The SRO monitor feature can detect an open or shorted SRO.

Complementing the SRO are two additional fail-safe outputs providing diagnostic and set point status, facilitating the use of voting logic applications. When monitored by a safety PLC, these discrete outputs allow the One Series Safety Transmitter to achieve a high safe failure fraction (SFF) of 98.8%, the highest of any transmitter certified for use in SIL 2 safety systems as a single element (HFT=0).

Unlike process transmitters re-purposed for plant safety, the One Series Safety Transmitter was designed specifically for functional safety applications using the latest available version of the IEC 61508-2010, 2nd edition standard and certified by exida. The meaning of this to owner/operators and their safety designers is that they can have even greater confidence in hardware assessed under the latest IEC 61508 standard.

United Electric Controls, 

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Make Big Data and Industrial Internet of Things work for you, 2017 Engineers' Choice Finalists, Avoid control design pitfalls, Managing IIoT processes
Engineering Leaders Under 40; System integration improving packaging operation; Process sensing; PID velocity; Cybersecurity and functional safety
Mobile HMI; PID tuning tips; Mechatronics; Intelligent project management; Cybersecurity in Russia; Engineering education; Road to IANA
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
click me