One Series Safety Transmitters offer response time of less than 100 msec.
Press Release Summary:
Capable of switching 24 VDC, 125 VDC and 250 VAC loads and SIS elements directly, One Series Safety Transmitters offer SIL 2-certified control of pilot valves, actuators and motor controllers without DCS or safety PLC. Designed with process sensor, logic solver and safety relays, unit’s SROs are available in 2SLP47, 2SLP48 and 2SLP49 models for handling 0-30 VDC at 6 A current and 0-130 VDC at 2.5 A.
Original Press Release:
United Electric Controls Extends Safety Shutdown and Alarm Control to Field-based DC-controlled Final Elements
United Electric Controls (UE,) a leading producer of safety, alarm and shutdown technology, has added two DC-voltage switching models to its One Series Safety Transmitter (ST) line. With its ability to directly switch 24 VDC and 125 VDC as well as 250 VAC loads, the One Series ST models can now provide SIL 2-certified control for many types of final elements including pilot valves, actuators, motor controllers and other SIS elements, without involving a DCS or safety PLC.
“Many control schemes are transitioning to low-voltage equipment, primarily to reduce electric shock hazards in the plant or are looking to improve response time and reduce costs by switching final elements directly from the transmitter. By enabling switching of 24 VDC and 125 VDC final elements from our safety transmitters, we’ve made it possible for more companies to add simple and cost-effective SIL 2 safety loops in the field where a PLC or DCS may not be available,” said Wil Chin, Vice President of Marketing and Business Development, United Electric Controls, adding that the ability to directly control legacy equipment that utilizes 125 VDC control schemes is especially valuable to power plants.
One Series safety transmitters reduce cost and improve safety by embedding a process sensor, logic solver and safety relay in a single, SIL 2-certified field device. Although it looks like a traditional temperature or pressure transmitter, the ST can also switch final elements such as valves, motors, and blowers directly from the transmitter, maximizing response time while eliminating the wiring inherent in having to route a shutdown or alarm response through a PLC or another safety controller.
To address the growing demand for lower voltage switching of 24 VDC equipment, United Electric Controls has now added a Safety Relay Output (SRO) capable of handling 0-30 VDC at 6 amperes. To meet the needs of customers who were using 125 V DC equipment, most of whom are in the power industry, UE has added an SRO capable of switching 0-130 VDC at 2.5 amperes. With these additions, One Series Safety Transmitters models can now be specified for either pressure or temperature monitoring at any of the following current levels:
- 12-250 VAC @ 5 mA-5 A (Model 2SLP47)
- 0-30 VDC @ 6 A, 1.8 A Pilot Duty (Model 2SLP48)
- 0-130 VDC @ 2.5 A, Q1501 Pilot Duty (Model 2SLP49)
All One Series Safety Transmitters provide 4-20 mA NAMUR NE 43 standard output with exclusive “I Am Working™” diagnostics. The transmitters are certified for use in SIL 2 safety instrumented systems, and are capable of SIL 3, per IEC 61508. They have configurable self-diagnostics and achieve a safe failure fraction of 98.8%. Additional low-level discrete outputs communicate health and set point status, ideal for voting logic schemes. Instrument response time is <100 milliseconds.
See the complete line of One Series Safety Transmitters at the Global Petroleum Show, in Calgary, Canada, June 13, 2017 to June 15, 2017, booth 4341 in the Upper Big 4. For detailed specification on One Series Safety Transmitters, visit http://www.ueonline.com/one-series-safety-transmitter.html or call +1-617-926-1000.
About United Electric Controls
United Electric Controls (UE,) a privately held corporation founded in 1931 and headquartered in Watertown, Massachusetts, USA, is a global supplier of WirelessHART gas detectors, electronic transmitter-switches, pressure and temperature switches, transmitters, sensors and controls for the process, discrete, semiconductor, aerospace and defense industries. Focused on protecting equipment, processes, personnel and the environment, our products are critical for safety, alarm and shutdown functions with uncompromising quality produced from innovative design and superior lean manufacturing. For more information about United Electric Controls, call +1-617-926-1000 or visit the UE website at www.ueonline.com.
Contact:
United Electric Controls
180 Dexter Avenue
PO Box 9143
Watertown, MA 02472-9143
USA FAX +1-617-926-2568
Telephone +1-617-926-1000
Web Address: www.ueonline.com
