With the ability to directly switch 24 VDC and 125 VDC as well as 250 VAC loads, the transmitters 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. They reduce cost and improve safety by embedding a process sensor, logic solver and safety relay in a single, SIL 2-certified field device. The ability to switch final elements such as valves, motors, and blowers directly from the transmitter minimizes response time while eliminating the wiring needed to route a shutdown or alarm response through a PLC or another safety controller. Transmitters can now be specified for either pressure or temperature monitoring at 12-250 VAC @ 5 mA-5 A (Model 2SLP47); 0-30 VDC @ 6 A, 1.8 A Pilot Duty (Model 2SLP48); and 0-130 VDC @ 2.5 A, Q1501 Pilot Duty (Model 2SLP49). All units provide 4-20 mA NAMUR NE 43 standard output with diagnostics. They 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 less than 100 ms.
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United Electric Controls
www.ueonline.com
617.926.1000
