Safety Transmitters

United Electric Controls has added two DC-voltage switching models to its One Series Safety Transmitter line.

Aw 138392 1706np Unitedelectric

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

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