EC: SSX/SST Safety Isolator and Splitter
Safety - Process safety, intrinsic safety: exida IEC 61508:2010 certified SSX 2-wire and SST 4-wire safety isolators and splitters from Moore Industries provide isolation and signal conversion for SIS, protecting and enhancing loops while passing valuable HART data from field transmitter to host systems. This is a Control Engineering 2014 Engineers’ Choice finalist.
The Moore Industries SSX 2-wire (loop powered) and SST 4-wire (line/mains powered) safety isolators and splitters were designed and built from the ground up in compliance with the strict IEC 61508:2010 standards for safety related applications and they are certified SIL 3 capable by exida for Safety Instrumented Systems. They isolate an SIS from a basic process control system (BPCS) or monitoring system so disconnections or failures to these secondary systems don't affect the safety system. They protect safety systems from surges, spikes and transients in the field. With 1,500 Vrms isolating capability, the SSX and SST protect safety I/O cards and systems from the rigors of plant environments. Failure modes, effects, and diagnostic analysis (FMEDA) reports provide the required safety data to ensure that risk reduction requirements are met.
The 4-wire SST splitter will split signals between two locations. It takes in one signal and provides two fully isolated outputs that can be taken to two separate receiving devices. This facilitates maintenance on either output loop without losing the signal on the other output loop.
Built-in HART pass-through technology ensures that when loops use HART transmitters, that critical and valuable HART diagnostic, process, and calibration information can be read on either side of the SSX or SST. Most other isolators block and "strip off" the HART signal. When used as a splitter, the 4-wire SST also passes HART data to both asset management systems, programming devices or host systems.
The 4-wire SST is also capable of providing loop power to a 2-wire transmitter that is connected to its input. Plus, standard 20 V/m RFI/EMI protection is provided on both the SSX and the SST to protect against harmful effects of radio frequency and electromagnetic interference.
- Events & Awards
- Magazine Archives
- Oil & Gas Engineering
- Salary Survey
- Digital Reports
Annual Salary Survey
After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.
The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.