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STA: SIL 2 and SIL 3 Capable Programmable Current/Voltage and RTD/Thermocouple Safety Trip Alarms

STA: SIL 2 and SIL 3 Capable Programmable Current/Voltage and RTD/Thermocouple Safety Trip Alarms
Part of the Moore Industries FS FUNCTIONAL SAFETY SERIES, the exida® SIL 2 and SIL 3 certified STA Safety Trip Alarm performs as a logic solver and acts on potentially hazardous process conditions; warns of unwanted process conditions; provides emergency shutdown; or provides on/off control in Safety Instrumented Systems (SIS) and traditional alarm trip applications.
Published: January 11, 2018

Sharing Process Variables: HART Functionality

Problem: When sharing a Process Variable (PV) with single or multiple systems, the connection needs to be thought out carefully especially when considering additional scenarios to this application: HART functionality and Safety Instrumented Systems.

Published: January 9, 2018

SDY: PC-Programmable Signal Isolator/Converter with Display

SDY: PC-Programmable Signal Isolator/Converter with Display
PC-Programmable Signal Isolator/Converter with Display
Published: January 5, 2018

E-HELP: Isolating Feedback on VFDs

E-HELP: Isolating Feedback on VFDs
Q: We are a boiler/burner company dealing with a rising amount of computer-based burner controls. We have installed several and have some blowers that are controlled by VFDs (Variable Frequency Drives). We have run into issues with noise on certain systems. We get occasional problems with 4-20mA feedback from the VFD despite going through the proper grounding techniques. We are wondering if installing an opto isolator on the feedback loop might eliminate our issue. We have used the SIX Signal Isolator many times on the signal going to the VFD to offset impedance issues on the VFD. Can we put an opto isolator on both signals?
Published: January 3, 2018

SRM: Safety Relay Module (4-Wire)

SRM: Safety Relay Module (4-Wire)
Part of Moore Industries’ FS FUNCTIONAL SAFETY SERIES, the SRM Safety Relay Module provides a high level of availability for safety-critical applications and as a part of Safety Instrumented Systems (SIS).
Published: December 14, 2017
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