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EHELP: STA Analog Output Protection

EHELP: STA Analog Output Protection
Q:  In specifying the Moore STA / HLPRG / 3PRG / U / -AO [DIN] our end user has a concern about electrical protection for the analog output. The desire is to use 4-20mA Output Loop Voltage sourced by DCS for the AO; however, this voltage may fault at up to 132 VAC. Should our design add fuse protection in the external voltage circuit upstream of the STA to protect it from these surges? Or does the STA include features that protect it from these faults?
Published: October 4, 2016

Burner Management System Signal Splitter Application for a Pulp and Paper Mill

Pulp and Paper Industry

Burner Management System Signal Splitter Application for a Pulp and Paper Mill

A pulp and paper mill had a black liquor BMS (Burner Management System) that per NFPA 85 requires that its safety logic system be totally independent from other logic systems.  The challenge was they required that key temperature and pressure signals also get monitored and recorded by their BPCS (Basic Process Control System). Learn how Moore Industries solved this problem.

Published: September 28, 2016

Moore Industries SIL 3 Capable STA Safety Trip Alarm Certified by exida®

Moore Industries SIL 3 Capable STA Safety Trip Alarm Certified by exida®

Part of the Moore Industries FS FUNCTIONAL SAFETY SERIES, the exida® certified SIL 2 and SIL 3 capable 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. The STA has a systematic integrity up to SIL 3 and random integrity up to SIL 2 which allows the STA to be used in a redundant architecture (1oo2, 2oo3, etc.) up to SIL 3.

Published: June 8, 2016

EHELP: Using the STA for a high temperature Safety Instrumented Function

EHELP: Using the STA for a high temperature Safety Instrumented Function

Q. Currently we monitor the temperature level in our oven with a thermocouple and let our PLC control the oven. We now need to implement a high temperature Safety Instrumented Function (SIF).  Do we need duplicate temperature sensors and do you have a Functional Safety device that can provide oven shutdown capability on high temperature?

Published: May 24, 2016

Problem Solver: Using the STA as a Single Loop Logic Solver (SLLS)

Problem Solver: Using the STA as a Single Loop Logic Solver (SLLS)
If you need to know how to implement several temperature related IEC 61511 compliant Safety Instrumented Functions (SIF) in your plant, the Using the STA as a Single Loop Logic Solver (SLLS) Problem Solver can help. It addresses how to utilize single loop logic solvers in your Safety Instrumented Systems (SIS) using Moore Industries’ SIL 2 and SIL 3 capable STA and offers an overview of equipment setup.
Published: April 12, 2016
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