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Universal Power Supply Added to STA

Universal Power Supply Added to STA
The STA Safety Trip Alarm datasheet and installation manuals have been updated. The new change reflects the addition of a Universal power supply to the unit. Previously, customers needed to select either a 24DC or UAC power supply. The new Universal power supply accepts any power input range between 21.6-375Vdc or 90-260Vac.
Published: October 5, 2015

E-HELP: Using the CPA to Create a Temperature Switch

E-HELP: Using the CPA to Create a Temperature Switch
Q: I am looking for a device to create a temperature switch. I currently use a simple temperature switch with a 230°F setting, but at times the temperature of the unit goes over 400°F briefly and destroys the switch. I need to be able to hook a thermocouple up to the device and program a setpoint (with no display required) and have a set of dry contacts open when the temperature rises above the setpoint.
Published: September 18, 2015

Learn When Logic Solvers Are Appropriate for Overpressure Protection Systems

Learn When Logic Solvers Are Appropriate for Overpressure Protection Systems
An overpressure situation in pipes is dangerous and can lead to significant damages to property, pipe ruptures and even injuries and death. Having a system in place to prevent an overpressure situation is critical and one way to accomplish this is with a High Integrity Pressure Protection System (HIPPS). 
Published: July 13, 2015

E-HELP: Monitoring and Alarming on Critical HART Data with the HIM

E-HELP: Monitoring and Alarming on Critical HART Data with the HIM
Q: Is the SPA2 Limit Alarm Trip compatible with HART and can you pass HART through the unit? Our application is a control valve with a loss of signal cutout. We are using the SPA2 for this with position feedback via a Tri-Loop.

A: The SPA2 HLPRG model can be added to an existing HART loop without disrupting the existing HART communications on the loop. However, the optional analog output of the SPA2 will not contain any of the HART digital components so it won’t be useful for connecting to the Tri-Loop.

Published: June 15, 2015

E-HELP: Setting Multiple Trip Setpoints with the ECA

E-HELP: Setting Multiple Trip Setpoints with the ECA

Q: I am interested in an ECA alarm unit, model #: ECA/4-20MA/DH1H1/24DC/DIN. I have three questions:

1. I have a need for three different trip setpoints based on the same transmitter input. How can I accomplish this with the ECAs? Can I use two ECAs using the second ECA with a 1-5VDC input or can the 4-20mA signal be run in series through both ECA inputs?

2. Do I need to specify the -RF option to get the RFI protection? And is the testing for both radiated and conducted susceptibility (RS103, CS114, CS115)? Is it possible to see the test report for the EMI/RFI testing?

3. Is DIN-rail the only mounting option?

Published: June 9, 2015
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