Limit alarm trips watch process variables
A
Moore Industries International product story
Edited by the Engineeringtalk editorial team
Feb 25, 2005
Programmable limit alarm trips provide on/off control, warn of trouble and facilitate emergency shutdown when a monitored process signal falls outside of a user-selectable high or low limit.
Moore Industries' SPA2 programmable current/voltage and RTD/thermocouple limit alarm trips provide on/off control, warn of trouble and provide for emergency shutdown by sending up to four relay outputs when a monitored process signal falls outside of a user-selectable high and/or low limit.
Available SPA2 models accept input signals from transmitters, temperature sensors, resistance and potentiometer devices, and direct millivolt sources.
They provide two or four independent and individually configurable alarm relay outputs.
Using onboard controls or the company's free PC configuration software, each individual alarm trip relay may be programmed as a high or low limit process alarm, rate-of-change alarm, input fault alarm or self-diagnostic alarm.
The SPA2 features: industry-best 20bit input resolution; long-term stability (5 years); and a metal RFI-resistant DIN-mount housing.
A large, 5-digit process and status readout shows the process variable, the output or toggles between the two in selectable engineering units.
When an alarm trip and transmitter are needed at the same location, the SPA2 can provide a single solution and reduce costs and installation time.
The SPA2 provides a proportional and isolated analogue retransmission of the input signal that can be sent to remote monitoring and control devices like a DCS, PLC, PC, indicator or data recorder.
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