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Absolute Differential Alarm - ADA174
The ADA174 determines the difference in magnitude of two inputs. The alarm relay will operate based on the difference in the two signals.
The ADA174 will accept all common process inputs plus a large range of sensors and ac measurements using input-conditioning cards.
The RMS responding current measurement when used with HALL CT input provides total isolation and true waveform transfer.
Each input can be configured to measure different process variables that must be kept within a specific range of each other.
The trip-point and dead-band are adjusted using front mounted 15-turn trim potentiometers.
Inputs
ac Current
ac Voltage
dc Current/Voltage
Potentiometer
Resistance
RTD
Signal Powered
Speed/Frequency
Temperature
Thermocouple
Function
Alarm
Output
Relay