Plant battery and AGC voltage fluctuations are two examples of voltage sources that may be monitored by the analog card. In addition to the threshold alarms generated, the analog card provides real-time absolute voltage measurements, both to the alarm master and at the front panel display.
Many temperature, pressure and other transducers use a current loop principle. Current flow in the loop changes as the measured value changes. The analog card reads these current changes as a voltage across a 250 ohm shunt resistor on the input. The front panel display shows voltage, but the T/MonXM master or the T/KDA screen can show values in native units.
Analog Scaling and Offset
The Analog Card can make a measured input voltage smaller or larger (called scaling), shift its value range (called offset) and assign a units suffix (volts, degrees, PSI, etc.).
|Conversion Bits:||12 bit ADC's|
|Input Voltage Scales:||-79.9 VDC to +79.9 VDC|
|Voltage Resolution:|| |
|Power Input:|| |
|Analog Accuracy:||+/- 1.5%|
|Operating Range:||0 to +60 Degrees Celsius. |
Option X5 -30 to +70 Degrees C
|Humidity:||0% to 95% non-condensing|
|Network Interface Adapter||D-PC-770-10A-0V|
|"V" Option Numbers||Power Supply Voltage (V): |
0 = Wide Range (-18 to -72 VDC),
2 = -24 VDC,
4 = -48 VDC,
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