Q468 |
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 Benefits
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The field configurable ActionI/Q Q468 is a DIN rail mount, AC input signal conditioner with 1800VDC isolation between input, output and power. The field configurable input and output offers flexible, wide ranging capability for scaling, converting or buffering AC inputs ranging from 5mA to 100mAAC or 50mV to 300VAC. For current inputs above 100mAAC, it is recommended that an input shunt resistor be used and the Q468 be configured for the proper input range. For example, a 5AAC current transformer output can use the Action model C006 shunt resistor (0.1W, 5W) and set the input of the Q468 for 0-500mVAC. The DC output of the Q468 is proportional to the average of the fullyrectified AC input signal, and is calibrated for sine waves between 40-400Hz. Low-cost microprocessor technology has enabled replacement of zero and span adjustment potentiometers with push-button, “TouchCALTM” technology. In essence, the thermal drift and mechanical variability of the potentiometers have been removed and replaced with a digitally stable circuit. TouchCAL technology enables precise calibration and provides more than 90% offset of the zero value and adjustment down to 10% of the full scale input span for most of the 16 switch selectable input ranges. For example, the dipswitch configured 0-200V input range could be calibrated via push button for 0-80V (i.e. 60% span reduction) or offset to a range of 120-200V (i.e. 60% offset and 60% span reduction). If the output was configured for 0-10V, then 120- 200V input would correspond to the 0-10V full scale output. Thus, input ranges such as 180-200V or 0-20V are possible using the 0- 200V range. Additionally, the inherent zero and span interactivity of potentiometer based analog amplifier circuitry is removed, providing 100% non-interactive adjustment Additionally, the inherent zero and span interactivity of potentiometer based analog amplifier circuitry is removed, providing 100% non-interactive adjustment |
