Adjustable Bridge Excitation 1 to 10V with up to       120mA drive

Five Field Configurable Output Ranges: 0-5V, 0-       10V, 0-1mA, 0-20-mA and 4-20mA

ASIC Technology for High Reliability

Flexible Power Supply Accepts 18 to 30VDC

Eleven Field Configurable Input Ranges from       10mV to ±200mV (0.5mV/V to >50mV/V)

The ActionI/Q Q448 is a DIN rail mount, bridge or strain-gage input signal conditioner with 1800VDC isolation between input, output and power. The field configurable input and output offers flexible, wide ranging capability for bridge or strain-gage input applications from 0.5mV/V to over 50mV/V.

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. Additionally, the inherent zero and span interactivity of potentiometer based analog amplifier circuitry is removed, providing 100% non-interactive adjustment.

The field configurable input of the Q448 can be set via DIP switches for any one of 11 voltage ranges from 10mV to ±200mV (see Table 1). The field configurable out- put is linear to the input and can be set for either 0-5V, 0-10V, 0-1mA or 4-20mA, direct or reverse acting.

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 11 switch selectable input ranges. For example, the DIP switch configured 0-100mV input range could be calibrated via push button for 0-40mV (i.e. 60% span reduction) or offset to a range of 60-100mV (i.e. 60% offset and 60% span reduction). If the output was configured for 0-10V, then 60- 100mV input would correspond to the 0-10V full scale output. Thus, an input range such as 90-100mV is possible using the 0-100mV range.

Advanced digital technology combined with Action’s exclusive ASIC technology allows the Q448 to be field configured for virtually any Bridge input to DC output within the limits specified. Calibration utilizes “TouchCAL” technology where the user simply configures the desired input excitation and millivolt range via switches, then applies the minimum and maximum input signals, touching a recessed button to store range values.

The Q448 will accept power between 18 and 30VDC; typically a 24VDC source is used.