The ActionI/Q model Q478 is a DIN rail mount, frequency input signal conditioner with 1800VDC isolation between input, output and power. The field configurable input and output offers flexible, wide ranging capability for variable frequency drives, magnetic pickups, turbine flowmeters, and other pulse or frequency output transducers.
The input of the Q478 can be configured for any frequency span from 2Hz to 10,000Hz. The input amplitude threshold sensitivity can be adjusted from 150mVp to 10Vp to ensure accurate frequency measurement and minimize transient noise related errors. The maximum input amplitude is 150 Vrms. The output can be set for either 0-5V, 0-10V, 0-1mA, 0-20mA or 4-20mA.
Advanced digital technology allows the Q478 to be field configured for virtually any frequency input to DC signal output within the ranges specified. Calibration utilizes TouchCALTM technology where the user simply applies the minimum and maximum input frequencies, touching a recessed button to configure the corresponding minimum and maximum output range.
Another feature of the Q478 is a 8VDC excitation source common to the input. This can be used as a signal source for relay contacts or as an excitation source for open collector type proximity sensors. The Q478 is DC powered and will accept any power between 9 and 30VDC.
The Q478 utilizes Action Instruments’ TouchCAL technology which greatly simplifies configuration. To set the input frequency range, the user pushes the CAL button to enter the calibration mode. The high input frequency is applied first, while the INPUT LED is lit, and the CAL button is pushed to store the value. The low input frequency is then applied and pushing the CAL button again stores the low frequency input.
The high and low input ranges are stored in non-volatile memory and correspond to the high and low output range which is selected via DIP switches.
To precisely adjust the output, the user adjusts the input frequency while the OUT LED is lit until the desired output level is achieved. The output levels are locked-in by pushing the CAL button. Diagnostic LEDs show the operation mode of the device.