Protects Equipment and Prevents Ground Loops       with 1800V Isolation

High Density DIN Rail Mounting

Easy Field Configurable Input Ranges: 20mV to       100V (unipolar/bipolar), 2mA to 100mA

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

Flexible Power Supply Accepts 9 to 30VDC

The ActionI/Q model Q408 is an DC powered, DIN rail mount, DC input signal conditioner, with 1800V isolation between input, output and power. The field configurable input and output feature offers flexible, wide ranging capability for DC current and voltage signals.

Advanced technology has added two significant improvements to this new DC to DC signal isolator.

First, advances in surface mount design and switching power supply technology allow multi-channel density. The Q408 is available as a single channel signal conditioner (1 input / 1 output) or a multi channel signal conditioner (2 inputs / 2 outputs). All models maintain the high 1800V isolation level from channel to channel, as well as input to output to power.

Second, 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 Q408 can be set via DIP switches for any one of 12 voltage ranges from 10mV to 100V or 6 current ranges from 1mA to 100mA (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.

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 18 switch selectable input ranges.

For example, the DIP switch configured 0- 20mA input range could be calibrated via push button for 0-8mA (i.e. 60% span reduction) or offset to a range of 12-20mA (i.e. 60% offset and 60% span reduction). If the output was configured for 0-10V, then 12-20mA input would correspond to the 0-10V full scale output. Thus, input ranges such as 18- 20mA or 0-2mA are possible using the 0- 20mA range.

Application
The ActionI/Q Q408 field configurable isolator is useful in eliminating ground loops, converting signal levels, and providing signal drive. The field configurable, wide ranging capabilities ensure maximum flexibility for most DC to DC applications, minimizing spare parts requirements.

Touchcal Technology
The Q408 utilizes Action Instruments’ TouchCAL technology which greatly simplifies calibration. Once the unit is configured via DIP switches for voltage or current, the pushbutton is used to precisely calibrate the minimum and maximum levels.

To set the input level within the DIP switch configured range, the user simply applies the high input signal (voltage or current) and pushes the CAL button. The low input signal is then applied and pushing the CAL button again stores the low input signal.

The high and low input levels are stored in nonvolatile memory and correspond to the high and low output levels. These output levels are precisely adjusted using the input signal.