Application
The ActionI/Q Q406 field configurable isolator is useful in eliminating ground loops, converting signal levels, and providing signal drive. The field configurable, wide ranging capabilities ensures maximum flexibility for most DC to DC applications, minimizing spare parts requirements.

TouchcalTechnology
The Q406 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 input and output levels are stored in nonvolatile memory.

Diagnostic LEDs
The Q406 has three diagnostic LEDs. One green LED, labeled RUN, is used for diagnostics to indicate that power is on, and it will flash quickly if the input signal is above the calibrated range or slowly if the input signal is below range. The RUN LED is continuously on when the unit is functioning within the calibrated range.

The yellow IN LED is on while calibrating the input and the red OUT LED is on while calibrating the output.

Configuration
A major advantage of the Q406 is its wide ranging capabilities and ease of configuration. The Q406 can be configured for input ranges from 10mV to 100V or 1mA to 100mA, with >90% input offset or will adjust down to <10% of full scale input span (except on 20mV/2mA range where maximum offset or gain adjustment is 50%). Unless a specific custom calibration is specified, the factory presets the Model Q406 as follows:

Regarding other I/O ranges, refer to the applicable table below. For quick and easy calibration mode reference, see the step-by-step flow chart in Figure 2.

1. With power off, snap off the face plate by lifting the right edge, away from the heat sink. Then, slide the heat sink forward and off the module.
2. The single channel module has two eight position switch blocks, one for input and one for output. The dual output modules have a second board behind the heat sink. Gently lift this board away from the main board, rocking it back while lifting. The one input, two output module has one ten position switch block for input and channel 1 output, along with a two position switch for the second output. The two input, two output module has two ten position switch blocks, one for each channel.
3. For single channel modules, choose the desired input, function and output range from Table 1, 2, and 3. For multi-channel modules, use Table 4. Set the dip switches for the desired I/O.

Calibration
For best results, calibration should be performed in the operating installation, allowing at least one hour for thermal stability of the system. If precalibration on a test bench is preferred, then an output load equal to the input impedance of the device(s) connected to the Q406 output is recommended, along with a 1 hour warm up period.

1. 1. Install the module on to a piece of DIN rail and the I/Q Rail mounting combination. See the I/Q Rail Data sheet for details.2. Connect the input to a calibrated DC source and the output to a voltage or current meter. Apply power and allow the system to reach thermal equilibrium (approx.1 hour ).
2. Note: An I/QRail is required to deliver power to the modules. See ordering information.
3. Adjust the input signal to the desired maximum and observe that the green LED is on or flashing. Push the CAL button and hold it down for more than 5 seconds, until the yellow and Green LEDs are flashing.
4. When the yellow and green LEDs stop flashing, the yellow and red LEDs should be on. Push the CAL button momentarily, the yellow and green LEDs should now be on.
5. Apply the exact maximum input signal level desired, if not already applied, then push the CAL button to store. The yellow LED should now be on.
6. Apply the exact minimum input signal level desired, then push the CAL button to store. The green and red LED should now be on.
7. Adjust the input signal up, until the output is precisely at the desired maximum level (e.g. 20.00mA), then push the CAL button to store. The red LED should be on.
8. Adjust the input signal level down, until the output is precisely at the desired minimum level (e.g. 4.00mA), then push the CAL button to store. The yellow, green and red LEDs should now be on.
9. To store the calibration, push the CAL button one final time. The green LED should be on if the input is within the calibrated range.