How to Set Input Range When I Use an SCXI 1120 with a TBX 1327 Terminal BlockPrimary Software: Utility Software>>Measurement & Automation ExplorerPrimary Software Version: 1.0.1 Primary Software Fixed Version: N/A Secondary Software: N/A Hardware: SCXI>>Modules>>SCXI-1120, SCXI>>Terminal Blocks>>SCXI-1327
Problem: I have an SCXI 1120 module, and I want to acquire signal whose range is greater than 5 V. That's why I'm using a terminal block (a TBX 1327), but I don't know how to configure gain and attenuation. Solution: On SCXI 1120 modules you first have to configure the input range by setting the jumpers inside the module, channel by channel. For more information on how to set these jumpers please see the manual in the related links section below. For example, if you set the first stage and the second stage jumpers of channel 0 to a gain of 50, the maximum input range for this channel will be +/- 0.1 V ( +/- 5 V / 50). The TBX-1327 allows you to attenuate your signal to further increase the input range. If you don't attenuate your signal, the input range will stay at +/- 0.1 V. So, with the TBX-1327 set at 100 times attenuation, the maximum input range for channel 0 will be +/- 10V (+/- 0.1 V * 100). The final formula to calculate your input range is :+/- [ ( 5 V / jumpers gain ) * attenuation ]. All of the settings of gain and attenuation need to be configured in Measurement and Automation Explorer for your device to work properly. When you configure your SCXI modules under MAX, you have to set the SCXI 1120 gain for channel 0 to 50. A picture of this is shown below.  In addition to gain, you also have to set TBX 1327 attenuation to the desired value. A picture of this is shown below.  Related Links: Product Manual: SCXI-1120/D User Manual and Specifications Attachments:
Report Date: 06/12/2008 Last Updated: 08/08/2008 Document ID: 4MB7RJQ2 |
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