USB-1602HS 和 USB-1604HS 系列

We spec 500 VDC isolation between the USB bus and the DAQ I/O (but as soon as you connect one of the I/O to something that is not floating or isolated, then the DAQ becomes anchored. The analog common jack on the back of this DAQ family connects only to the BNC shells on its front … it does not connect to chassis/earth. This is where you would connect one low-side reference to serve both of your analog inputs (i.e. your anchor). In short, yes the unit can measure a signal riding on a 5Vdc common mode voltage, but you must be careful not to connect the BNC shells to any device that grounds its own BNC shell (i.e. at the other end of the cable) to earth. Also be careful (or don’t use) the digital I/O or counter I/O, since their ground will be anchored (indirectly) to your low-side reference potential.

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Yes, the USB-1602HS-2AO supports (2) 16 bit DACs with a per-channel update rate of 1 MS/sec. Your Windows buffer must be previously allocated and pre-loaded prior to the start of your AOutScan method.

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Based on your report, we have confirmed that ULAO02.py is currently incompatible with the USB-1602HS-2AO hardware model. We will log that as a bug here. Instead we can refer you to the following 4 analog output examples which do run OK on this hardware model: v_out.py, a_out_scan.py, ULAO01.py, and DaqOutScan01.py.

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Hello Morris - The input sensitivity for the USB-1602HS (when setup for the +-500 mV input range) is +- 0.000122 volts.

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The input impedance for the USB-1604HS series is typically 10 MΩ with the power on.

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The USB-1604HS-2AO has a 1 Mbyte FIFO that is shared with the boards I/O subsystems. The analog output FIFO can hold up to 544288 samples. The previous answer is referring to a Windows buffer that you allocate from within your software program and preload with your waveform data.

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Thank you for your inquiry. Unfortunately, the USB-1604HS-2AO is not currently supported under Linux. You may find a listing of the MCC products that have Linux support at: http://www.mccdaq.com/daq-software/Linux-Support.aspx. This list will be continuously updated as we continue to add Linux support to our data acquisition devices.

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