Measurement Computing DAQFlex - Manual (Page 41)

DAQFlex Message-based Firmware Specification Hardware Reference – USB-7202
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Hardware features
 8 analog input channels, numbered 0 to 7.
Gain ranges:
o ±10V
o ±5V
o ±2V
o ±1V
 1 digital port
All bits are individually configurable as input or output.
 External trigger input
 External pacer input/output
This feature allows multiple devices on a single USB to acquire synchronized samples. One master
device is used to drive the signal. Additional devices must be configured as slave devices using the
"AISCAN:EXTPACER=value" message. Value may be "ENABLE[/MASTER]", "ENABLE[/SLAVE]" or
"DISABLE".
 1024 bytes of nonvolatile EEPROM memory; used for storing configuration information, calibration
data, and user data.
 RATE takes a float value.
If the input scan rate requested is less than the slowest rate supported by the device, the device is
set to the slowest rate supported by the device. If the input scan rate requested is greater than the
fastest rate supported by the device, an error is generated.
 Bulk transfers
o Bulk transfers from endpoint 1 IN are used for analog input scans. Data is in RAW format and
"DEV:DATATYPE" has no impact on the data.
o The bulk transfer size must be a multiple of the USB maximum bulk packet size.