© National Instruments Corporation 13 USB-9201/9221 User Guide and Specifications
Physical CharacteristicsIf you need to clean the module, wipe it with a dry towel.
Dimensions
With combicon................................14.0 cm × 8.8 cm × 2.5 cm
........................................................(5.52 in. × 3.47 in. × 1.00 in.)
25-pin DSUB.................................. 12.6 cm × 8.8 cm × 2.5 cm
........................................................(4.95 in. × 3.47 in. × 1.00 in.)
Screw-terminal wiring............................12 to 24 AWG copper conductor
wire with 10 mm (0.39 in.) of
insulation stripped from the end
Torque for screw terminals.................... 0.5 – 0.6 N · m (4.4 – 5.3 lb · in.)
Weight
USB-9201/9221 with combicon..... Approx. 250 g (8.8 oz)
USB-9201/9221 with DSUB ..........Approx. 245 g (8.6 oz)
SafetyMaximum VoltageConnect only voltages that are within these limits.
AI to COM............................................. ±60 VDC
Isolation Voltages for USB-9201/9221 with Screw Term ina lsChannel-to-channel isolation................. None
Channel-to-earth ground isolation
Continuous......................................250 Vrms, Measurement
Category II
Withstand........................................2,300 Vrms, verified by a
dielectric withstand test
Measurement Category II is for measurements performed on circuits
directly connected to the electrical distribution system. This category refers
to local-level electrical distribution, such as that provided by a standard
wall outlet (for example, 115 V for U.S. or 230 V for Europe). Do not use
this module with Measurement Category III or IV voltages.