Measurement Computing USB-2404-10 - Manual (Page 17)

USB-2404-10 User's Guide Specifications
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Safety voltages
Table 7. Safety specifications (Note 3)
Parameter Conditions Specification
Channel-to-earth ground isolation Continuous 250 Vrms, Measurement Category II (Note 4)
Withstand 2,300 Vrms, verified by a 5 sec dielectric withstand test
Channel-to-channel isolation Continuous 250 Vrms, Measurement Category II (Note 4)
Withstand 1390 Vrms, verified by a 5 sec dielectric withstand test
Note 3: Connect only voltages that are within the limits specified in this table.
Note 4: 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 US or 230 V for Europe.
Caution! Do not connect the device to signals or use for measurements within Measurement Categories
III or IV.
Screw terminal connectors
Table 8. Screw terminal connector specifications
Connector type Screw terminal
Screw terminal wiring 16 to 28 AWG copper conductor wire with 7 mm (0.28 in.) of insulation stripped
from the end.
Torque for screw terminals 0.22 to 0.25 N· m (1.95 to 2.21 lb. · in.)
Table 9. Screw terminal assignments
Screw terminal Signal
0 CH0+ (CH0 IN HI)
1 CH0 – (CH0 IN LO)
0 CH1+ (CH1 IN HI)
1 CH1 – (CH1 IN LO)
0 CH2+ (CH2 IN HI)
1 CH2 – (CH2 IN LO)
0 CH3+ (CH3 IN HI)
1 CH3 – (CH3 IN LO)
Accessory products
Table 10. Screw terminal connector specifications
ACC-102 Two-position detachable screw terminal connector blocks (quantity ten)
ACC-160 Backshell for use with the ACC-102 two-position screw terminal connector blocks. Provides
strain relief and operator protection from high-voltage signals (quantity four)