OM-USB-2404-60 User's Guide
Specifications
14
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)
