Safety Voltages; Screw Terminal Connectors; Accessory Products - Measurement Computing USB-2404-60 User Manual

USB-2404-60 User's Guide

Safety voltages

Parameter
Channel-to-earth ground isolation
Channel-to-channel isolation
Connect only voltages that are within the limits specified in this table.
Note 3:
Measurement Category II is for measurements performed on circuits directly connected to the
Note 4:
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

Connector type
Screw terminal wiring
Torque for screw terminals

Accessory products

ACC-102
ACC-160
Table 7. Safety specifications (Note 3)
Conditions
Continuous
Withstand
Continuous
Withstand
Table 8. Screw terminal connector specifications
Screw terminal
16 to 28 AWG copper conductor wire with 7 mm (0.28 in.) of insulation stripped
from the end.
0.22 to 0.25 N· m (1.95 to 2.21 lb. · in.)
Table 9. Screw terminal assignments
Screw terminal
0
1
0
1
0
1
0
1
Table 10. Screw terminal connector specifications
Two-position detachable screw terminal connector blocks (quantity ten)
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)
Specification
250 Vrms, Measurement Category II (Note 4)
2,300 Vrms, verified by a 5 sec dielectric withstand test
250 Vrms, Measurement Category II (Note 4)
1390 Vrms, verified by a 5 sec dielectric withstand test
Signal
CH0+ (CH0 IN HI)
CH0– (CH0 IN LO)
CH1+ (CH1 IN HI)
CH1– (CH1 IN LO)
CH2+ (CH2 IN HI)
CH2– (CH2 IN LO)
CH3+ (CH3 IN HI)
CH3– (CH3 IN LO)
16
Specifications