National Instruments NI 9871, RS422, RS485 Isolation Voltages, Hazardous Locations

NI 9871 Operating Instructions 16 ni.com
Isolation Voltages
Port-to-earth ground
Withstand....................................1000 Vrms, veri fied by a
dielectric withstand test, 5s
Continuous.......... .......................60 VDC,
Measurement Category I
Hazardous Locations
U.S. (UL)................................ ..........Class I, Division 2,
GroupsA, B, C, D, T4;
Class I, Zone 2,
AEx nA II T4
Canada (C-UL)......................... ........Class I, Division 2,
GroupsA, B, C, D, T4;
Class I, Zone 2,
Ex nA II T4
Europe (DEMKO).............................Ex nA IIC T4