National Instruments 8-Channel Solid-State Relay (SSR) Digital Output NI 9485 - Manual (Page 3)

© National Instruments Corp. 3 NI 9485 Operating Instructions
Safety Guidelines for Hazardous Voltages
If hazardous voltages are connected to the module, take the
following precautions. A hazardous voltage is a voltage greater
than 42.4 V
pk
or 60 VDC to earth ground.
Caution Ensure that hazardous voltage wiring is
performed only by qualified personnel adhering to local
electrical standards.
Caution Do not mix hazardous voltage circuits and
human-accessible circuits on the same module.
Caution When module terminals are hazardous voltage
LIVE (>42.4V
pk
/60 VDC), you must ensure that devices
and circuits connected to the module are properly
insulated from human contact. You must use the NI 9939
connector backshell kit to ensure that the terminals are
not accessible.