Rockwell Automation 6181 Installation Instructions - Manual (Page 22)

22 6181 Industrial Computer
Publication 6181-IN002C-MU-P
DC Power Connections
A standard three position terminal block is provided for connecting power.
Use 12 or 14 AWG stranded wire to connect these terminals to a stable
source of 24 V DC power with 10 A minimum rating available. Observe
proper polarity and keep the wiring as short as possible (recommend less
than 3 meters). Ensure that the wires are connected correctly using
standard wiring practices.
ATTENTION: The ground connection must be made to
an adequate earth ground using as short a wire as possible
to eliminate the possibility of radio frequency noise and
interference.