Rockwell Automation 5000,D50006.2.10 PI INSTALLATION MANUAL - Manual (Page 104)

Chapter 7
Installing 1771 I/O
7-16
Test Connections
Determine that each I/O line is correctly connected between its I/O
terminal and its input or output device. Test for continuity. A simple
continuity test may be accomplished by temporarily jumping an I/O
terminal to ground; then checking for very low resistance to ground at the
other end of the I/O wire where it connects to its input or output device.
This test does not check for I/O components being shorted together or to
ground. Provide wire-number labels at all wire connections, including
those at any optional user-supplied terminal strips. Use the logical I/O
addresses (link/chassis/module-slot/terminal) as wire numbers.
Connect Power Lines
ATTENTION: Do not turn on power to any input or output
circuit at this time. To avoid exposing personnel to electric
shock hazards, all input and output devices must remain
de-energized until power is required during the
check-out procedure.
Connect the various user-supplied power and “common” (ground) wires.
Distribute these wires among the wiring arms in such a way that no single
wire exceeds its rated current.
ATTENTION: Calculate the maximum possible current in each
power and common wire. Do not exceed the rated current for
any particular wire size permitted by the local electrical code.
Overheated wires and damaged insulation may result from
over-loading.
Tie Wrap
Use tie wraps to gather the wires at each wiring arm. Neatly bundle wires
in a way that will allow the arms to pivot from vertical to horizontal.