Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual - Manual (Page 49)

Installing Your
Programmable Controller
Chapter 4
4-10
Figure 4.3
Power Supplies and Input Circuits Receiving Power through a
Separate Transformer
L1
L2
L3
1FU
2FU
3FU
H
L1
L2
L3
H
1 4
H
3
H
2
X
1
X
2
H H
1 4
H
3
H
2
X
1 X
2
10302-I
to motor starters
stepĆdown
transformer
incoming ac
disc
to power supplies
and input circuits
isolation/constantĆvoltage
transformer
to output circuits
Ground Connection
When bringing ac power into the enclosure, do not connect its raceway
through an equipment-grounding conductor to the ground bus on the
back-panel. The raceway should be grounded elsewhere. Connecting the
raceway to the ground bus would cause a ground loop.