Rockwell Automation Publication 2711P-TD001D-EN-P - February 2011
18
Wiring and Grounding Guidelines for PanelView Plus Terminals
Protective Earth Connection for AC Terminals
PanelView Plus terminals with an AC power input have a protective
earth/ground terminal that you must connect to a low-impedance earth/ground.
The protective earth/ground connection is on the power input terminal block.
The protective earth terminal requires a minimum wire gauge.
The protective earth/ground terminal is typically connected to a system
grounding bus. If the grounding bus has tapped holes, the conductor from the
functional earth terminal must have a ground lug on the ground bus end. A bolt
should pass through a star washer, then through the ground conductor lug, then
into the ground bus.
Use the shortest, practical wire length to connect the protective earth/ground to
a low-impedance earth/ground. The ground wire must be either green or green
with a yellow stripe.
Refer to local wiring codes and regulations for grounding requirements.
Figure 8 - Protective Earth Connection for 400 and 600 AC Terminals
IMPORTANT
The protective earth connection is required for both electrical safety and
Electromagnetic Compliance (EMC) with the European Union (EU) EMC
directive for CE-mark conformance.
Table 11 - Protective Earth Wiring on AC Terminals
Terminal
PE Symbol
Wire Type
Wire Gauge
Terminal Screw Torque
400 and 600
Copper
Stranded or solid
Cu 90 °C (194 °F)
2.1…3.3 mm
2
14…12 AWG
0.45…0.56 N•m (4…5 lb•in)
700 to 1500
(1)
2.1…3.3 mm
2
14…12 AWG
0.56 N•m (5 lb•in)
(1) Includes PanelView Plus 6 terminals and PanelView Plus terminals supporting FactoryTalk View ME software, version 5.1 or earlier.
Tapped Hole
Ground Lug
Bolt
Star Washer
Enclosure Wall
Ground Bus
To Grounding Electrode System
L1
L2/Neutral
Protective Earth
to Ground Bus