Allen-Bradley PanelView Plus 1000 Technical Data

Rockwell Automation Publication 2711P-TD001D-EN-P - February 2011
Wiring and Grounding Guidelines for PanelView Plus Terminals 29
High Current from Multiple Ground Connections
The illustration below shows one 24V DC power supply providing power to a
DC motor and a nonisolated PanelView Plus terminal. Because DC- is
connected to earth/ground in the motor and the PanelView Plus terminal, two
paths exist for the current to return to the power supply. The motor current can
flow through the system’s earth/ground structure into the PanelView Plus
terminal, and back to the power supply.
Because the system’s earth/ground structure has a lower impedance than the
common wiring, the motor current will flow through earth/ground and the
PanelView Plus terminal. The motor current could damage the terminal.
Nonisolated DC PanelView Plus Terminals
Use a separate power supply for each device; one to power the nonisolated
PanelView Plus terminal and one to power the motor. The current will return to
each power supply through the DC- wiring instead of the earth/ground
structure.
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Separate Power Supply for Each Device
Single Power Supply Provides Power to Multiple Devices
DC Power Supply
+24V DC
Power
Common
Circuitry
DC+ DC-
DC Motor
Motor Common
tied to Earth
DC Motor
Motor Common
Tied to Earth
PanelView Plus
Terminal
Circuitry
2711P-RSACDIN
+24V DC
Power
Common
DC Power Supply
+24V DC
Power
Common
DC+ DC-
PanelView Plus
Terminal

Allen-Bradley PanelView Plus 1000 Specifications

General

Brand	Allen-Bradley
Model	PanelView Plus 1000
Category	Touch terminals
Language	English