Rockwell Automation 2711P PanelView Plus Terminal User Manual - Manual (Page 52)

52 Publication 2711P-UM001J-EN-P - November 2009
Chapter 3 Power Connections
External Power Supply For Non-insolated DC Terminals
Use a single, 24V DC power supply to power each PanelView Plus
device, such as cat. no. 2711P-RSACDIN. Using a separate, isolated
and ungrounded source to power each terminal prevents ground loop
currents from damaging the terminals.
The output on the power supply must be isolated from the input and
not connected to earth/ground.
The non-isolated power supply does not provide galvanic isolation. A
Class 2 or Safety Extra-Low Voltage (SELV) isolated power supply with
a 24V DC nominal output voltage is required to power the terminal.
Multiple AC Power Supplies to Power Multiple DC Terminals
TIP
To identify non-isolated DC logic modules refer to the Logic
Modules (700 to 1500 only) table on page 24 .
TIP
All 400 and 600 DC terminals contain non-isolated DC power
supplies.
ATTENTION
Use a Class 2 or SELV supply as required by local wiring
codes for your installation. The Class 2 and SELV power
sources provide protection so that under normal and
single-fault conditions, the voltage between the conductors,
and between the conductors and functional earth or
protective earth does not exceed a safe value.
Circuitry Circuitry
dc+
PanelView Plus PanelView Plus
AC/DC Power Supply
L1 L2
dc- dc+ dc-
L1 L2
(2711P-RSACDIN) (2711P-RSACDIN)
AC/DC Power Supply