Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 35)

Chapter 4
Installing the DL50
4–10
Grounding is an important safety measure in electrical installations.
Grounding also helps eliminate the effects of noise due to Electromagnetic
Interference (EMI).
An authoritative source on grounding requirements is the National Electrical
Code published by the National Fire Protection Association of Boston,
Massachusetts. Article 250 of the Code describes the types and sizes of wire
conductors and safe methods of grounding electrical equipment and
components.
!
ATTENTION: To avoid risk of shock, Earth Ground must be
connected to the display at all times.
Connect power line to the DL50 terminal blocks as shown in Figure 4.7. The
DL50 will accept 95-120 or 190-240 Volts AC, 50-60 Hz input power.
Figure 4.7
Electrical Power Connections
L1 L2N
PE (Protective Earth)
Factory Installed
Ground Wire
(Green/Yellow)
L1
L2
E.GND
NO
NC
COM
Processor Board
Connect power line ground
to this terminal.
!
ATTENTION: Do not apply power to the display until all
electrical connections, including communications lines, have
been connected.
!
ATTENTION: Terminal 3 (Ground Terminal) must be connected
to a reliable low impedance earth ground to protect the display
against electrical noise. The ground will also help protect
personnel from electrical shock if a voltage is shorted to the
enclosure.
Grounding
Recommendations
Connecting Power