D20E ETHERNET I/O MODULE INSTRUCTION MANUAL GE INFORMATION 83
D20E Ethernet I/O Module
Chapter 6: Preliminary Power Up and
Test
Prelimin ary Power Up and Test
This chapter describes:
• Safety and protective earth grounding on page 83
• Power source connection on page 84
• Power supply requirements on page 85
• Preliminary power-up and test procedure on page 85
Safety and protective earth grounding
Surge and noise suppression components used on the D20E module conduct during
transients to prevent mal-operation or damage to internal devices. To ensure shunting of
transients from points to ground and to ensure that the D20E module has a bonded safety
earth ground, the D20E module's earth ground point must be connected to a low
impedance ground using a braided cable or a solid copper conductor (minimum
4 mm
2
(#12
AWG) wire is recommended). The connection must be made to the #10 safety/
protective earth screw and lock washer stud located on the lower-right-side of a D20E
module (see
Figure 15) with a ring lug. When making ground connections, ensure that all
surfaces that are used for grounding are free of dirt, residue and corrosion.
Figure 15: D20E protective earth ground
Safetyandprotective
earth ground screw
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