18 GE INFORMATION D20E ETHERNET I/O MODULE INSTRUCTION MANUAL
CHAPTER 1: BEFORE YOU START
• Before performing visual inspections, tests, or maintenance on this equipment, isolate
or disconnect all hazardous live circuits and sources of electric power. Assume that all
circuits are live until they have been completely de-energized, tested, and tagged. Pay
particular attention to the design of the power system. Consider all sources of power,
including the possibility of back feed.
• Turn off all power supplying the equipment in which the D20E is to be installed before
installing and wiring the D20E.
• Operate only from the power source specified on the installed power supply module.
• Beware of potential hazards and wear personal protective equipment.
• The successful operation of this equipment depends upon proper handling,
installation, and operation. Neglecting fundamental installation requirements may
lead to personal injury as well as damage to electrical equipment or other property.
• Hazardous voltages can cause shock, burns or death. To prevent exposure to
hazardous voltages, disconnect and lock out all power sources before servicing and
removing components.
• If the D20E is used in a manner not specified in this manual, the protection provided
by the equipment may be impaired.
• Changes or modifications made to the unit not authorized by GE Grid Solutions could
void the warranty.
Protective earth ground
The D20E must be attached with a 4 mm
2
(#12 AWG) wire and a secure ring lug earth
ground connected to the safety and protective earth #10 screw and lock washer stud
located at bottom right of module (see
Figure 15).
Terminal blocks TB1 and TB2
For stranded wire connections to terminal blocks TB1 and TB2 use crimp ferrules.
Wiring to terminal blocks TB1 and TB2 must not have exposed accessible conductors.
Wire and cable must have at least a +80 °C temperature rating.
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