Rockwell Automation 20G2, Техническое обслуживание оборудования

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12 Rockwell Automation Publication 750-TG101A-EN-P - June 2022
Chapter 1 Before You Begin Tests, Maintenance, or Repairs
Remove Power from the
System
This procedure must be completed before attempting to service any part of a
drive.
Follow these steps to remove power from a drive.
1. Turn off and lock out all input power, including any external power
sources.
2. Wait 15 minutes.
3. Remove the appropriate cover from the drive:
• For frame 1…5 drives, see these procedures:
- Remove the Power Terminal Cover, Frames 1…5 on page 35
- Remove the IP54, NEMA/UL Type 12 Cover, Frames 2…5 on page 37
• For frame 6 drives, see these procedures:
- Remove the Cover on page 83
- Remove the Protective Guard (IP54, NEMA/UL Type 12 Enclosure)
on page 84
• For frame 7 drives, see these procedures:
- Remove the Cover on page 128
- Remove the Protective Guard (IP54, NEMA/UL Type 12 Enclosure)
on page 129
4. To verify that there is no voltage present, measure the AC input and DC
bus voltage:
• For AC input drives and bus supplies only, measure the AC input
terminals R/L1, S/L2, and T/L3, L to L and L to chassis GND (PE).
• For all products, measure the DC output terminals DC+ and DC–, DC+
to DC–, DC+ to chassis GND (PE), and DC– to chassis GND (PE).
For terminal locations and identification, see Figure 1 on page 13 ,
Figure 2 on page 14 , and Figure 3 on page 15 .
ATTENTION: Remove power before you remove or make cable connections.
When you remove or insert a cable connector with power applied, an electric arc
can occur. An electric arc can cause personal injury or property damage in theses
ways:
• An electric arc can send an erroneous signal to system field devices, which can
cause unintended machine motion
• An electric arc can cause an explosion in a hazardous environment
Electric arcs cause excessive wear to contacts on both the module and its
receiving connector. Worn contacts can create electrical resistance.