
22
Rockwell Automation Publication 23PFC-TG001A-EN-P - March 2018
Chapter 2
Component Test Procedures
Power Component Test
Procedures
Follow the applicable procedure for the affected power components.
Check the SCR Modules
The PowerFlex DC field controller power bridge consists of six SCR modules
that are mounted on the main heat sink. One of these conditions can indicate a
malfunction of a SCR module:
• An Overcurrent fault (F13)
• Blown or tripped incoming protection devices
• Erratic field operation.
The following procedure can be used if a power bridge component
malfunction is suspected.
1. Read the General Safety Precautions on page
2. Remove the protective covers from the device.
• For frame A devices, see page
• For frame B devices, see page
3. Verify that contactor power (if used) is removed.
4. Check the anode to cathode junction of each SCR. With a digital
multimeter set to Ohms, measure the resistance across the SCRs (lead
orientation is not critical).
• For frame A devices, see
on page
.
• For frame B devices, see
5. If a low resistance is detected, determine which SCR modules are
on page
and replace that module.
• For frame A devices, see SCR Module Replacement on page
.
• For frame B devices, see SCR Modules Replacement on page
.
Table 3 - SCR Anode to Cathode Junction Measurements
On SCR Module
SCR
Measure from
Terminal
To Terminal
Nominal meter Reading
1
1
U
C
“open circuit” or “megaOhms” range
4
U
D
2
2
V
C
5
V
D
3
3
W
C
6
W
D
01
01
U
C
04
U
D
02
02
V
C
05
V
D
03
03
W
C
06
W
D
Содержание 23PFC
Страница 8: ...8 Rockwell Automation Publication 23PFC TG001A EN P March 2018 Preface Notes ...
Страница 130: ...130 Rockwell Automation Publication 23PFC TG001A EN P March 2018 Appendix A Schematics Notes ...
Страница 142: ...142 Rockwell Automation Publication 23PFC TG001A EN P March 2018 Appendix B Circuit Board Layouts and Connections Notes ...
Страница 148: ...148 Rockwell Automation Publication 23PFC TG001A EN P March 2018 Index Notes ...
Страница 149: ......