Table of Contents
6. Check the gate to cathode junction of each SCR. With a digital
multimeter set to Ohms, measure the resistance of each SCR junction.
For regenerative drives, refer to
regenerative drives, refer to
If a measurement is outside of the range that is specified in these tables
or if one reading deviates significantly from the majority, then module
replacement can be necessary. See SCR Module Replacement on
page 96.
Table 4 - SCR Gate to Cathode Junction Measurements for Regenerative Drives
On SCR Module
(1) The actual reading varies depending upon the SCR manufacturer. Verify that the actual measured value is consistent for all SCRs.
Figure 8 - SCR Connection Pinouts for Regenerative Drives
SCR Module 01
6 7
Gate Lead
5 4
7 6
Pinouts
SCR Module 1
Rockwell Automation Publication 20P-TG001C-EN-P - February 2018
Table 5
SCR
Measure from
1
1
Pin 5
4
Pin 6
2
2
Pin 5
5
Pin 6
3
3
Pin 5
6
Pin 6
01
01
Pin 6
04
Pin 5
02
02
Pin 6
05
Pin 5
03
03
Pin 6
06
Pin 5
SCR Module 02
4 5
6 7
5 4
7 6
SCR Module 2
Component Test Procedures
Table 4
and
Figure
8. For non-
on page
32
and
Figure 9
To
Nominal Meter Reading
Pin 4
5...20 Ω
Pin 7
Pin 4
Pin 7
Pin 4
Pin 7
Pin 7
Pin 4
Pin 7
Pin 4
Pin 7
Pin 4
SCR Module 03
4 5
6 7
4 5
5 4
7 6
SCR Module 3
Chapter 2
on page 32.
(1)
Gate Lead
Pinouts
31
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