Allen-Bradley 23PFC, Руководство по обслуживанию оборудования, Страница: 24 / 150

24 Rockwell Automation Publication 23PFC-TG001A-EN-P - March 2018
Chapter 2 Component Test Procedures
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 frame A devices, see
Table 4 and Figure 5 .
• For frame B devices, see Table 4 and Figure 6 on page 25 .
7. If a measurement is outside of the range that is specified in Table 4 or if
one reading deviates significantly from the majority, consider replacing
the SCR modules.
• For frame A devices, see SCR Module Replacement on page
67 .
• For frame B devices, see SCR Modules Replacement on page 103 .
Figure 5 - Frame A SCR Module Gate-Lead Connection Pinouts
Table 4 - SCR Gate to Cathode Junction Measurements
On SCR Module SCR Measure from To Nominal meter reading
1 1 Pin 5 Pin 4 5…20 Ω
(1)
(1) The actual reading varies depending upon the SCR manufacturer. Verify that the actual measured value is consistent for all SCRs.
4 Pin 6 Pin 7
2 2 Pin 5 Pin 4
5 Pin 6 Pin 7
3 3 Pin 5 Pin 4
6 Pin 6 Pin 7
01 01 Pin 6 Pin 7
04 Pin 5 Pin 4
02 02 Pin 6 Pin 7
05 Pin 5 Pin 4
03 03 Pin 6 Pin 7
06 Pin 5 Pin 4
12
3
12
3
12
3
12
3
12
3
12
3
6 7 4 5
5 4 7 6
1
Gate Lead
Pinouts
Gate Lead
Pinouts
6 7 4 5 6 7 4 5
5 4 7 6 5 4 7 6
01 2 02 3 03
SCR