Allen-Bradley 23PFC, Руководство по обслуживанию оборудования, Страница: 25 / 150

Rockwell Automation Publication 23PFC-TG001A-EN-P - March 2018 25
Component Test Procedures Chapter 2
Figure 6 - Frame B SCR Module Gate-Lead Connection Pinouts
Check the Pulse Transformer Board
The pulse transformer circuit board contains an isolated gate firing circuit and
also provides dv/dt protection for the SCR modules. One of these conditions
can indicate a malfunction of these devices:
• An Overcurrent fault (F13
• A blown or tripped incoming protection device
• Erratic motor operation
Use the following procedure if a malfunction in this circuitry is suspected.
1. Read the General Safety Precautions on page 10 .
2. Remove power from the device.
• For frame A devices, see page 33
• For frame B devices, see page 79
3. Remove the protective covers from the device.
• For frame A devices, see page 36
• For frame B devices, see page 80
4. Remove the control electromagnetic interference (EMI) shield and
control board.
• For frame A devices, see Control EMI Shield and Control Circuit
Board Replacement page 48 .
• For frame B devices, see Remove the Communication Adapter and
Electromagnetic Interference Shield page 83 .
1
2
3
2
1
3
1
2
3
2
1
3
1
2
3
2
1
3
1 01 2 02 3 03
5 4
7 6
5 4
7 6
5 4
7 6
4 5
6 7
4 5
6 7
4 5
6 7
Gate Lead
Pinouts
Gate Lead
Pinouts
SCR