Rockwell Automation Publication 7000-UM202H-EN-P - November 2023 103
Chapter 2 Power Component Definition and Maintenance
Terminal/Connections
Testing Procedure for SCR
Self-Powered Gate Driver
Board
Testing Equipment
Ensure you have the following equipment available in order to perform testing
tasks.
• Digital oscilloscope
• Function generator w/duty cycle control
• DC power supply (+15V @ 300 mA required)
• Digital multimeter
• Temperature sensor board (80190-639-02)
• SPS test power harness (80018-695-51)
Procedure
1. Connect a clamped ABB #5STP03D6500 SCR to the gate-cathode leads of
the SPGDB board (TB4-1/TB4-2).
2. Attach a temperature sensor board to the TB2-1/TB2-2 terminals.
3. Apply +15V test power to terminals TB3-1 and TB3-3 (TB3-1 is at +15V
while TB3-3 is the +15V return). Leave TB3-2 open.
4. Measure TP4 to TP3, which should be +14.4V, +/-100mV.
5. Measure TP5 to TP3, which should be +5.0V, +/- 250mV.
6. Measure TB2-1 to TB2-2, which should be +14.4V, +/-100mV.
7. Measure the voltage at U4-pin2 to COM, which should be +1.0V, +/-
100mV.
8. Measure the voltage at U4-pin3 to COM, which should be 0V.
9. Measure the voltage at U4-pin7 to COM, which should be +3.6V, +/-
100mV.
10. Verify that the OT1 LED is off.
11. Measure TP7 to TP3, which should be 0V.
12. Measure TP9 to TP3, which should be +5.0V, +/- 250mV.
13. Measure TP8 to TP3, which should be 0V.
14. Measure TP1 to TP2, which should be 0V.
15. Connect a jumper between TB3-1 and TB3-2 and verify that the voltage at
TP6 is +2.2V, +/-100mV.
TB1-1
Connection to SCR snubber circuit (capacitor connection end) used to extract energy from the
snubber for SPGDB operation.
TB1-2 Connection to SCR sensing resistor which indicates conduction status of SCR being operated.
TB2-1
Positive 20V power supply connection to temperature sensor board. Provides power to temperature
sensor board.
TB2-2 Common connection of positive 20V power supply to temperature sensor board.
TB3-1
Positive 15V power supply connection for test power used when commissioning drive or testing
SPGDB.
TB3-2
Provides artificial sense voltage signal to allow SPGDB to gate the SCR when in test mode. When the
appropriate test power cable is used, P/N 80018-298-51, this input is shorted to TB3-1 to obtain the
sense voltage.
TB3-3 Common connection of positive 15V power supply used for test power
TB4-2 Cathode connection to SCR being controlled
TB4-1 Gate connection to SCR being controlled
OP1 Blue fiber optic cable receptacle – gating pulse command from the processor
OT1 Grey fiber optic cable receptacle – diagnostic status of the SCR
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