Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control - Manual (Page 312)

312 Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014
Chapter 5 Component Definition and Maintenance
The yellow LED (LED 1) on the SGPDB indicates that the SCR being
controlled has a gating current flowing which is used to turn the SCR on.
Figure 259 - Self-Powered Gate Driver Board
Terminal/connections description
TB1-1 – Connection to SCR snubber circuit 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 81001-
262-51, this input is shorted to TB3-1 to obtain the sense voltage.
Test power connection
Fiber optic transmitter
and receiver
Thermal sensing
connection
TP9
TP8
TP7
TP6
TP3
TP4
TP5
Gate and cathode
thyristor connection
LED
Snubber connection
TP1
TP2
Test power connection
Fiber optic transmitter
and receiver
Thermal sensing
connection
TP9
TP8
TP7
TP6
TP3
TP4
TP5
Gate and cathode
thyristor connection
LED
Snubber connection
TP1
TP2