Rockwell Automation 23P PowerFlex DC Stand Alone Regulator and Gate Amplifier - Manual (Page 72)

72 Rockwell Automation Publication 23P-UM001D-EN-P - July 2012
Appendix A Specifications
Hardware Descriptions
The following table provides a functional description of each printed circuit
board and component of the Gate Amplifier.
Table 27 - Printed Circuit Board and Component Descriptions
Status LEDs
Each LED is briefly described in this table:
Board/Component Description
Main Board
PN-25913
The Main board provides an optical isolation layer between the Regulator and
the Gate Amplifier circuits. In addition, it provides the necessary permissive
interlock circuits and LED annunciation of system status. The output of the
Main board is connected to the Gate Driver Output board for the final stage of
amplification of the gate signals.
Gate Driver Output
(GDO) Board
(964310) The basic overall functionality of the Gate Driver Output board is as follows:
Faceplate connections are as follows:
Four top D-Shell connectors are for the SCR Forward Gates, square wave burst
firing output to power module gates in the range of 28V to 48V.
Four lower D-Shell connectors are for the SCR Reverse Gates, square wave
burst firing output to power module gates in the range of 28V to 48V.
An external power supply for the gates of up to 48V can be used. A “diode OR”
function ensures that the module utilizes the 48V supply when it is connected.
When the use of an external gate power supply is required, an interlock is
required with the drive control in case the external power supply fails. The
interlocking is accomplished with a relay with a 48VDC coil that is connected
across the external power supply and the normally open contacts are connected
into a stop circuit.
Internal Power
Supply The Power Supply provides 28V for the SCR gate firing circuits and is further
reduced for on-board logic circuit functions.
Line Fuse 5 A, 250V AC, 3AG, Time Delay
Label Description
GPS +28V Gate Power Supply output is present.
LPS +5V Logic Power Supply output is present.
GATE FUSE OK Indicates that the fuse for the External Power
Supply is “OK”. (The fuse is mounted on the Gate
Driver Output board.)
GATE POWER Indicates that all on-board systems are
functioning normally.