Rockwell Automation 1395 Digital DC Drive - Manual (Page 21)

Publication 2361-5.01 July 1998
Product Overview 1-9
The power stage interface board provides the following services
between the main control board and other boards in the system:
• furnishes DC control power to the main control board (from the
unit power supply)
• provides 3-phase line synchronization signals to the main control
board
• accepts signals from the main control board and produces the
logic and drivers for armature and field-pulse transformers
• accepts signals for start/stop logic, protection I/O, and drivers for
operating the main DC contactor
Unit Power Supply Board
The unit power supply board converts 115V AC input into regulated
+5V DC and ±12V DC control voltages. These control voltages are
routed through the power stage interface board to provide power to all
the printed circuit boards.
Figure 1.6
Unit Power Supply Board
J1
1
2
3
F1
C on nection to Power
S tag e Interface B oard
(+ 5V an d ± 12V)
C on nection to Pow er
Stag e Interfac e B oard
(115V A C )