DC BUS BOARD, POWER BOARD,
AND GATEWAY BOARD
The DC Bus Board receives approximately 65VDC
from the Bus Board rectifier. The DC Bus Board regu-
lates that 65VDC to a +40VDC supply. This regulated
40VDC is applied to the Feed Head Board, the Power
Board, and the wire feeder receptacle.
The switching power supplies on the Power Board sup-
ply a variety of regulated DC voltages to the Control
Board and a +20VDC to the STT Chopper Board. The
Control Board uses these regulated voltages to power
the many circuits and communication functions incor-
porated within the Control Board.
When the Feed Head Board activates the Voltage
Sense Board, the actual arc voltage is sensed (lead
67), and this information is delivered through the volt-
age sense board to the Control Board.
The Power Wave 455M uses two digital communica-
tion platforms. Internally the PC boards communicate
via ArcLink. Externally the Power Wave 455R commu-
nicates using the industry standard Device Net proto-
cols. The Gateway Board makes the translation
between the two platforms possible. The Power Wave
455R does not have a dedicated interface device or
board. The robot (or other input device – PLC, etc.)
acts as the user interface, issuing commands through
the Device Net protocol that are translated by the
Gateway Board to ArcLink compatible messages. The
following block diagram (Figure E.5) depicts the flow of
communication information.
E-5 E-5
THEORY OF OPERATION
POWER WAVE 455M/MSTT
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
