DC BUS BOARD, POWER BOARD,
FEED HEAD BOARD, GATEWAY
BOARD AND VOLTAGE SENSE
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 455R uses two digital communication
platforms. Internally the PC boards communicate via
ArcLink. Externally the Power Wave 455R communi-
cates using the industry standard Device Net protocol.
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 communica-
tion information.
E-5 E-5
THEORY OF OPERATION
POWER WAVE 455/R
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
RECP.
RECP.
LEFT S.B.
CAP. V/F
RIGHT S.B.
CAP. V/F
S.B.
S.B.
