Hitachi L200 Series Service Manual page 8

Appearance
The appearance of SJ200 follows below.
OPE
I/O PCB (PCB3)
Power PCB (PCB2)
Core PCB (PCB1)
IGBT / DM
OPE is a control unit.
Formally OPE is attached to SJ200.
But another OPE can be used optionally.
This part is a logic circuit.
It has a microcomputer,
which does calculation of the
intelligent input, output, communication task
and so on
This part is a power circuit.
It has a translator
This part is a core circuit.
It has a microcomputer , which manages INV main
function.
IGBT / DM. is a transistor unit for outputting to the
motor. It depends on the capacity and the voltage class
whether IGBT or DM is used.
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