Controller unit, Expansion unit – Toshiba EX250 User Manual
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The compact modular structure of the EX250/500 is designed for easy installation. Diagnostic LEDs are
immediately visible, and components can be readily removed and replaced.
CONTROLLER UNIT
The only difference between the EX250 controller and the EX500 controller is the CPU card. The
controller unit consists of:
• CPU which contains
1, CPU Card.
2, Power Supply Card.
3, Space for Optional Computer Interface Card
• Backplane which contains space for 8 I/O Modules
DIAGNOSTIC LEDs (RUN, CPU, I/O,
PROG, POWER. ВАТТ, COMM, HOLD)
RUN/HALT selector switch
EXPANSION UNIT
The expansion unit consists of a backplane and space for additional I/O modules.
Cable connector
to controller unit