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, BATT, COMM, HOLD)
Controller CPU
Cable connector to
expansion unit
EXPANSION UNIT
+ 5 V power supply
from controller unit
RUN/HALT selector switch
The expansion unit consists of a backplane and space for additional I/O modules
.
Cable connector
to controller unit
Cable connector for
Programmers
I/O status LEDs