
1. System Configuration
1.4
CPU module As shown in the table below, the CPU module is available in two
types.
Type Specification
PU315
RAM (battery backup), 32K steps for user program,
ladder diagram, SFC
PU325
EEPROM+RAM (battery backup), 32K steps for user program,
ladder diagram, SFC
PU315/PU325
Status display LED (RUN, FAULT. I/O, BATT)
RAM/ROM switch
Operation mode switch (HALT/RUN/P-RUN)
Battery cover
RS232C port for the programmer
(D-Sub 9-pin female connector)
RS485 port for the computer iink
(D-Sub 15-pin female connector)
1C memory card slot
IC memory card ejection button
Module fixing screw
User's manual - Hardware
15
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