
1-9
System Overview
SIMATIC 545/555/575 System Manual
The 545 and 555 systems offer the following additional features:
• Local-base interrupt I/O that allows for fast reaction to external events.
• Non-volatile program storage and execution (portable EEPROM or
EPROM) to restore the initial state of your program.
• Series 505 footprint.
Figure 1-2 shows a typical 555 system.
SIMATIC
505
Siemens
555–1105
SIMATIC
555
DC POWER GOOD
AC LINE
AC NEUTRAL
GROUND
Figure 1-2 Typical 555 System
545/555-Only
Features
Comentarios a estos manuales