Siemens SIMATIC Box PC 820 User Manual

5-6
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
Pin TypeSignal namePinType *Signal name
C9 –MEMR I/O D9 DRQ 0 I
C10 –MEMW I/O D10 –DACK5 O
C11 SD 08 I/O D11 DRQ 5 I
C12 SD 09 I/O D12 –DACK6 O
C13 SD 10 I/O D13 DRQ 6 I
C14 SD 11 I/O D14 –DACK7 O
C15 SD 12 I/O D15 DRQ 7 I
C16 SD 13 I/O D16 + 5V V
CC
C17 SD 14 I/O D17 –MASTER I
C18 SD 15 I/O D18 0 V GND
Under normal conditions, the signals –SBHE, LA17 – LA23, –MEMR and MEMW
are operated as outputs (sending from the CPU). Only CPU boards which are
suitable for use as a master CPU for system bus access send and receive these
signals. A minus sign “–” in front of the signal name shows that the signal is LOW
active.
Bus Board
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Siemens SIMATIC Box PC 820 Specifications

General

Brand	Siemens
Model	SIMATIC Box PC 820
Category	Industrial PC
Language	English