S5-115U Manual
Module Slots
C.7
Legend for Connector Pin Assignment
Supply voltage for all modules
Ground for+5 V and+5.2 V
Supply voltage for PG 605U and PG 615
Supply voltage for 20 mA interface and programming voltage for
PG 615
Ground for+24 V
3.4 V battery voltage for RAM back-up
Reset pulse for all modules
Reset pulse request (initiates or extends a Reset pulse).
Battery failure; signal is generated if there is no battery plugged
in or if the battery is low.
Powerfail; signal is generated shortly before the supply voltage
fails.
I/O not ready; signal is generated when power supply in the
expansion unit fails.
Data back-up; signal is generted with a delay after NAU and
switches the battery-backed RAM to 'Standby' in the case of some
modules (hardware-implemented).
Command output disable; signal is generated when the CPU
stops. The signal disables the digital output modules.
Memory Read; is generated on every Read access.
Memory Write; is generated on every Write access.
Ready; signal acknowledging MRD or MWR access.
Memory I/O Select; is generated every time peripheral memory is
accessed.
Interface module free; the central controller is operated without
interface module. A terminating resistor connector must be
plugged in instead of the interface module.
Interface module plugged in
Interrupt A, B; hardware interrupt signals from intelligent I/Os.
Process interrupt; hardware interrupt signal from a digital I/O
module.
S5 bus enable for IP 252 intelligent process control module.
(only in the case of direct I/O access)
S5 bus reserved for the IP 252 intelligent process controller
module. (only in the case of direct I/O access)
Enable line for I/Os
Address bus
Data bus
+5 V
M
+5.2 V
+24 V
M24 V
U
BATT
RESET
RESETA
BAU
NAU
PEU
DSI
BASP
MRD
MWR
RDY
PESP
ASF
ASG
IRA, IRB
PRAL
HOLDA1, 2, 3
HOLD
F0 ... 8
ADB0 ... 15
DB0 ... 7
EWA 4NEB 811 6130-02b
C-11
Содержание SIMATIC S5-115U
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