S5-90U/S5-95U
Technical Description
Note
An interference pulse lasting approximately 150 µs is generated on switching on the
supply voltage to the onboard I/O. "Normal" inputs do not accept this pulse. High-speed
inputs (e. g. counters) recognize this pulse as a singal.
Programmer Interface
Interface for a programmer or operator control and monitoring device (TD or OP). The programmer
interface can also be used for connecting the S5-90U and S5-95U as slaves to the SINEC L1 LAN.
SINEC L2 Interface or Second Serial Interface (Optional)
The S5-95U is also available with a SINEC L2 interface or a second serial interface.
The SINEC L2 interface enables the PLC to be linked with the SINEC L2 LAN either as active or
passive station. In this way, for instance, several S5-95U PLCs can be networked.
The second serial interface represents an additional TTY interface with the following characteristics:
•
SINEC L1 point-to-point master and SINEC L1 slave
•
3964(R) computer link
•
ASCII driver
•
Programmer functions
E(E)PROM Submodule (for Plugging in)
EPROMs or EEPROMs are non-volatile memory types for permanent storage of the control program.
After an overall reset of the PLC or a power failure without battery backup, the control program is
automatically loaded from the memory submodule into the RAM when the PLC is switched to
POWER ON.
External I/O Bus
The external I/O bus forms the electrical connection between the PLC and the S5-100U modules
used for expanding the PLC.
Processor and Arithmetic Unit
The processor executes the statements of the user program. The arithmetic unit consists of two
registers, accumulators 1 and 2, and the condition codes. All arithmetic operations are processed in
the accumulators. The condition codes provide information on unusual events during an arithmetic
operation, such as violations of the permissible value range.
EWA 4NEB 812 6115-02b
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