All Inputs And Outputs - Siemens SIMATIC S5-90U System Manual

System Description
Digital Inputs/Outputs
Due to their wide range of applications, the number of inputs and outputs required by the PLCs
varies considerably.
The two PLCs permit different configurations. You can therefore select the PLC that suits your
specific task.
Inputs/Outputs
Digital inputs/outputs
Analog inputs/outputs
Counter inputs
Interrupt inputs
The PLCs offer onboard digital inputs and outputs to which the required number of I/O modules of
the S5-100U range can be added.
Analog Inputs/Outputs
The PLCs also feature analog inputs and outputs. Analog inputs and outputs are incorporated on the
S5-95U board. Both the S5-90U and S5-95U can be expanded using the relevant I/O modules of the
S5-100U spectrum.
Interrupt Inputs
In addition to the above-mentioned inputs and outputs, the S5-90U and S5-95U feature onboard
inputs for interrupt processing.
Counter Inputs
Many applications require the use of counters. The onboard counter inputs of the S5-90U and
S5-95U are adequate for a great variety of counter functions.
The following onboard counter inputs are available:
• S5-90U One up counter (16-bit) Counting frequency: 1 kHz
• S5-95U One up counter (16-bit) Counting frequency: 2 kHz,
One up counter (16-bit) Counting frequency: 5 kHz.
Both up counters can be combined in a cascade to form one 32-bit up counter.
If these inputs do not meet your requirements, e.g. with respect to the counting frequency, they can
be supplemented with counter modules of the S5-100U range.
Three different counter modules are available:
• A two-channel counter module for up to 500 Hz, two down counters;
• A fast, single-channel counter module for counting frequencies up to 500 kHz, with two
comparison values, for both counting and position decoding;
• An intelligent I/O module with two counter channels for up to 58 kHz, up or down counters.
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Table 1-2. All Inputs and Outputs
Onboard
16
0
1
1
S5-90U
Maximum Onboard
208 32
16 9
13 2
1 4
EWA 4NEB 812 6115-02b
S5-90U/S5-95U
S5-95U
Maximum
480
41
66
4