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IP 240
1
System Overview
Intelligent input/output modules (I/Os) extend the field of applications of the SIMATIC S5
programmable controller system. They are technology-oriented and off-load the central pro-
cessor by preprocessing the input signals.
Digital input modules can resolve pulses up to a frequency of 100 Hz. The IP 240 can be used for
applications with higher frequencies and for connecting incremental encoders.
The module can be used in four modes:
•
Position decoding
•
Counting
•
IP 252 expansion (only in the S5-115U programmable controller)
•
Positioning
It is configured in the desired mode by the user program.
5 V
M
int
•
•
•
S5 bus
EWA 4NEB 811 6120-02a
•
IP 240
Interrupt circuit
Fig. 1-1. Modes of the IP 240 Module
Position decoding
Counting
Configuration
for channel 1
IP 252 expansion
Positioning
Outputs, channel 1
Position decoding
Counting
Configuration
for channel 2
IP 252 expansion
Positioning
Outputs, channel 2
System Overview
1-1
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