Siemens SIMATIC S5-90U System Manual page 471

S5-90U/S5-95U
Typical Application
A comparator module is mounted at slot 4. The current source is connected to channel 1. If the
Schmitt trigger 1 detects that the current has exceeded the preset value, a switch (output 5.1) is to
be operated.
STL
A I 4.1
= Q 5.1
EWA 4NEB 812 6115-02b
Terminal Connections
1 3 5 7
2 4 6
Explanation
As soon as the limit is reached or exceeded, input 4.1
becomes "1"; this sets output 5.1 to "1".
9
8 10
+ -
Function Modules
16-3