Siemens SIMATIC S5-100U System Manual page 417

S5-100U
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, output 5.1 is to be set.
STL
A I 4.1
= Q 5.1
EWA 4NEB 812 6120-02b
Terminal Connections
1 3 5 7
2 4 6
As soon as the limit is reached or exceeded, input 4.1
becomes "1"; this sets output 5.1 to "1".
9
8 10
+ -
Explanation
Function Modules
15-3