Beckhoff EL1904 - EL1904 pin assignment

Operation
EL1904 33Version: 3.0.0
5.2.4.4 EL1904 pin assignment
Fig.14: EL1904 pin assignment
Terminal point Input Signal
1 1 Input 1+
2 Input 1-
3 3 Input 3+
4 Input 3-
5 2 Input 2+
6 Input 2-
7 4 Input 4+
8 Input 4-
Configurable inputs
The inputs 1 to 4 can be occupied as you want with normally closed contacts or normally open
contacts. The corresponding analysis is carried out in the safety PLC.