Siemens Simatic SM331 User Manual

Electrical connection
5.3 Wiring of the analog module
SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA
5-8 Getting Started, 11/2006, A5E00253410-02
5.3.4 Test
Proceed as follows
If you want to test the wiring, you may now switch the power supply on.
Do not forget to set the CPU to STOP (see the red circle)
Figure 5-5 Successful wiring, CPU in position STOP
If a red LED is lit, then there is an error in the wiring. Verify your wiring.

Siemens Simatic SM331 Specifications

General

Brand	Siemens
Model	Simatic SM331
Category	Control Unit
Language	English