Controlling The Safety Functions Via Fail-Safe Inputs - Siemens Sinamics G120 CU240E Operating Instructions Manual

Functions
5.12 Safety-related applications
5.12.3

Controlling the safety functions via fail-safe inputs

Connecting sensors to fail-safe inputs
The fail-safe inputs of the frequency inverter are designed for connecting electromechanical
sensors with two NC contacts.
It is not possible to directly connect sensors with two NO contacts and antivalent contacts (1
NO contact and 1 NC contact).
Figure 5-40
The following diagrams show the principle possibilities of connecting-up fail-safe inputs:
● Connecting sensors with electromechanical contacts, e.g. Emergency Stop mushroom
● Connecting electronic sensors, e.g. SIMATIC FS-400 light curtains
● Connecting safety relays, e.g. SIRIUS 3TK28.
● Connecting fail-safe outputs, e.g. SIMATIC F digital output modules
200
Sensors that can be connected to the fail-safe inputs
pushbuttons and end position switches
Figure 5-41 Connecting an electromechanical sensor
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.