Siemens SINAMICS S150 Operating Instructions Manual page 108

Electrical installation
4.9 Other connections
Functional principle
Two independent channels of the integrated safety function are activated via the relays (K41,
K42).
The relay K41 activates the signal to the control unit that is necessary for the safety function
and the relay K42 on the Power Module or Motor Module respectively
The selection and deselection must be executed concurrently. The time delay that is
unavoidable due to mechanical switch processes can be adapted via parameters.
The circuit is structured so that it is protected against wire break, i.e. if the relay's control
voltage fails then the safety function is active.
A checkback signal can be derived for information, diagnostics, or troubleshooting from the
normally-closed contact switched in series of the relay. Wiring of the checkback signal can
be executed optionally and is not part of the safety concept.
Note
The checkback signal is not necessary to satisfy the DIN EN ISO 13849-1 (formerly EN-954-
1) cat. 3 standard.
The selection of the safety function must be executed over two channels. A switch in
accordance with ISO ISO 13850/ EN 418, positive opening in accordance with EC 60947-5-
1, or a certified safety controller must be used as activation element. The correct selection of
the activation element to comply with the desired standard for the overall system is the
responsibility of the user.
Customer interface –X41
Table 4-48
Terminal
-X41:1
-X41:2
-X41:3
-X41:4
-X41:5
-X41:6
-X41:7
-X41:8
-X41:9
-X41:10
108
Terminal strip -X41
Meaning
Activation –K41: A1
Connected with -X41:1
Activation –K41:A2, -K42:A2 , N conductor or ground
Connected with -X41:3
Checkback signal, status –K41, -K42
Checkback signal, status –K41, -K42
Activation –K42: A1
Connected with -X41:7
Not assigned
Output -K41: Permanently wired with CU320: X132:4 (DI7)
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A