Connecting Sensors Directly; Permitted Sensors - Siemens SINAMICS G120 Function Manual

Activation
3.2 Activation via F-DI
Table 3- 2
Terminal on the Control Unit
Terminal 5
Terminal 6
Terminal 7
Terminal 8
Terminal 16
Terminal 17
Safety-related signals, e.g. the switching state of a sensor, must be wired on two channels
with a fail-safe digital input. The inverter evaluates the signal on two separate signal paths.
On the following pages, you will find examples of interconnecting the fail-safe digital inputs in
accordance with PL d to EN 13849-1 and SIL 2 to IEC 61508.
3.2.2

Connecting sensors directly

3.2.2.1

Permitted sensors

The fail-safe inputs of the inverter are designed for connecting 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 3-1
The fail-safe digital inputs are configured for both directly connecting safety sensors, e.g.
emergency stop control devices or light curtains, as well as for connecting pre-processing
safety relays, e.g. fail-safe controls.
44
Fail-safe digital inputs on Control Units CU240E-2 F and CU240E-2 DP-F
Digital input
DI 0
DI 1
DI 2
DI 3
DI 4
DI 5
Sensors that can be connected to the fail-safe inputs
Fail-safe input
Basic Safety
-
F-DI 0
Safety Integrated Function Manual, SINAMICS G120
Function Manual, 07/2010, FW 4.3.2, A5E03052391B AA
Extended Safety
F-DI 0
F-DI 1
F-DI 2