Siemens SIMATIC S7-1200 매뉴얼 - 페이지 13

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Siemens SIMATIC S7-1200 매뉴얼
3 Function Principle of the Application Example
3.3

Safe torque off STO

3.3.1

STO via digital inputs

The converter with the "Safe Torque Off" (STO) function active prevents the
unwanted startup of machine components. This safety function can be configured
with specific digital inputs for a SINAMICS G120 drive with a control unit with safety
function. To do this, the safety functions must be enabled in the control unit.
Note
A detailed description of the configuration of the safety function STO using digital
inputs can be found in the application example "SINAMICS G: Speed Control of
a G110M / G120 (Startdrive) with S7-1500 (TO) via PROFINET or PROFIBUS
with Safety Integrated (via Terminal) and HMI".
https://support.industry.siemens.com/cs/ww/en/view/78788716
3.3.2

STO as per SIL 3 with power module PM240-2

The PM240-2 power modules in sizes FSD, FSE and FSF can be used to realize
the "Safe Torque Off" (STO) according to EN 13849-1 and SIL 3 according to
IEC61508. Two terminal blocks (STO_A and STO_B) and two Dip switches are
available on the front side of the power module.
Note
More information on how to use the STO safety function as per SIL 3 with the
PM240-2 power module can be found in the "SINAMICS G120 power module
PM240-2" manual.
https://support.industry.siemens.com/cs/ww/en/view/109482011
Drehzahlachse mit SINA_SPEED
Entry-ID: 109485727,
V1.0,
06/2017
13