6.3 FSM 2.0 – STO
6.3.1 Features
The Functional Safety Module FSM 2.0 – STO serves as an expansion of the servo positioning
controller ARS 2000 FS.
It reaches the function “Safe Torque Off” (STO) with SIL3 according to EN 61800-5-2 / EN 62061 /
IEC 61508 or category 4 / PL e according to EN ISO 13849-1.
It reaches the function “Safe Torque Off” (STO) with SIL3 in accordance with EN 61800-5-2 and
PL e in accordance with EN 13849-1.
It is equipped with a floating feedback contact.
It can be simply plugged into the basic unit from the outside, so that it can be used for upgrading
systems that are already equipped with ARS 2300 FS servo positioning controllers.
It is exclusively suitable for the ARS 2000 FS product range.
It offers a user-friendly parameterisation with the Metronix ServoCommander
®
software.
DANGER!
The function STO as a sole safety function is not sufficient for drives under
permanent torque, such as hanging loads.
DANGER!
For drives, the function STO must be validated after installation and after any
changes of the installation.
This validation must be documented by the commissioning engineer.
6.3.2 Pin assignment [X40]
Pin no. Name Value Specification
8 0V 0 V Reference potential for internal controller supply
7 24V +24 V DC 24 V supply out
6 C2 Feedback contact for the state “STO” to an external
control
5 C1
4 0V_B 0 V Reference potential for STOB
3 STOB 0 V / 24 V Control input B for the function STO
2 0V_A 0 V Reference potential for STOA
1 STOA 0 V / 24 V Control input A for the function STO
The functionality of the DIP switches is identical to the functionality of the DIP switches
of the module FSM 2.0 – FBA.
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