Festo CMTT-AS S1 Series, Description, Page: 7 / 46

– Use of a diagnostic output for connection of a safety function.
The diagnostic outputs STA and SBA are not part of the safety circuit. The diagnostic outputs are
used to improve diagnostic coverage of the related safety sub-function. The diagnostic outputs
may only be used in combination with the related safe control signals (AND operation) plus a reli-
able time monitoring function in the safety relay unit for the purpose of switching additional
safety-critical functions.
Foreseeable misuse of the safety sub-function STO
– Use of the STO function without external measures for drive axis influenced by external torques.
If external torques influence the drive axis, use of the safety sub-function STO on its own is not
suitable for stopping the axis safely. Additional measures are required to prevent dangerous
movements of the drive axis, such as use of a mechanical brake in combination with the safety
sub-function SBC.
– Disconnection of the motor from the power supply.
The safety sub-function STO does not disconnect the drive from the power supply as defined by
electrical safety.
Foreseeable misuse of the safety sub-function SBC
– Use of an unsuitable holding brake or clamping unit, also in view of:
–
Holding or brake torque and emergency brake characteristics, if required.
– Frequency of actuation
– Use of an unsuitable logic voltage supply
2.4 Training of qualified personnel
The product may be installed and placed in operation only by a qualified electro technician, who is
familiar with the topics:
–
installation and operation of electrical control systems
– applicable regulations for operating safety-engineering systems
Work on safety-related systems may only be carried out by qualified personnel trained in safety engin-
eering.
2.5 Approvals and certifications
The product has the CE marking. For details of directives, see
è 9.2 Technical data, product conformity and approvals.
The product-related EU directives and standards are listed in the declaration of conformity
è
www.festo.com/sp.
The product is a safety device in accordance with the Machinery Directive. For details of the safety-ori-
ented standards and test values that the product complies with and fulfils, see
è 9.1 Technical data, safety equipment. Please note that compliance with the named standards is
limited to the CMMT-AS-...-S1.
3 Service
Contact your regional Festo contact person if you have technical questions è www.festo.com.
Service
7 Festo — CMMT-AS-...-S1 — 2018-10a