Festo CMTT-AS S1 Series, Description, Page: 6 / 46

The safety functions are to be checked at adequate intervals for proper functioning. Selecting the type
of test and time intervals within the stated time period is the responsibility of the operator. The check
is to be conducted such that flawless functioning of the safety device can be verified in interaction
with all components. Time period for cyclical test
è 9.1 Technical data, safety equipment.
Prior to initial commissioning, wire the control inputs of the safety sub-functions STO and SBC. The
safety sub-functions STO and SBC are available on the CMMT-AS on delivery without the need for any
additional parameterisation.
Keep the documentation somewhere safe throughout the entire product lifecycle.
2.2 Intended use
The CMMT-AS-...-S1 supports the following safety sub-functions in accordance with EN 61800-5-2:
–
Safe torque off (STO)
– Safe brake control (SBC)
– Safe stop 1 (SS1), achievable with suitable safety relay unit and appropriate wiring of the servo
drive
The safety sub-function STO is intended to disconnect the torque of the connected motor, thereby pre-
venting an unexpected restart of the motor.
The safety sub-function SBC is intended to safely hold the motor and axis in position at standstill.
The safety sub-function SS1 is intended for performing a rapid stop with subsequent torque switch-
off.
2.2.1 Application areas
Safety sub-functions may only be used for applications for which the stated safety reference values
are sufficient
è 9.1 Technical data, safety equipment.
2.2.2 Permissible components
The logic supply must meet the requirements of EN 60204-1 (protective extra-low voltage, PELV).
If holding brakes and clamping units without certification are used, the suitability for the related
safety-oriented application must be determined through a risk assessment.
The motors must fulfil the requirements of EN 61800-5-2 appendix D.3.5 and D.3.6 and of
EN 60204-1. Motors approved or specified by Festo for the CMMT-AS fulfil the requirements.
The motor cables and brake lines must fulfil the requirements of EN 61800-5-2 appendix D.3.1 and of
EN 60204-1. Motor cables and brake lines approved by Festo for the CMMT-AS fulfil the requirements.
2.3 Foreseeable misuse
Foreseeable misuse, general
– Use outside the limits of the product defined in the technical data.
– Cross-wiring of the I/O signals of more than 10 servo drives CMMT-AS.
– Use in IT networks without insulation monitors for detection of earth faults.
If the device is operated in IT networks, the potential conditions will change in the event of a fault
(earth fault on the feeding mains supply). As a result, the rated voltage of 300 V to PE – which has
important implications for the design of insulation and network disconnection – will be exceeded.
This error must be detected.
Safety
6 Festo — CMMT-AS-...-S1 — 2018-10a