Festo CMMT-ST-C8-1C S0 Series Manual
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Festo CMMT-ST-C8-1C S0 Series Manual

Sub-function sto, ss1-t
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CMMT-ST-C8-1C-...-S0
Servo drive
Manual | Safety
sub-function | STO,
SS1-t
8154451
2021-04b
[8154453]

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Summary of Contents for Festo CMMT-ST-C8-1C S0 Series

  • Page 1 CMMT-ST-C8-1C-...-S0 Servo drive Manual | Safety sub-function | STO, SS1-t 8154451 2021-04b [8154453]...
  • Page 2 Translation of the original instructions ET 200 , PNOZ , Pilz , SIEMENS , ET 200SP are registered trademarks of the respective trademark ® ® ® ® ® owners in certain countries.

  • Page 3: Table Of Contents

    Digital inputs and outputs [X1A] ........29 Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 4: About This Document

    • Observe the safety instructions in the documentation è Operating instructions Assembly Instal- lation Safety sub-function. All available documents for the product è www.festo.com/sp. Product version This documentation refers to the following version: – Servo drive CMMT-ST-...-S0, revision 1 and higher, see product labelling.

  • Page 5: Intended Use

    CMMT-ST. Wire the passive diagnostic contacts as a group in series and connect the last pas- sive diagnostic contact directly to the safe controller for evaluation of the diagnostic information. – Use of the diagnostic contact STA to switch a safety function. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 6: Training Of Qualified Personnel

    The product is a safety device in accordance with the EC Machinery Directive. For details of the safety-oriented standards and test values that the product complies with and fulfils, see è 9.1 Technical data, safety engineering. Please note that compliance with the listed standards is limited to the CMMT-ST-...-S0. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 7: Additional Information

    Product overview Additional information – Contact the regional Festo contact if you have technical problems è www.festo.com. Product overview Safety sub-functions 4.1.1 Function and application The servo drive CMMT-ST-...-S0 has the following safety-related performance features: – Safe torque off (STO/Safe torque off) –...
  • Page 8 After the safety sub-function STO has been requested and the request completed, the functional controller enable must be activated. Feedback via diagnostic contact STA The state of the safety sub-function STO can be reported to the safety relay unit via the diagnostic contact STA. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 9 #STO-A and #STO-B signals for high level with low testpulses and for low level with high testpulses, within the specified limits è 4.1.6 Safety relay unit. The diagnostic contact STA is not evaluated in terms of safety engineering. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 10 STO,TP Max. delay until STO switches off (≤ permissible reaction time when a safety STO,In sub-function is requested Feedback, STO active Maximum permissible delay for diagnostic feedback after the safety func- STA,Rise tion is requested Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 11: Safety Sub-Function Ss1-T

    3. Request for a safety sub-function STO once the delay time has elapsed The figure below shows the necessary logic circuits for the safety relay unit: The delay times are directly included in the reaction time of the system. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 12 2-channel input for STO request Feedback, STO active Braking ramp completed (controlled functionally), rotational speed = 0 Brake closed (if present) and output stage switched off (functionally) > t Rotational speed Tab. 4: Legend for SS1-t timing Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 13: Cross-Wiring Of Several Servo Drives

    PP-switching output modules, SIEMENS ET 200S, for example, would be suitable. The input module CPX-F8DE and output module CPX-FVDA-P2 from Festo would be suitable too. Comment: The safe output module CPX-FVDA-P2 can only switch potential-free loads. It can only be used, therefore, in combination with an interposed relay, since #STO-A and #STO-B are referred to Festo —...

  • Page 14: Interfaces Of The Pds

    – During installation, make sure you meet the requirements of EN 60204-1 relating to the use of PELV fixed power supplies. In the event of a fault, the voltage must not exceed 60 V DC. The safety relay unit must switch off its outputs in the event of a fault. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 15: Sto Installation

    The digital input #STO-A must not be connected to the digital input #STO-B. Make sure that no bridges or the like can be used parallel to the safety sub-function. The diagnostic contact STA indicates whether the safe state has been reached for the safety sub-func- tion STO. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 16 2. If required, use a safety relay unit with detection of shorts across contacts. STO connection example In this example, the safety sub-function STO (safe torque off ) is triggered by an input device that makes the safety request (e.g. light curtain). Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 17 The safety relay unit can use the diagnostic contact STA to monitor whether the safe state has been reached for the safety sub-function STO. The CTRL-EN wiring shown is not required for the safety sub-function STO. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 18: Ss1-T Installation

    The first diagnostic contact of the CMMT-ST must be supplied with 24 V. The diagnostic contacts of the sequential devices must then be wired in series. Connect the last diagnostic contact for evaluating the diagnostic information to the safe controller. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 19 In these cases, the diagnostic contacts must be individually connected on separate inputs of the safe controller. The inputs #STO-A and #STO-B can continue to be wired in parallel. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 20 SIL 3, cat. 3, Ple (è Fig. 8). Here, the diagnostic contacts of the CMMT-ST must be individually evaluated. The maximum number of 10 devices applies in this case for all devices wired together, regardless of the type. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 21: Commissioning

    Use of safety functions NOTICE The safety sub-function STO is already available on the servo drive on delivery without the need for any additional parameterisation. Prior to initial commissioning, wire the safety sub-function STO as a minimum. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 22: Check Lists

    Yes o regarding the residual risks? No o Can it be guaranteed that the implemented protective measures have Yes o not led to a deterioration in the working conditions of the operating No o personnel? Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 23 X1A: have the connection instructions been taken into account? . No o Functional tests: Yes o No o Actuation of the system emergency stop: is the drive brought to a Yes o standstill in the desired manner? No o Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 24: Operation

    The CMMT-ST is maintenance-free during its period of use and specified service life. The machine manufacturer must ensure the device is protected against restart according to the EN ISO 14118 standard “Safety of machinery – Prevention of unexpected start-up”. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 25: Malfunctions

    2. Send the defective product unchanged, together with a description of the fault and application, back to Festo. 3. Check with your regional Festo contact person to clarify the conditions for the return shipment. 4. Validate the safety function after any modification to the installation. Validation check lists è 6.2 Check lists.
  • Page 26 Probability of dan- [1/h] 9.5 * 10 6 * 10 3.6 * 10 gerous failure per hour in accordance with EN 61508, PFH Mean time to 2000 1600 dangerous failure in accordance with EN ISO 13849-1, MTTF Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 27 Tab. 12: Safety reference data for the safety sub-function STO The technical data for the safety sub-function SS1-t must be calculated individually according to the application. Use the specified safety reference data for STO for the calculation. Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 28: Technical Data, General

    5 … 95 (non-condensing) Permissible altitude 3000 (above sea level) Tab. 16: Ambient conditions, storage Ambient conditions, operation Ambient temperature [°C] 0 … +50 Relative humidity 5 … 90 (non-condensing) No corrosive media permitted near the device Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...

  • Page 29: Technical Data, Electrical

    24 (relative to 0 V at X9) Permissible voltage [V DC] –3 … 30 range Max. input voltage, 28.8 high level (U H max Min. input voltage, high level (U H min Max. input voltage, low level (U L max Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 30 100 (not short-circuit proof ) Max. internal resist- [Ω] < 6 ance Off-state current (con- [µA] < 2 tact open) Closing reaction time [ms] . 80 (typ. 20) STA,Rise Opening reaction time [ms] ≤ 50 (typ. 30) STA,Fall Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 31 Technical data Diagnostic contact STA at [X1A] Galvanic isolation Via optocoupler Protective functions Overvoltage-resistant up to 60 V DC Tab. 20: Diagnostic contact STA-C1/C2 at [X1A] Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b...
  • Page 32 Copyright: Festo SE & Co. KG 73734 Esslingen Ruiter Straße 82 Deutschland Phone: +49 711 347-0 Internet: © 2021 all rights reserved to Festo SE & Co. KG www.festo.com...

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