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STO SIL3/PLe TÜV-approved integrated ServoStep NEMA 17-43

The STO Function can be used for disabling the energy to the motor. The motor will thereby be set in a state where it produces no torque.
 
The STO function have its own input connector mounted at the front of the motor.
 
It is a two input system and it is required that both inputs are activated (applied with a voltage) before the motor is energized and can operate normally.
 
The STO is available for all ServoStep products.

Safety standards IEC 61508-1:2010
IEC 61508-2:2010
IEC 61800-5-2:2016
IEC 62061: 2015
ISO 13849-1:2015
ISO 13849-2:2012
SIL/SILCL 3
PL E
SFF (%) 96
PFHd (1/h) 1.38e-10
MTTFd (yrs/channel) 854
DC (%) 96
Cat. 3
SC 3
HFT 1
CCF 75
Lifetime (yrs) 20
 
Why MIxyyz written on the Safety approved?
This is just a general short type code to the describe the whole range, so this certification covers a lot of different type numbers:
x = S,L (S=Rotary movement, traditional stepper MIS range and L=Linear actuator MIL range)
yy=17,23,34,43 (defines the motor flange size)
z = 0,1,2,3,4,5,6 (defines the maximum torque)
 
Partnumber
Partnumber Motor STO Connector
MIS17xQ/R/S/T
MIL17xQ/R/S/T
User Manual
MIS23x/Q/R/S/T
User Manual
MIS34x,
MIL34x
User Manual
MIS43x
User Manual
SMC66x (Under development)
User Manual
SMC85x (Under development)
User Manual
 
Accessories:

Disabling the STO function (NON-STO plug)
If the STO function is not needed the plug JVL type WI1010-M08M4SSTO must be inserted in the STO connector.
 
The need of this external plug to disable the STO function is to obtain a high safety level and make sure that no misunderstandings will occur concerning whether the STO function is active or not.

Part number: WI1010-M08M4SSTO 
 
Standard cable
The standard cable is mandatory to use in applications where the TÜV approval is required. 
 
Part number: WI1010-M08M4V05P 
 
How to connect and use the STO function:
 
The STO connector contains the two enable inputs STOA and STOB. Both inputs must be applied nominal +24 VDC in order to energize the motor and make any motor movement possible.

If only one of the inputs is not applied +24 VDC the internal STO circuit will remove the energy from the motor. Please note: In a SIL3/PLe application, both channels must be controlled simultaneously.
The illustration below shows the pinout of the connector

 
Ordering information:

ServoStep motors with the STO function installed are identified in the last two digits of the type number as seen below:
 
 
European directives
Machinery Directive (2006/42/EC)
EN ISO 13849-1/2
EN IEC 62061
EN IEC 61800-5-2
EMC Directive (2014/30/EU)

EN 61000-6-3
EN 61800-3
Low Voltage Directive (2014/35/EU)

EN 61800-5-1
Safety standards
Safety of Machinery
EN ISO 13849-1/2, IEC 62061, IEC 60204-1
Functional Safety
IEC 61508-1/2, IEC 61800-5-2
Safety function

IEC 61800-5-2
IEC 60204-1
Safe Torque Off (STO)
Stop Category 0
Safety performance
ISO 13849-1
Category Cat 3
Diagnostic Coverage DCavg: 98,5 % (Medium)
Mean Time to Dangerous Failure (per channel) MTTFd: 100 years (High)
PFHd 4,29e-8/h
Performance Level PLe
IEC 61508/IEC 62061
Safety Integrity Level SIL 3, SIL CL3
Probability of Dangerous Failure per Hour PFHd: 1,38e-10/h
(High Demand Mode)
Diagnostic Coverage DC: 96 %
Safe Failure Fraction SFF: 96 %
Common Cause Failure Factor CCF 5 %
Hardware Fault Tolerance HFT: 1 (1oo2)
Proof Test Interval T1 20 Years
Mission time TM 20 Years
Reaction time
Input to output response time Maximum 8 ms.
Response time (internal fault) Maximum 200 ms.
 
SISTEMA:
The SISTEMA software utility provides developers and testers of safety-related machine controls with comprehensive support in the evaluation of safety in the context of EN ISO 13849-1.
 
Many companies use the SISTEMA libraries when designing a machine with several safety components. JVL offers for particular technologies continuously growing SISTEMA-Libraries. The libraries can be used with SISTEMA starting from version 1.1.1. Download the tool here Link to SISTEMA Library.
 
Your advantages:
  1. Fast calculation of the Performance Level
  2. Easy and fast access to safety relevant data
  3. Data for certified and standard components
  4. The tool is supported by many manufacturers

Link to preliminary safety manual. (see latest in user manual)
 
 
 

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