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Safe Torque OFF (STO) for MAC motors MAC400-4500

 
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 connector is only available on following products for Servo motors: MAC400, MAC402, MAC1500, MAC3000, MAC4500
 
Important general information:
  • The STO function is not approved by any third party laboratory (only pendent)
  • Please notice that removing the energy from the motor by use of the STO function do not necessarily stop the motor rotation since any attached load inertia will have an influence when the movement is stopped fully
  • The person that install and service the motor must have a general knowledge concerning electrical equipment and safety functions
  • The STO function is considered as functional and reliable for 20 years
 

The STO is only available on following products for Servo motors: MAC400, MAC1500, MAC3000. Notice that MAC402 also can be delivered with STO connector but can and will not be official TUV approved due to hardware limitations.
 
 
For Stepper Motors: MIS17xQ/R/S/T ,MIS23x/Q/R/S/T , MIS34x, MIS43x, MIL23xQ/R/S/T, MIL34x, SMC66 and SMC85. Read more about STO for ServoStep here.
 
Partnumber
MAC400 (Can be delivered with STO connector but not approved by TUV. TUV pending)
MAC402 (Can be delivered with STO connector but not approved by TUV. Not TUV pending)
MAC1500, MAC300,MAC4500 (Can be delivered with STO connector but not approved by TUV. TUV pending)
 
Ordering information:
MACmotors motors with the STO function installed are identified in the 3 last digits of the type number as seen below. A mean standard motor without STO connector. S mean with STO connector.
 
Partnumber STO connector
MAC400-D5-FAGM No
MAC400-D5-FSGM Yes
MAC1500-D2-CAAL No
MAC1500-D2-CSAL Yes
 
 
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 +24VDC in order to energize the motor and make any motor movement possible.
 
If only one of the inputs is not applied +24VDC the internal STO circuit will remove the energy from the motor.
The illustration below shows the pinout of the connector

 
Accessories:
 
Disabling the STO function (NON-STO plug)
If the STO function is not needed the plug JVL type WI1010-M08M3T05P 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.
 
Standard cable
The standard cable is mandatory to use in applications where high safety is required.
 
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
 


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