Safe Torque OFF (STO) for MAC motors MAC400-4500 (with 4pin STO connector. R/V option)
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: MAC14x-F, MAC400, MAC402, MAC1500, MAC3000, MAC4500
Important general information:
- The STO function is not approved by any third party laboratory (SIL3/PLe approval pending)
- 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
Notice that MAC402 also can be delivered with STO connector but will never be official TUV approved due to hardware limitations.
For TÜV approved 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 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. "R" mean with 4pin STO connector.
| Part number |
STO connector | TÜV |
| MAC400-Dx-FAGM |
No |
No |
| MAC400-Dx-FRGM |
Yes 4pin |
Pending |
| MAC402-Dx-FRGM |
Yes 4pin |
Not pending |
| MAC1500-Dx-CRAL |
Yes 4pin |
Pending |
| MAC3000-Dx-CRAL |
Yes 4pin |
Pending |
| MAC4500-Dx-CRAL |
Yes 4pin |
Pending |
| MAC3000-Gx-CRAL |
Yes 4pin |
Pending |
| MAC4500-Gx-CRAL |
Yes 4pin |
Pending |
Previously have servomotor had a 3pin STO connector but due to new revision of main board, motors sold from 2022 are equipped with a 4pin STO connector. Old item number was option "S” (3pin) and new is option "R” (4pin). For machines where 3pin "S” version motors are used and need to be updated with 4pin "R” version motors, a 3 to 4pin converter cable item number WI1010-M08M4TF3T.3P is needed.
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-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.
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
JVL A/S Bregnerødvej 127 DK-3460 Birkerød Denmark
Tel: +45 4582 4440 Fax: +45 4582 5550 E-mail: jvl@jvl.dk
Tel: +45 4582 4440 Fax: +45 4582 5550 E-mail: jvl@jvl.dk
