FA232007
28 September 2021
Issue:What safety functions exists in the ATV32 and ATV71?
Product Line:ATV71 and ATV32 series drives
Environment:All models, All serial numbers.
Cause:Customer usually uses ATV32 drives and makes use of the integrated safety functions. They now have an application that requires a drive larger than 20HP. The largest ATV32 is 20HP so customer is considering an ATV71 instead but needs to verity the safety functions of the ATV71 meet the requirements of their installation.
Resolution:
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ATV32 has better features concerning safety - it can perform:
- STO (Safe Torque Off, stopping category 0 and 1)
- SS1 (Safe Stop 1),
- SLS (Safely-Limited Speed).
ATV71 can do STO, only.
Particularly, concerning STO, ATV32 is also better than ATV71:
ATV32 can do some STO's without any external safety module (like Preventa):
- STO SIL1 stopping category 0 on STO input, ( EN 954-1 category 2, IEC/EN 61508 , IEC/EN 60204-1)
- STO SIL2 stopping category 0 on STO input, ( EN 954-1 category 2, IEC/EN 61508 , IEC/EN 60204-1)
- STO SIL3 stopping category 0 on STO and LI3 inputs, ( EN 954-1 category 2, IEC/EN 61508 , IEC/EN 60204-1).
(stopping category 1 needs an external safety module)
ATV71 can do only the following STO's but always with external safety module:
- STO SIL2 stopping category 0 on PWR input, ( EN 954-1 category 2, IEC/EN 61508 , IEC/EN 60204-1),
- STO SIL2 stopping category 1 on PWR input, ( EN 954-1 category 2, IEC/EN 61508 , IEC/EN 60204-1)
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