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E 71 Backup Voltage

E 71 Hilfsspannung

TA Roloff actuators can be made fail safe with the E71 auxiliary power unit. This will ensure that actuators in operation will move to the required safety positions (end positions “OPEN” or “CLOSED”) in the event of a power failure. The energy from integrated accumulators is used for this purpose. The integration of the accumulators into the actuator also enables the valve to move to the safety position, if the cable connection is destroyed.  


  • Automatic shifting into the safety position
  • Fail-safe mechanism for every valve type
  • Simple electrical control
  • Integrated back up voltage