Details: Command Access CRU Current Reduction Unit

The CRU3 (current reduction module) is designed to reduce the holding current in operating conditions where the solenoid driven locking hardware remains energized for a long period of time. These typically include fail-safe conditions or fail-secure conditions on an "unlock" cycle. Often when solenoid locksets are energized for long periods of time the locks become very warm to the touch due to overheating the solenoid. This can occur due to a power supply operating at a higher voltage than the acceptable voltage operating range of the solenoid. When this occurs the life of the solenoid is likely shortened by years and operating efficiency of the lock is reduced. With the addition of the CRU3 the locking device operates cool and the energy consumption is greatly reduced