What is needed to keep the EL device retracted all day?

To keep the Von Duprin electric latch retraction EL or QELA exit device dogged (retracted) all day, have your access control, Key pad, key switch, fire alarm contact or any other signals to provide normally closed contact signal to the option board of the PS900 series power supply between SC and I terminal.
  •  As long as the contact is activated, the EL or QELA device will remain retracted.
  •  900-2RS option board is required with PS900 series power supply to activate the QEL device.
  •  900-2RS or 900-4RL board is required with PS914 power supply to activate the EL device.
  • There will not be any problem to keep the EL or QELA devices in the retracted mode for long periods time.
  • Wiring information can be located at PS900 x 900-2Q wiring   PS914 x 900-2RS  PS914 x 900-4RL (4TD

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