Electric Fail-Safe Device Installation, Operation & Maintenance Manual
PRODUCT DESCRIPTION:
The Indelac Controls Electric Fail-Safe Device provides battery backup power to your actuator in the
unlikely event that the Factory or Facility Mains Power should go down. These devices are designed to
seamlessly convert 12vdc, 24vdc or 36vdc battery standby power to 115vac or 230vac to power your
actuator. The battery power supplies an internal Power Inverter that converts the DC to AC to run the
actuator to the user wired Fail Position when the Mains Power fails. When normal Mains Power is present,
it powers the actuator and provides a maintenance charge to the backup battery. When the Mains Power
fails or drops out momentarily, the Power Inverter will automatically switch over to battery power and
supply a PWM sine wave AC to the actuator. When the Mains Power comes back online, the Power
Inverter will immediately transfer Mains Power back to the actuator and proceed to re-charge and maintain
the battery.
The Electric Fail-Safe Devices come in a variety of styles and sizes to fit the smallest to largest of
actuators. Indelac provides these Devices in NEMA 4, NEMA 4X or NEMA 7 enclosures to provide 5, 7,
10, 15 or 30 Amps of output power. Each Fail-Safe Device is designed to supply the actuator’s continuous
Full Load Ampere draw to drive the Actuator to the Fail-Safe position. The Power Inverter can also supply
the additional current required for start-up / Locked Rotor Ampere Torque for up to the initial 1-2 second
turn on.
The internal Power Inverter has a built in 3 Stage Battery Charger for the on-board Sealed Lead Acid
Battery. Depending on the size & age of the battery used in each Fail-Safe Device, battery charge time
can vary from hours to overnight for a full charge.
Optional features, such as Emergency Disconnect Switches, Internal Heaters and Internal Relays to run
more than 1 actuator to Fail Position may be ordered –Consult the Factory for available SPECIAL
Options.
5 Amp NEMA 4X Version Shown
