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Battery Backup

Weight 0.02 lbs


Degree of protection IEC/EN
Degree of protection NEMA/UL
Degree of Protection
Actuator family
Mechanical Accessory
Product family
Electrical Accessory
NA Product type
ZE - Accessory electronic
Structure Level1
Structure Level2
Butterfly Valve/Actuators (Retrofit)
Ambient temperature
-5...113°F [-15...45°C]
Non-operating temperature
-5...113°F [-15...45°C]
Ambient humidity
up to 95%
maintenance free
Nominal voltage
AC 120 V
Nominal voltage AC
120 V
Nominal voltage frequency
50/60 Hz
Housing material
Warranty Logo
Family Series
SY Series
Noise Level (Fail-Safe)
<45 dB (A) 
Power Supply
120 VAC, 50/60 Hz
Input Frequency
50/60 Hz +/- 1 Hz (auto sensing)
Nominal Output Voltage
120 VAC, 50/60 Hz
Power capacity
350 VA / 210 W
Battery Typical Backup Time at Half-Load
5.6 min
APC Backup Module
cUL listed, FCC Part 15 Class B, FCC part 68, NOM, UL1778, UL497A, UL498
Overload Protection
Electrical Connection
Terminal strip
Stainless Steel screws
Rubberized PVC
Typically, applications requiring fail-safe operation of actuated devices have had to rely on either the limited power of mechanical spring return actuators, or use costly high pressure pneumatic devices to provide fail-safe positioning. Model EXT-NSV series computer-grade UPS back-up systems designed for use with SY Series electric quarter-turn actuators provides the power necessary to drive these actuators to a field selectable fail-safe position. The system consists of a NEMA 4X steel key lock hinged door controls cabinet which houses the logic switching, all field wiring terminal points and a computer-grade back-up system. The back-up system is a component-level device which utilizes a replaceable spill-proof battery pack that can be readily purchased at most office-supply centers.
The back-up system is wired in series between the mains power and the actuator. Under normal operation, power supplied to the EXT-NSV will illuminate the green “LINE IN” indicator light, and provide charging voltage to the battery system. While under main power, the position of the “FAIL POSITION SELECT” switch is irrelevant. Power is supplied through the interface cabinet and the actuator heater is enabled. No current is being drawn from the battery system during this mode of operation. Optional indicator lights can be wired to show actuator end of travel status. These lamps are active as long as the battery system is running or Main power is present AND the actuator is receiving a signal to drive to the full OPEN or CLOSED position. Optional STATUS contacts can be used for remote health indicators of LINE voltage coming into the EXT-NSV and if the Battery System is operating. When the mains power is lost, charging power is no longer supplied to the battery system. The green “LINE IN” indicator light is turned off, and the battery system automatically generates modified-sine wave line voltage to provide power for the actuator. The blue “BAT CHARGING” indicator light is turned off, and the yellow “B/U POWER” indicator light is turned on. The “FAIL POSITION SELECT” switch becomes active, and depending on its position, drives the actuator either fully open or fully closed. During this mode of operation, the position of any field interface switching is irrelevant. The battery system will provide ample power to drive the actuator more than 5 full torque cycles. However, once the actuator reaches its end-of-travel limit switch, power drain from the back-up system is reduced to the requirements of the yellow “B/U POWER” indicator light. After 15 minutes, the battery system turns itself off and waits for the mains power to return. The design provides automatic locking of the actuator position after the battery system shuts down. Normal operation is resumed when mains power returns.

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