Cut Sheet
Our Emergency Bypass / Shunt Relays are UL924 listed and suitable for shunting
around wall switches in order to turn on emergency lighting in the event of loss
of normal utility power.
Models can also be ordered with various congurations of LED indicators used
for initial wiring verication as well as eld inspection. Certain models can be
ordered equipped with a wireless receiver which responds to signals transmit-
ted by the ESRT remote test transmitter and are used for eld inspection in ac-
cordance with Article 700.3 of the 2011 NEC (National Electric Code). Still others
can be used when the emergency light is needed as part of the normal lighting
scheme and controlled by a single switch (models with ESRBE prex).
UL924 Emergency Bypass / Shunt Relays
• Description
• Multi-coil voltage input
• 10, 15, 20 Amp contact ratings
• Override capabilities for wiring verication and eld inspection
• NEMA 1 enclosure
• Pre wired and prepackaged for convenience
• LED indicator of utility and emergency power
• Mounts easily through ½” knockout or remotely on at surfaces
• Bright yellow color for easy identication
• Panel style for use inside control panels
• UL 924 & California State Fire Marshall
• DPDT congurations
• 5 year warranty
• Made in USA
• Features
When normal power is present, the ESR relay coil is activated and the emergency
panel is fed from normal power. The lighting load can be switched on/o using
an individual wall switch.
When normal power drops out, the ESR coil is deactivated and N/C contact falls
closed. The automatic transfer switch changes over to backup (generator) power,
and the lighting load is illuminated regardless of the position of the wall switch
or controller scheme.
• Operation
Functional Devices, Inc. • p: 800.888.5538 • f: 765.883.7505 • www.functionaldevices.com/lighting-controls • sales@functionaldevices.com