Cut Sheet

Functional Devices, Inc. • p: 800.888.5538 • f: 765.883.7505 • www.functionaldevices.com/lighting-controls • [e-mail]
# Relays & Contact Type:
Expected Relay Life:
Operating Temperature:
Operate Time:
Relay Status:
Emergency Power Present:
Dimensions:
Wires:
Approvals:
Gold Flash:
One (1) SPST-NC Continuous Duty Coil
10 million cycles minimum mechanical
-30 to 140° F
50 ms
Red LED On = Activated
Yellow LED On = Transfer Power Present
4.60˝ x 1.20˝ x 1.70˝
16.00˝, 600V Rated
UL Listed, UL924, C-UL, CE
No
Contact Ratings:
10 Amp Magnetic Ballast @ 277 Vac (N/C)
2 Amp Electronic Ballast @ 120 Vac (N/C)
Coil Current:
150 mA @ 277 Vac
Coil Voltage Input:
277 Vac ; 50-60 Hz
Blk
Utility 277 Vac
Prp
Switched Utility
277 Vac
Red
Utility Neutral
Blu
Emergency Hot
to Load
Yel
Emergency Hot
Gry
Emergency Neutral
ESRBE277C
Enclosed Relay 10 Amp SPST-NC with 277 Vac Coil and Switched Utility Detection
Made in USA
Meets
“Buy American”
of ARRA 2009
Specications
UL924 Emergency Bypass / Shunt Relay
• Ballast Size Housing
Initial Wiring Verication
1. Turn OFF Normal Power, Transfer Power, and Wall Switch.
2. Wire relay according to wiring diagram.
3. Energize Normal Power. Red LED should illuminate.
4. Energize Transfer Power. Yellow LED should illuminate.
5. Turn on Wall Switch. Red LED should turn OFF.
Field Inspection
1. Ensure Normal Power and Transfer Power are energized.
2. Turn OFF Wall Switch. Light will turn OFF.
3. Both Red LED and Yellow LED will be illuminated.
4. Turn OFF Normal Power. Red LED will be OFF. Yellow LED should be
illuminated. Emergency Light will illuminate.
Notes:
• Control input on purple wire detects wall switch,
allowing emergency light to be used as normal lighting.
• Smaller design to t inside ballast housing of
uorescent light xture.
Use of Normal Light as
Emergency Light
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.
When the Emergency Light is needed as a
Normal Light as well, this application can be
applied using this specic relay.
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 the existing 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 Emergency
Light remains illuminated, regardless of the
position of the existing wall switch, while the
Normal Lighting is o.
Normal Neutral
Switched Hot
Transfer
Switch
Emergency
Panel
Switched Hot
Normal Hot
Normal Neutral
Normal Hot
Normal Neutral
Normal Hot
Normal Neutral
Backup Hot
Backup Neutral
Emergency Hot
Emergency Neutral
To
Emergency Light
Hot
Normal Lighting Emergency Light
Purple Wire
Yellow
Wire
Grey
Wire
Blue Wire
Normal Power
277 Vac
ESRBE277C
Backup Power
277 Vac
Black Wire
Red Wire