Federal Signal Corporation Vitalite 121SLED Installation And Maintenance Instructions Manual Download Page 1

Model 121SLED and 121SLED-N

Vitalite

®

 LED Rotating Light

Limited Warranty: 

This product’s limited warranty  

can be found at www.fedsig.com/SSG-Warranty.

Safety Messages to Installers and Users 

Products should be installed to code by a licensed electrician 

and follow all safety instructions. Failure to do so may result in property damage, serious injury, or death.
•  Read and understand instructions before installing or operating equipment.
•  To avoid electrical shock hazards, do not connect wires when power is applied.
•  To be an effective warning device, this product produces bright light that could be hazardous to eyesight. 

The possibility exists that rapid flashing lights could induce photosensitive epilepsy. Do not stare directly at 

the light.

Overview: 

Models 121SLED and 121SLED-N rotating LED warning lights are designed for mounting on a flat 

(horizontal or vertical) surface or on a 1/2” NPT threaded pipe. Units are available in 120VAC 50/60 Hz.  

Certifications and Ratings:

•  UL and cUL Listed
•  Type 4X, IP66 enclosure. Indoor/Outdoor Use
•  IP69K Compliant
•  Model 121SLED-N is NSF Certified 

(dome-up)

 for  

Splash Zones and Non-food Zones to  

NSF/ANSI 2: Food Equipment

•  Electrical ratings: 120VAC 50/60Hz, 0.075A
•  Certified operating temperature:  

-40°F to 150°F (-40°C to 66°C)

Installation:

Unpacking the Device: 

After unpacking the device, examine it 

for damage and verify parts. Unit comes with: (1) 121SLED or 

121SLED-N assembled unit with flying leads, (1) panel mount 

gasket, and (3) # 8-32 panel mounting tapping screws. If a part 

is missing or damaged do not install. Contact Federal Signal 

Customer Support at  

+1 708-534-4756 or [email protected].

Electrical Connections 

To avoid electrical shock, do not 

connect wires when circuits are energized. Use 18AWG field 

wiring or larger.

•  120VAC 50/60Hz Models  –  

Connect the line (L or L1) 

power source lead to the black wire and connect the neutral 

(N or L2) power source lead to the white wire. Connect 

ground to the green/yellow wire if required.

Mounting the device: 

Units come standard to mount on a 

flat (horizontal or vertical) surface or a 1/2" NPT pipe. Model 

121SLED-N (NSF Certified) must be mounted in a dome up position to resist water and debris accumulation 

and maintain the NSF Certification. Wall or corner mounting accessories are sold separately. 

•  Pipe Mounting  –  

On a 1/2" NPT Pipe, feed wires through pipe and turn clockwise to tighten. 

Recommended tightening torque is 5-ft-lbs (6.8 N-m).

•  Surface/Panel Mounting  –  

Using provided gasket as template, mark three mounting holes and center 

hole for wiring. Drill or punch 3/16" (4.8mm) diameter holes for mounting and a 1" (25.4mm) for wiring. Set 

base on gasket, feed wires through center, and attach to the mounting surface using provided #8 tapping 

screws from the underside.

5.12"/ 130 mm

6.26"/ 159 mm

1/2" NPT 

Pipe Mount

LED Lamp

Elliptical Dome
(12" Curvature
 Radius)

Screw

in base

Installation and Maintenance Instructions

Junction box 
(not supplied)

1/2" conduit 
(not supplied)

121SLED

Wiring 
Black to Line 

(L or L1)
White to Neutral 

(N or L2)
Green/yellow to Earth 

(Ground)
Wire nuts not supplied.

Wiring

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