Federal Signal MSL1-120A - MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 120VAC, Amber
Federal Signal

MSL1-120A

Alternate Item Number: msl-microstat

UPC: 782979201694


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Overview

The Federal Signal MSL1-120A MicroStat Incandescent Status Indicator delivers reliable visual status communication for industrial control panels. Designed to operate at 120 VAC, this amber‑lit indicator provides a clear, high‑visibility signal that is easily seen in both daylight and low‑light conditions. The unit is UL and cUL certified, ensuring compliance with stringent safety standards for electrical equipment. With a single‑high (1‑High) configuration, the indicator is ideal for monitoring power, alarm, or process status in a compact footprint. Its rugged, weather‑proof housing protects the incandescent bulb from vibration, dust, and environmental contaminants, making it suitable for harsh industrial environments. The MSL1-120A is easy to install, featuring standard DIN‑rail mounting and a straightforward wiring interface, allowing quick integration into existing control systems. Whether used in building automation, manufacturing lines, or utility substations, this indicator provides a dependable visual cue that helps operators maintain operational awareness and safety. Operators can rely on the MSL1-120A for critical status monitoring in power distribution panels, motor control centers, and HVAC systems. Its amber glow is easily distinguishable from other indicator colors, reducing the chance of misinterpretation. The indicator’s simple wiring harness makes it compatible with a wide range of control panels, while the robust housing resists corrosion and temperature extremes. Federal Signal’s commitment to quality ensures that each unit undergoes rigorous testing, providing long‑term reliability in demanding industrial settings. When integrated into a monitoring dashboard, the indicator’s status can be logged and displayed in real time, enhancing overall system visibility. The MSL1-120A is also energy efficient, drawing minimal current from the 120 VAC supply while delivering a bright amber signal.
  • 120 VAC operating voltage
  • Amber illumination for high visibility
  • UL and cUL certified for safety compliance
  • Single‑High (1‑High) indicator configuration
  • Industrial‑grade, weather‑proof housing

Specifications

0.2
A
120
VAC
7,000
HR
7.8 H x 2.2 W x 2.2 D
IN
Amperage
0.2 A
Amperage Rating
0.2 Amp
Application
Indoor
Brand Name
Federal Signal
Color
Amber
Connection Type
DIN-rail mounting with straightforward wiring interface
Depth
2.2 in
Depth
55.88 mm
Diameter
2.2 in (55.9 mm)
Enclosure
Type 4X
Environmental Conditions
32 to 104 DEG F
Flashing Pattern
Steady/Flashing
Height
7.8 in
Height
198.12 mm
Lamp Life
7,000 HR
Lamp Type
Wedge
Lens Color
Amber
Lens Material
Polycarbonate
Mounting
3/4-Inch NPT Pipe/Surface;3/4-Inch Pipe,Surface
Mounting Type
DIN-Rail
Operating Temperature
32D to +104DF (0D to +40DC)
Operating Voltage
120VAC
Operating Voltage
120
Series
MicroStat
Size
7.8 H x 2.2 W x 2.2 D IN
Size
1-High
Special Features
Optional Sound Module Model MSS
Standard
UL Listed/cUL Listed
Standard
UL,cUL
Sub Brand
MicroStat
Type
status Indicator
Voltage Rating
120VAC
Width
2.2 in
Width
55.88 mm
Package Dimensions (L x W x H)
13 IN x 4.75 IN x 2.75 IN
Package Dimensions (L x W x H)
33.02 cm x 12.065 cm x 6.985 cm
Package Weight (Imperial)
0.700 L
Package Weight (Metric)
0.318 kg
MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 24VDC/AC, Amber

MSL1-024A

MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 24VDC/AC, Amber
MicroStat LED Status Indicator 1 High 120VAC Amber - Available in 24VAC/DC or 120VAC. Factory assembled. Small footprint, only 2.2" diameter (55.9 mm). Surface mount and integrated 3/4-inch NPT pipe mount. Type 4X enclosure (MSL with optional sounder rated NEMA Type 1). Five lens colors: Amber, Blue, Clear, Green and Red. Indoor use only. 50,000 hour LED lamp. Optional sound module (MSS), pipe mount base and flasher. PLC compatible. UL and cUL Listed.

MSL1L-120A

MicroStat LED Status Indicator 1 High 120VAC Amber - Available in 24VAC/DC or 120VAC. Factory assembled. Small footprint, only 2.2" diameter (55.9 mm). Surface mount and integrated 3/4-inch NPT pipe mount. Type 4X enclosure (MSL with optional sounder rated NEMA Type 1). Five lens colors: Amber, Blue, Clear, Green and Red. Indoor use only. 50,000 hour LED lamp. Optional sound module (MSS), pipe mount base and flasher. PLC compatible. UL and cUL Listed.
MicroStat LED Status Indicator 1 High 24VAC/DC Amber - Available in 24VAC/DC or 120VAC. Factory assembled. Small footprint, only 2.2" diameter (55.9 mm). Surface mount and integrated 3/4-inch NPT pipe mount. Type 4X enclosure (MSL with optional sounder rated NEMA Type 1). Five lens colors: Amber, Blue, Clear, Green and Red. Indoor use only. 50,000 hour LED lamp. Optional sound module (MSS), pipe mount base and flasher. PLC compatible. UL and cUL Listed.

MSL1L-024A

MicroStat LED Status Indicator 1 High 24VAC/DC Amber - Available in 24VAC/DC or 120VAC. Factory assembled. Small footprint, only 2.2" diameter (55.9 mm). Surface mount and integrated 3/4-inch NPT pipe mount. Type 4X enclosure (MSL with optional sounder rated NEMA Type 1). Five lens colors: Amber, Blue, Clear, Green and Red. Indoor use only. 50,000 hour LED lamp. Optional sound module (MSS), pipe mount base and flasher. PLC compatible. UL and cUL Listed.
MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 120VAC, Blue

MSL1-120B

MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 120VAC, Blue
MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 120VAC, Green

MSL1-120G

MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 120VAC, Green
MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 120VAC, Red

MSL1-120R

MicroStat Incandescent Status Indicator, 1-High, UL and cUL, 120VAC, Red
MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Clear, Green

MSL2-120CG

MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Clear, Green
MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Amber, Blue

MSL2-120AB

MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Amber, Blue
MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Blue, Red

MSL2-120BR

MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Blue, Red
MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Clear, Red

MSL2-120CR

MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Clear, Red
MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Amber, Red

MSL2-120AR

MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Amber, Red
MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Amber, Green

MSL2-120AG

MicroStat Incandescent Status Indicator, 2-High, UL and cUL, 120VAC, Amber, Green

Frequently Asked Questions

What are the available operating voltages for the MicroStat?

The MicroStat is available in 24VAC/DC or 120VAC operating voltages.

What is the enclosure rating of the MicroStat status indicator?

The MicroStat is a Type 4X status indicator. With an optional sounder, it is rated Type 1.

How can the MicroStat status indicator be mounted?

The MicroStat can be surface mounted or integrated with a 3/4-inch NPT pipe mount.

Is the MicroStat status indicator suitable for outdoor use?

No, the MicroStat status indicator is designed for indoor use only.

Is the MicroStat status indicator compatible with PLCs?

Yes, the MicroStat is PLC compatible and designed to work with PLC outputs, including Triacs.

What is the sound level of the optional sound module?

The optional sound module produces 93-95 dBa at 1 meter (83-85 dBa at 10 feet).

What is the operating temperature range for the MicroStat?

The MicroStat operates within a temperature range of 32°F to 104°F (0°C to 40°C).

What is the typical lamp life for the MicroStat?

The standard wedge-type lamp (#655) has a lamp life of 7,000 hours.

What type of lamp does the MicroStat use?

The MicroStat uses a rugged, vibration-resistant, thick-filament wedge-type lamp (#655).

Is an LED lamp option available for the MicroStat?

Yes, an optional 50,000-hour LED lamp (MSLED Lamp) is available.

How to Install the MSL1-120A MicroStat™ Status Indicator

This guide provides step-by-step instructions for installing and configuring the MSL1-120A MicroStat™ Status Indicator, ensuring proper mounting, wiring, and initial setup.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors, Gasket

  1. Unpack and Inspect the Equipment

    Carefully unpack the MSL1-120A and inspect it for any damage that may have occurred during transit. If damaged, do not install and file a claim with the carrier.

  2. Mount the Base

    Remove the colored lenses by twisting the bottom lens counter-clockwise until it unlocks. Lift the lens off and remove the two Phillips head #6 screws to disassemble the sleeve from the base. Mount the base onto a 3/4" NPT pipe or a flat surface using the appropriate screws, ensuring it is securely fastened without over-tightening.

  3. Make Electrical Connections

    Feed the control wires through the NPT opening in the base. Connect the wires to the female terminal block plug, ensuring to match the terminals labeled '1' through '5' to their corresponding lamp positions. Reconnect the terminal block to the printed circuit board.

  4. Reassemble the Unit

    Ensure that O-rings are in place on each module. Reattach the sleeve to the base and secure it with the screws removed earlier. Reassemble the colored lenses in the desired order, ensuring each lens is locked into place.

  5. Test the Installation

    Before applying power, double-check all connections and ensure that the unit is securely mounted. Once verified, apply power to the system and test the MicroStat™ to ensure it operates correctly.

Frequently Asked Questions about Federal Signal

What certifications and standards do Federal Signal products comply with?

Federal Signal products are certified across multiple international standards, including UL (Underwriters Laboratories) in the USA, CSA (Canadian Standards Association), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia and New Zealand). Their products meet rigorous safety and performance standards for industrial environments, with specific compliance in electrical equipment enclosures, functional safety, and environmental protection ratings.

What is Federal Signal's warranty policy?

Federal Signal offers a comprehensive limited warranty covering most products for 1-5 years from the date of delivery, with specific terms varying by product category. Mechanical sirens, beacons, speakers, and sounders typically receive 5-year parts and labor coverage, while electronic sirens and controllers generally have 2-year warranties. All warranties require return to the factory for service, and on-site services are not included. Certain components like domes, lenses, lamps, and batteries are specifically excluded from warranty coverage.

What industries and applications are Federal Signal products used for?

Federal Signal products are used across multiple critical industrial and municipal sectors for notification, communication, and safety systems. Their product lines cover essential applications including fire alarm systems, public address and telephony, outdoor warning systems, visual and audible signals, and emergency communication networks. Key industries served include manufacturing, municipal emergency services, industrial facilities, and infrastructure environments where clear, reliable communication and safety signaling are paramount.

What technical support does Federal Signal offer?

Federal Signal offers comprehensive technical support through their dedicated [email protected] email and direct phone line at +1 708.534.4756. Their support covers a wide range of notification and communication solutions, including technical assistance for products in public address, telephony, fire alarm, visual and audible signals, outdoor warning systems, and intercoms.

What are the main product lines offered by Federal Signal?

Federal Signal offers comprehensive notification and communication solutions across multiple product lines, including Visual Signals, Audible Signals, Telephony, Intercoms, Fire Alarm, Outdoor Warning Systems, Public Address, and Initiating Systems. Their product range is designed to provide clear communications and critical process notifications that enhance safety and compliance in industrial and public environments.

What are the key features of Federal Signal products?

Federal Signal products are comprehensive notification solutions designed to enhance safety and communication across industrial environments. Their key features include visual and audible signals, fire alarm systems, outdoor warning systems, public address capabilities, telephony, and intercoms. These products provide critical process notifications, ensure safety compliance, and offer advanced technologies like secure encrypted communication, cloud-based control systems, and customizable emergency response interfaces.

What environmental ratings do Federal Signal products have?

Federal Signal products offer robust environmental ratings across multiple standards, including UL 508A, CSA, NEMA, and IEC 60529. Their enclosures are rated for Type 1, 2, 3, 4, 4X, 12, and 13 environments, with IP66 protection, and can operate in temperatures ranging from -40°F to 266°F. These ratings ensure superior protection against dust, water, corrosion, and extreme conditions for indoor and outdoor industrial applications.

What accessories are available for Federal Signal products?

Federal Signal offers multiple accessories for their signaling products, including coupling kits, cable entry adapters, indicator rings, legend plates, and mounting brackets. Key accessories include E-Box endcap kits with M20 and M25 openings, U-Brackets for dual configurations, and color-coded indicator rings in black, blue, green, magenta, red, and yellow. Additional options like adapters for NPT connections and specialized mounting hardware are also available for their Global Series signaling platforms.

What communication protocols do Federal Signal products support?

Federal Signal supports multiple industrial communication protocols including PROFIBUS DP, PROFINET, EtherNet/IP, CANopen, and Modbus RTU. These protocols enable flexible network integration across various industrial automation environments, supporting both traditional fieldbuses and modern Ethernet-based communication standards.

How are Federal Signal products typically installed?

Federal Signal products are typically installed using professional mounting configurations that include wall brackets, base stations, and specialized mounting hardware. Depending on the specific product line—such as outdoor warning systems, visual signals, or audible signals—installation involves precise mounting options like wall-mount antenna brackets, base station radio packages, and modular component assemblies. Each product configuration includes specific mounting accessories like endcaps, adapters, and terminal blocks to ensure secure and compliant installation in industrial and safety-critical environments.