Why Choose the Finder 99.01.0.024.50 Red LED Relay Indication Module?
The Finder 99.01.0.024.50 is a compact red LED relay coil indication module designed for industrial automation, electrical control panels and compatible Finder relay socket installations. Part of the Finder 99 Series, this plug-in accessory provides a clear visual indication when the associated relay coil is energised, helping engineers and maintenance technicians monitor control circuit operation.
Featuring a 6–24 V AC/DC operating voltage range, the Finder 99.01.0.024.50 is suitable for compatible low-voltage relay control circuits. Its integrated red LED indicator illuminates when the appropriate voltage is applied across the relay coil circuit, providing a convenient visual reference during equipment operation, commissioning and fault diagnosis.
Designed to be fitted into compatible Finder relay sockets, this module provides a straightforward way to add coil status indication without installing a separate panel-mounted indicator lamp. Its compact construction makes it particularly useful in control cabinets containing multiple relay interfaces where clear status visibility and efficient use of space are important.
The Finder 99.01.0.024.50 is an LED indication-only module. It should not be confused with other Finder 99 Series accessories that incorporate additional diode, varistor or RC suppression circuitry. Where electromagnetic interference suppression is required, an appropriate combined indication and suppression module should be selected separately.
Key Advantages
- Red LED coil indication provides a visible indication of relay coil energisation.
- 6–24 V AC/DC operating range supports compatible low-voltage relay circuits.
- Plug-in accessory design enables convenient installation in suitable Finder relay sockets.
- Improved control panel visibility helps technicians identify energised relay circuits.
- Useful for fault diagnosis when investigating control signals and relay operation.
- Compact construction avoids the need for a separate panel-mounted indicator in many applications.
- Suitable for AC and DC control voltages within the specified operating range.
- Red illumination provides a clear visual status reference.
- Compatible with selected Finder relay socket arrangements designed to accept 99.01 modules.
- Simple maintenance through the modular relay socket accessory system.
- Suitable for industrial automation and machinery control.
- RoHS-compliant product for modern electrical equipment specifications.
Key Features
- Finder 99 Series relay accessory.
- Manufacturer part number 99.01.0.024.50.
- Red LED indication module.
- 6–24 V AC/DC operating voltage range.
- Relay coil energisation indication.
- Suitable for compatible AC relay coil circuits.
- Suitable for compatible DC relay coil circuits.
- DC polarity requirement: positive supply connected to terminal A1.
- Plug-in installation with suitable Finder relay sockets.
- Compact relay socket accessory construction.
- Indication-only functionality without an additional dedicated suppression network.
- Designed for industrial electrical control applications.
- Suitable for control panel commissioning and maintenance.
- Useful for identifying energised relay coils.
- RoHS compliant.
Technical Specifications
- Manufacturer: Finder
- Product series: 99 Series
- Part number: 99.01.0.024.50
- Product type: Relay coil indication module
- Accessory category: Plug-in relay socket accessory
- Indication type: LED
- LED colour: Red
- Operating voltage range: 6–24 V AC/DC
- Supply compatibility: AC and DC
- DC polarity: Positive connected to terminal A1
- Primary function: Visual indication of relay coil energisation
- Suppression functionality: No separate dedicated suppression circuit specified for this LED-only version
- Installation: Plug-in connection to a compatible Finder relay socket
- Compatible equipment: Selected Finder relay sockets supporting 99.01 modules
- Relay included: No
- Relay socket included: No
- Application: Industrial relay coil status indication
- RoHS compliance: Yes
- RoHS phthalates compliance: Yes
- REACH SVHC status: No SVHC reported in distributor compliance information dated 4 February 2026
- EAN / GTIN: 8012823104416
Clear Red LED Indication for Relay Coil Monitoring
The Finder 99.01.0.024.50 is designed to provide a straightforward visual indication of the electrical condition of a relay coil circuit. When the appropriate operating voltage is applied, the integrated red LED illuminates, helping technicians identify which relay control circuits are energised.
In industrial control panels, multiple relays may be installed close together, making it difficult to determine their electrical status by visual inspection alone. An LED indication module provides a convenient way to identify an energised coil without immediately connecting external test equipment.
This can be particularly valuable during machine commissioning, PLC output testing, maintenance inspections and electrical troubleshooting. For example, a technician investigating a control sequence can check whether a relay coil is receiving an operating signal.
It is important to distinguish coil indication from confirmation of the relay's actual contact position. An illuminated LED indicates that the associated coil circuit is energised; it does not independently verify that the relay contacts have changed state or that the connected load is operating correctly.
For this reason, the Finder 99.01.0.024.50 should be used as a useful diagnostic aid rather than as a substitute for electrical testing, contact feedback or safety monitoring.
6–24 V AC/DC Operation for Low-Voltage Control Circuits
The module is designed for an operating voltage range of 6–24 V AC/DC, making it suitable for a variety of compatible low-voltage relay installations.
Its ability to operate with both alternating current and direct current provides flexibility for electrical control systems using different coil supply arrangements. However, the module must always be matched to the actual voltage applied to the relay coil.
When the module is used with a DC supply, Finder specifies that the positive connection must be made to terminal A1. Correct polarity is important for proper operation and should be checked against the relay socket wiring diagram before energising the circuit.
The 99.01.0.024.50 is not intended for direct connection to 110 V or 230 V control supplies. For higher-voltage applications, a different Finder 99 Series module with the appropriate operating range must be selected.
Engineers should verify the coil voltage, socket compatibility and wiring arrangement before installing the module, particularly when replacing an existing relay accessory.
LED Indication Compared with Coil Suppression Modules
The Finder 99 Series includes several types of relay accessories, each designed for a different electrical function. Some modules provide only visual indication, while others incorporate components intended to reduce electrical transients associated with relay coil switching.
The Finder 99.01.0.024.50 is specifically a red LED indication module. Its purpose is to show when the relay coil circuit is energised.
By comparison, other Finder 99.01 variants may include diodes, varistors or RC suppression networks. These components can be used to manage switching transients and electromagnetic interference in suitable control circuits.
For example, the Finder 99.01.0.024.08 is a different product variant combining red LED indication with a varistor for an appropriate low-voltage AC/DC application. The Finder 99.01.9.024.90 combines LED indication with diode protection for suitable DC circuits.
These modules should not be treated as interchangeable without checking the supply voltage, polarity, relay coil characteristics and the required suppression behaviour. The correct accessory depends on the electrical design of the complete control system.
Convenient Installation in Compatible Finder Relay Sockets
The Finder 99.01.0.024.50 is intended for use with selected Finder relay sockets designed to accommodate 99.01 accessories. The module is fitted into the appropriate accessory connection position of the compatible socket.
This modular approach allows the indication function to be incorporated into the relay installation without requiring a separate indicator lamp and associated panel wiring.
Before installation, the equipment supply should be safely isolated and the socket's accessory compatibility checked. The module should be inserted according to Finder's installation instructions and the electrical connection diagram for the relevant socket.
For DC applications, the positive supply connection to A1 must be observed. The operating voltage must also remain within the module's specified 6–24 V AC/DC range.
The module is an accessory rather than a complete relay assembly. A suitable relay and compatible socket are required separately to create a functional switching installation.
Typical Applications
- Industrial automation control panels.
- Relay coil status indication.
- PLC output relay interface assemblies.
- Machinery control and auxiliary switching circuits.
- Electrical cabinet commissioning.
- Industrial maintenance and fault diagnosis.
- Low-voltage AC relay control circuits.
- Low-voltage DC relay control circuits.
- Manufacturing and production equipment.
- Conveyor and material handling systems.
- Industrial process control installations.
- Building management and HVAC control systems.
- Equipment status monitoring.
- OEM electrical equipment manufacturing.
- Replacement of compatible Finder red LED indication modules.
