Why Choose the Finder 99.80.9.220.99 Green LED and Diode Suppression Module?
The Finder 99.80.9.220.99 is a compact green LED indication and flyback diode suppression module from the Finder 99 Series, designed for compatible relay sockets operating with 110–220 V DC control supplies. Combining visual relay coil indication with inductive transient suppression, this plug-in accessory provides a practical solution for industrial automation, electrical control panels and machinery control systems.
When the appropriate voltage is applied to a compatible relay coil, the module's green LED illuminates to provide a visible indication of the control supply. Its integrated flyback diode helps suppress the voltage transient generated when the relay coil is de-energised, reducing electrical stress on associated control circuit components.
The Finder 99.80.9.220.99 features a blue housing and standard DC polarity, with positive connected to terminal A1. Its plug-in design allows straightforward integration into compatible Finder relay sockets without requiring separately wired LED indication and suppression components.
Key Advantages
- Dual-function module: Combines green LED coil indication and flyback diode suppression.
- 110–220 V DC operating range: Designed for compatible higher-voltage DC relay control circuits.
- Green LED indication: Provides clear visual feedback when relay coil voltage is present.
- Integrated flyback diode: Helps limit inductive voltage transients when the relay coil is switched off.
- Standard polarity: Positive DC supply connected to terminal A1.
- Plug-in installation: Enables convenient fitting into compatible Finder relay sockets.
- Compact blue housing: Supports organised electrical control panel construction.
- Reduced external wiring: Combines indication and suppression within one accessory.
- Control circuit protection: Helps reduce voltage stress on suitable electronic switching devices.
- Convenient troubleshooting: LED indication assists with commissioning, inspection and maintenance.
- Modular design: Supports straightforward accessory selection and replacement.
- Finder 99 Series compatibility: Designed for selected relay sockets accepting 99.80 modules.
Key Features
- Manufacturer: Finder.
- Series: 99 Series.
- Module family: 99.80.
- Model: 99.80.9.220.99.
- Product type: Relay coil indication and EMC suppression module.
- Indication technology: LED.
- LED colour: Green.
- Operating voltage: 110–220 V DC.
- Supply type: Direct current (DC).
- Suppression component: Flyback diode.
- Polarity: Standard polarity, positive to A1.
- Housing colour: Blue.
- Installation: Plug-in connection to compatible relay sockets.
- Function: Visual relay coil indication and inductive transient suppression.
- Designed for compatible Finder electromechanical relay assemblies.
- Suitable for industrial automation and electrical control applications.
Technical Specifications
- Manufacturer: Finder
- Series: 99 Series
- Module family: 99.80
- Manufacturer part number: 99.80.9.220.99
- EAN / GTIN: 8012823105369
- Product category: Relay indication and EMC suppression accessories
- Product type: Plug-in LED and diode module
- Operating voltage range: 110–220 V DC
- Supply voltage type: DC only
- LED colour: Green
- Indication function: Relay coil voltage indication
- Suppression technology: Flyback diode
- Suppression function: Limitation of relay coil inductive switching transients
- Polarity: Standard polarity, positive to terminal A1
- Housing colour: Blue
- Electrical connection: Plug-in
- Mounting arrangement: Compatible relay socket accessory receptacle
- Compatible socket family: Selected Finder sockets accepting 99.80 modules
- Compatible socket examples: Finder 95.55.3, 95.83.1, 95.85.1, 97.51.3 and 97.52.3, subject to individual socket compatibility
- Application: DC relay coil indication and inductive transient suppression
- Installation environment: Suitable industrial electrical control panels and enclosures
Reliable DC Relay Coil Indication and Inductive Transient Suppression
The Finder 99.80.9.220.99 provides two essential relay accessory functions within a single plug-in module. Its green LED indicates the presence of the appropriate DC control voltage, while its integrated flyback diode helps control the inductive voltage transient produced when the relay coil is switched off.
Electromechanical relay coils store energy in a magnetic field during operation. When the coil supply is interrupted, this stored energy can produce a high reverse voltage. The module's flyback diode provides a discharge path for the coil current, helping reduce voltage spikes that could otherwise place stress on suitable electronic control outputs and switching devices.
The module is specifically designed for 110–220 V DC applications and requires correct polarity. The positive DC supply must be connected to terminal A1. Incorrect polarity can cause excessive current through the diode and potentially damage the module or connected equipment.
Flyback diode suppression can increase relay release time because the coil current decays more gradually than in an unsuppressed circuit. Where rapid contact release is essential, the effect of the suppression method should be considered during electrical system design.
The green LED provides convenient visual confirmation of the coil supply but does not independently verify that the relay contacts have changed state. Correct relay, socket and accessory selection remains essential for dependable operation.
Typical Applications
- 110–220 V DC industrial relay control circuits.
- Relay coil indication and status monitoring.
- Inductive transient suppression in DC relay assemblies.
- Industrial automation control panels.
- PLC-controlled relay interface circuits.
- Industrial machinery and auxiliary switching systems.
- Electrical signalling and control equipment.
- Industrial process automation installations.
- Manufacturing and production machinery.
- Power distribution auxiliary control circuits.
- Building automation and electrical control systems.
- Electrical commissioning and fault diagnosis.
- OEM electrical panel manufacturing.
- Maintenance of compatible Finder relay assemblies.
