MEB-LD-230AC Festo Illuminating Seal

Technical Overview

The Festo MEB-LD-230AC is an illuminating seal designed for use with solenoid valves, providing an integrated LED switching position indicator for clear operational status. This square-design component is compatible with Type C electrical connections to DIN EN 175301-803 (MSEB) and operates at a nominal AC voltage of 230 V. Constructed from transparent TPE-U(PU) material, it ensures IP65 protection and high durability in industrial environments, with a wide operating temperature range and immunity to surges up to 2.5 kV.

Key Features

Switching position indicator LED
Square design compatible with Type C DIN EN 175301-803
IP65 degree of protection
Transparent TPE-U(PU) housing
Surge immunity up to 2.5 kV
Suitable for high-temperature environments up to 85 °C

Technical Specification Matrix

Parameter	Value
Switching position indicator	LED
Type of mounting	On solenoid valve via M2.5 central screw
Product weight	0.6 g
Electrical connection	Type C To DIN EN 175301-803 Square design MSEB
Nominal operating voltage AC	230 V
Immunity to surge	2.5 kV
Protective conductor connection	Available
Nominal power illuminating seal	0.33 W
Permissible voltage fluctuations	+/- 10 %
Degree of protection	IP65
Ambient temperature	-25 °C ... 85 °C
CE mark (see declaration of conformity)	To EU Low Voltage Directive
UKCA marking (see declaration of conformity)	To UK regulations for electrical equipment
LABS (PWIS) conformity	VDMA24364-B2-L
Pollution degree	3
Material housing	TPE-U(PU)
Colour	Transparent

Industrial Applications

1. Pneumatic Manifold Diagnostics in Food Packaging Conveyors

Utilizing the Festo MEB-LD-230AC illuminating seal on pneumatic solenoid valves to provide immediate visual feedback of actuation states on a high-speed food packaging line.

Problem Solved

Reduces machine downtime during faults by allowing maintenance teams to instantly visually verify if 230V AC control signals are reaching the solenoid valves in a wet or dusty environment, bypassing the need for manual multi-meter probing.

LED switching position indicatorIP65230 V ACType C DIN EN 175301-803

2. Harsh Environment Valve Monitoring in Fluid Processing

Deploying the transparent TPE-U(PU) illuminating seal in fluid routing systems subjected to extreme ambient temperatures and potential electrical surges.

Problem Solved

Provides reliable sealing and switching indication in demanding thermal environments where standard electronic sensors might degrade, ensuring operators can confirm valve operation safely from a distance despite potential factory voltage spikes.

-25 °C ... 85 °C ambient temperatureTPE-U(PU) material housing2.5 kV surge immunityProtective conductor connection

3. Legacy Automation System Retrofit for Visual Fault Tracing

Upgrading older 230V AC automated sorting machinery by installing illuminating seals on existing Type C solenoid valves for enhanced visibility.

Problem Solved

Upgrades older automation grids that lack digital diagnostic fieldbus networks by providing local, highly visible LED actuation confirmation, effectively tolerating unstable older factory power grids without failing.

Permissible voltage fluctuations +/- 10 %Square design MSEBM2.5 central screw mounting230 V AC nominal operating voltage