MC-LD-230AC Festo Illuminating seal

Technical Overview

The Festo MC-LD-230AC is a transparent illuminating seal designed for solenoid valves. It features an integrated LED switching position indicator and is designed for a nominal operating voltage of 230V AC. This seal provides IP65 protection and conforms to the Square design MSC electrical connection according to DIN EN 175301-803. It is constructed from high-quality TPE-U(PU) and is intended for secure mounting via an M3 central screw.

Key Features

Integrated switching position indicator LED
On-valve mounting via M3 central screw
Square design MSC electrical connection to DIN EN 175301-803
High IP65 degree of protection
Wide ambient temperature range of -25 °C to 85 °C
Compliant with EU Low Voltage Directive (CE mark)
LABS (PWIS) conformity to VDMA24364-B2-L
Durable TPE-U(PU) housing material

Technical Specification Matrix

Parameter	Value
Switching position indicator	LED
Type of mounting	On solenoid valve via M3 central screw
Product weight	1.6 g
Electrical connection	To DIN EN 175301-803 Square design MSC
Nominal operating voltage AC	230 V
Immunity to surge	4 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. Food and Beverage Packaging Line Diagnostic Monitoring

Implementation of illuminating seals on solenoid valves across high-throughput packaging lines to provide clear visual feedback of valve actuation status.

Problem Solved

Reduces downtime during system faults by allowing maintenance technicians to instantly verify 230V AC electrical signals to solenoid valves without using multimeters, while the IP65 rating safely withstands light washdown environments.

230V ACIP65 degree of protectionLED switching position indicatorSolenoid valve diagnosticsDIN EN 175301-803

2. Outdoor Bulk Material Handling Conveyor Control

Utilization of the illuminating seal in outdoor pneumatic control cabinets for grain or mining conveying systems subjected to harsh seasonal weather.

Problem Solved

Eliminates the need for manual electrical probing in freezing or hazardous conditions by providing reliable LED visual confirmation of valve status in ambient temperatures ranging from -25 to 85 degrees Celsius.

Ambient temperature -25C to 85CPneumatic actuationTPE-U(PU) housing materialVisual troubleshooting

3. Automotive Robotic Welding Cell Pneumatic Clamping

Integration into the pneumatic clamping solenoid valves of automotive welding robots where heavy electrical noise, transients, and high voltages are common.

Problem Solved

Provides reliable visual indication of PLC output to the valve coil despite heavy electrical interference, utilizing the 4 kV surge immunity and tolerance for +/- 10 percent voltage fluctuations to prevent false diagnostics during electrical spikes.

4 kV immunity to surgePermissible voltage fluctuations +/- 10%M3 central screw mountingAutomotive automation clamping