LAPP UNITRONIC® LiYCY 25x0,25 (0034425): The Shielded Multi-Core Cable Behind Clean, Interference-Free Control Wiring

Signal and control wiring runs through some of the noisiest electrical environments in a plant — right alongside motor cables, variable frequency drives, and switching contactors, all generating electromagnetic interference that can corrupt a weak signal line. When you need to route 25 separate conductors through that environment and keep every single signal clean, you need a cable specifically engineered for exactly that job. That's the UNITRONIC® LiYCY 25x0,25.

What Is the LAPP UNITRONIC® LiYCY 25x0,25?

The UNITRONIC® LiYCY 25x0,25 (Article 0034425) is a shielded, low-frequency data transmission cable from LAPP's UNITRONIC® range, built with 25 individually color-coded conductors, each at 0.25 mm² cross-section. It's specifically designed for communication, signal, and control applications in general-purpose industrial machinery installations.

Key Specifications

• Number of cores: 25
• Conductor cross-section: 0.25 mm² (24 AWG)
• Conductor material: Bare, fine-wire stranded copper
• Core color coding: DIN 47100 standard, colors without repetition — meaning every single conductor is individually identifiable without ambiguity, even across all 25 cores
• Shielding: Tin-plated copper braid, offering strong protection against electromagnetic interference (EMI) and radio frequency interference (RFI)
• Insulation/sheath material: PVC, grey
• Rated voltage: 250V / 0.5kV test voltage
• Operating temperature: -40°C to +80°C
• Nominal outer diameter: 10.7mm
• Flame retardance: Tested to IEC 60332-1-2, no flame propagation
• Weight: approximately 172 kg/km
• Bending radius: 6x outer diameter for fixed installation, 15x outer diameter for occasional flexing
• CPR classification: Eca

Why Shielding and DIN 47100 Color Coding Actually Matter

With 25 separate conductors running through a single cable, two design features make the real difference between a clean, maintainable installation and a troubleshooting nightmare:

Tin-plated copper braid shielding wraps the entire conductor bundle, providing a high degree of coverage against external electromagnetic and radio frequency interference. In an industrial environment where this cable often runs alongside power cables, VFDs, and switching equipment, that shielding is what keeps your signal or control circuit from picking up noise that could cause erratic readings, false triggers, or communication errors.

DIN 47100 color coding without repetition means each of the 25 cores has a genuinely unique, standardized color identification — critical when you're terminating 25 individual connections and need to trace each one correctly without ambiguity. This isn't just a convenience; on a cable this dense, mismatched or repeated coloring would make correct termination significantly harder and increase the risk of wiring errors.

Why the "LiYCY" Designation Matters

The LiYCY naming follows LAPP's cable-type coding convention: it indicates a cable built with fine-wire stranded conductors (offering flexibility), PVC insulation, and an overall copper shield — the specific combination suited to flexible, shielded, multi-core signal and control wiring. This isn't a power cable; it's purpose-built for carrying low-voltage signals, data, and control circuits where signal integrity matters more than current-carrying capacity.

Where This Cable Gets Used

• Assembly line tools and equipment — control and signal wiring between stations
• Machine control circuits — carrying multiple control signals within a single cable run
• Machine terminals — connecting multiple I/O points back to a central control panel
• Production line tools — general-purpose industrial machinery wiring
• RS-232 and process control instrumentation — data bus and low-voltage signaling applications
• Panel-to-panel or panel-to-field control wiring — wherever multiple separate signals need to travel together through one cable run, protected from interference

Why Choose a 25-Core Shielded Cable Over Multiple Smaller Cables

Running 25 individual signal or control wires separately means 25 separate cable runs, more cable tray or conduit space, and a genuinely messier installation. Bundling them into a single shielded, color-coded 25-core cable like this one simplifies routing, reduces installation labor, keeps the panel and machine wiring tidier, and — critically — ensures every conductor benefits from the same EMI/RFI shielding as a group, rather than relying on separate, potentially inconsistent shielding across multiple individual cables.

If you're also specifying power cables for the same panel or machine, see our ÖLFLEX® UNIPLUS single core cable guide and ÖLFLEX® control cable comparison guide for the power and control side of your wiring.

Why Buy Genuine LAPP UNITRONIC® Cables from SB Smart

SB Smart supplies genuine LAPP UNITRONIC® LiYCY shielded data cables, along with the broader UNITRONIC®, ÖLFLEX®, and SKINTOP® product ranges, with GST invoicing, competitive B2B pricing, and PAN India delivery.

Frequently Asked Questions (FAQ)

1. What is the UNITRONIC® LiYCY 25x0,25 used for? It's a shielded, 25-core data transmission cable used for communication, signal, and control wiring in general-purpose industrial machinery, process control instrumentation, and machine terminal connections.

2. Why is this cable shielded? The tin-plated copper braid shield protects the 25 internal conductors from electromagnetic and radio frequency interference common in industrial environments with motors, VFDs, and switching equipment nearby.

3. What does DIN 47100 color coding mean? It's a standardized core identification system where each of the 25 conductors has a unique color without repetition, making correct termination and tracing significantly easier.

4. What is the voltage rating of this cable? It is rated for 250V, with a 0.5kV test voltage.

5. What temperature range can this cable operate in? It is rated for -40°C to +80°C.

6. Is this cable flame retardant? Yes, it is tested to IEC 60332-1-2 for no flame propagation.

7. What is the conductor cross-section of each core? Each of the 25 cores has a 0.25 mm² (24 AWG) cross-section, using bare, fine-wire stranded copper.

8. Where can I buy genuine LAPP UNITRONIC® LiYCY cables in India? SB Smart supplies the genuine LAPP UNITRONIC® LiYCY 25x0,25 cable with GST invoicing, technical support, and PAN India delivery.

Final Thought

When 25 separate control or signal circuits need to travel through the same demanding industrial environment, the UNITRONIC® LiYCY 25x0,25 gives you exactly what that job requires — genuine EMI/RFI shielding, unambiguous DIN 47100 color coding, and flexible, flame-retardant construction, all bundled into a single, well-organized cable run that keeps your signals clean and your wiring manageable.