3m Sensor Extension Cable – Critical Signal Link for Semi-Trailer ABS/EBS Systems

Description

The 3m Sensor Extension Cable (Part No. 4497490300) is a critical signal transmission component in semi-trailer brake systems, connecting wheel speed/pressure sensors to ABS/EBS ECUs. Designed to extend sensor range while preserving data integrity, it features ​22AWG tinned copper conductors and ​dual-layer shielding (aluminum foil + tinned copper braid, ≥85% coverage) to suppress EMI/RFI, ensuring ≤0.3dB signal loss and ≤1.5ms delay over 3 meters.

Core Functions:

1. ​Signal Fidelity: Low-impedance conductors and twisted-pair design (≥20 twists/meter) minimize attenuation and crosstalk.
2. ​Environmental Resistance: Oil/acid-resistant PVC sheathing (tensile strength ≥15MPa) and XLPE insulation (-40℃~125℃) protect against vibration, water, and chemicals.
3. ​System Compatibility: Transmits 5V/12V analog and PWM digital signals for WABCO/Knorr-Bremse ABS/EBS modules.

Key Importance:

• ​Braking Safety: Signal distortion may cause ECU misjudgment, leading to delayed braking or wheel lock.
• ​Material Impact:
  • ​Conductor Purity: Tin-plated copper resists oxidation (resistance ≤26Ω/km).
  • ​Shielding Efficacy: Dual-layer shielding attenuates ≥60dB interference.
  • ​Sheathing Durability: High tensile strength prevents cable breakage.

Replacement Guidelines:

1. ​Length Compliance: Use OEM 3m cables; cutting alters impedance matching.
2. ​Shielding Grounding: Braid must be 360° bonded to sensor housing (ground resistance ≤0.2Ω).
3. ​Bend Protection: Static bend radius ≥50mm, dynamic ≥80mm (use spiral wrap for fixation).
4. ​Contact Cleaning: Gold-plated pins (≥0.5μm) require oxidation removal (contact resistance ≤10mΩ).