Quick Summary:
The 4P4C to DB9 Spiral Wire Harness is an industrial communication cable assembly designed for PLC programming, diagnostic equipment, and automation systems. Featuring a flexible TPU/PU coiled cable structure, RJ-style 4P4C connector, and DB9 serial interface, this harness provides space-saving cable management and reliable RS232, RS485, or TTL communication connections.
Product Overview
The 4P4C to DB9 Spiral Wire Harness is designed for industrial communication applications requiring flexible cable routing, compact storage, and stable serial connections.
Featuring a 4P4C RJ-style modular connector on one end and a DB9 D-Sub interface on the other, this spiral cable assembly provides a practical connection solution for PLC programming equipment, industrial controllers, and diagnostic systems.
The coiled TPU or PU cable design provides excellent flexibility and retractable memory, helping reduce cable clutter while allowing operators to move equipment within a working area.
With customizable pin mapping, cable length, connector configuration, and shielding options, this harness can be adapted for different industrial communication requirements.
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Product Specifications
| Specification Item | Technical Details |
| Connector A | 4P4C RJ9 / RJ10 Modular Plug |
| Connector B | DB9 D-Sub 9-Pin Male or Female |
| Cable Type | Spiral / Coiled Cable with PU or TPU Outer Jacket |
| Core Conductor | High-Purity Tinned Copper Multi-Strand Wire |
| Expanded Length | Custom Length Options Available |
| Retracted Length | Compact Spiral Structure with Custom Expansion Ratio |
| Communication Protocol | RS232, RS485, or TTL Logic |
| Shielding | Aluminum Foil + Braided Shield Options Available |
| Certification | CE, RoHS, ISO 9001 |
Key Features
Flexible Spiral Cable Design
The TPU or PU spiral cable structure provides excellent flexibility and retractable memory, allowing the harness to extend when required and return to a compact form after use.
Reliable Serial Communication Connection
The combination of 4P4C and DB9 connectors supports stable communication interfaces for PLC programming, industrial controllers, and diagnostic equipment.
Industrial-Grade Cable Protection
The outer jacket is designed to withstand daily industrial use, including repeated bending, cable movement, and exposure to common factory environments.
Space-Saving Cable Management
The coiled structure reduces cable storage space, prevents unnecessary cable loops, and helps maintain organized work areas around industrial equipment.
Industrial Applications
PLC Programming & Maintenance
Used for connecting programming devices, controllers, and diagnostic interfaces during PLC setup, maintenance, and troubleshooting.
Industrial Controllers & HMI Equipment
Suitable for handheld controllers, operator interfaces, and industrial electronic devices requiring flexible communication connections.
CNC & Automation Systems
Provides reliable serial communication links for CNC equipment, automation machinery, and control systems where flexible cable movement is required.
Technical & Surface Performance
The spiral wire harness uses flexible TPU or PU outer jacket materials designed for repeated bending, extension, and daily industrial use. The coiled structure helps maintain cable flexibility while reducing permanent deformation during operation.
The internal conductors use high-purity tinned copper multi-strand wires to provide stable signal transmission and improved corrosion resistance for industrial communication applications.
Connector ends are reinforced with strain relief structures to reduce stress concentration at bending points and improve long-term cable durability.
Bespoke & OEM Manufacturing
We provide customized 4P4C to DB9 spiral wire harness solutions according to customer communication requirements, equipment layout, and connection specifications.
- Custom Pinout Mapping:
The internal wiring between 4P4C and DB9 connectors can be customized according to specific communication protocols or equipment requirements. - Cable Length & Coil Design:
Expanded length, retracted length, coil diameter, and cable flexibility can be adjusted for different installation spaces. - Connector Configuration:
DB9 male, female, right-angle, and other connector options are available based on application requirements. - Cable Jacket Options:
Different TPU or PU jacket colors and protection options can be provided for identification and industrial environments. - Shielding Options:
Additional foil shielding or braided shielding can be added for applications requiring improved electromagnetic protection.
Production Process
High-Tension Coiling & Heat Setting
The spiral cable is produced through controlled coiling and heat-setting processes to maintain consistent coil shape, expansion performance, and long-term flexibility.
Precision Connector Assembly
Connector terminals are assembled using controlled processes to ensure accurate wiring, reliable contact, and proper mechanical reinforcement at both cable ends.
Electrical & Retraction Testing
Each cable assembly can be tested for electrical continuity, pin configuration accuracy, and spiral extension performance according to customer requirements.
FAQ
Can you customize the 4P4C to DB9 pinout for specific equipment?
Yes. The internal wiring between the 4P4C and DB9 connectors can be customized according to specific PLC systems, communication requirements, or legacy industrial equipment.
What communication protocols can this spiral harness support?
The harness can support RS232, RS485, TTL logic, and other customized serial communication requirements depending on the wiring configuration.
Can the DB9 connector be customized?
Yes. DB9 male, female, right-angle, and other connector configurations can be provided according to equipment installation requirements.
Why use a spiral cable instead of a straight cable?
A spiral cable provides better space management by extending when needed and retracting when not in use, making it suitable for handheld controllers, programming tools, and movable industrial equipment.
Are TPU spiral cables suitable for industrial environments?
Yes. TPU jacket materials provide good flexibility, abrasion resistance, and durability for industrial applications involving repeated movement and cable handling.
Can you provide customized cable lengths?
Yes. Expanded length, retracted length, coil dimensions, connector combinations, and wiring configurations can be customized according to application requirements.
