Generic Unbranded 504-209 DE9 Male to 8P8C Modular Adapter

Product Description

The 504-209 is a DE9 male to 8P8C modular adapter designed for serial and communications wiring applications. This adapter provides a physical interface between a standard 9-pin D-Sub male connector and an 8-position 8-contact (8P8C) modular jack, allowing technicians to bridge legacy serial ports with modern structured cabling or console connections. It is a passive, no-power adapter suited for low-voltage data and communications work in both commercial and light industrial environments. Network technicians, IT infrastructure installers, and data cabling professionals typically deploy this type of adapter at patch points, console connections, or custom cable assemblies.

This adapter is used in environments where DE9 serial interfaces must connect to RJ-style modular cabling. Common applications include console rollover cables, serial-to-Ethernet adapters, terminal server connections, and custom communications patch assemblies. It is appropriate for use in both new installations and retrofit scenarios where legacy DE9 serial equipment must be integrated into structured cabling infrastructure.

Key Features

• DE9 male connector interfaces with standard 9-pin serial port equipment
• 8P8C modular jack accepts standard RJ-style plugs for structured cabling connections
• Passive adapter with no active components or external power required
• Compact form factor for use at patch panels, bulkhead points, or directly on equipment ports
• Suited for console, terminal, and serial communications wiring applications

Compatibility

Designed as a general-purpose DE9 male to 8P8C modular adapter for use in serial communications and data cabling applications.

Installation Notes

Installation is performed by data cabling and network technicians. No tools are required for the adapter connection itself, though proper strain relief and cable management should follow site standards. Ensure the serial port on the host device is disabled or the system is powered down before connecting or disconnecting to avoid signal disruption. Verify pin mapping between the DE9 interface and the 8P8C modular connection against the application wiring diagram before commissioning.

Technical Specifications

• Connector A: DE9 Male (9-pin D-Sub)
• Connector B: 8P8C Modular Jack
• Adapter Type: Passive

Standard Information

• Brand: GENERIC / UNBRANDED
• Manufacturer Part Number: 504-209