Black Box 10ft RS232 Shielded DB9 Female to Female Null Modem Cable (Gray)

Overview

The Black Box EYN257T-0010-FF is a 10-foot RS232 shielded null modem cable designed to connect two devices with DB9 female ports for direct serial communication. It supports reliable data transfers by crossing the necessary pins to meet RS-232 standards, making it suitable for stable serial connections in IT, industrial, and legacy system environments. Its shielding and impedance characteristics ensure data integrity even over longer distances.

Key features

• 10-foot length provides flexibility in device placement without signal loss
• DB9 female connectors on both ends allow direct connection between serial devices without adapters
• Metal EMI/RFI hoods shield the cable to minimize electromagnetic and radio frequency interference
• 115-ohm nominal impedance at frequencies above 1 MHz supports high-frequency data transfer with reduced signal degradation
• Durable gray PVC jacket protects the cable from physical wear and environmental factors
• Complies fully with RS-232 standards to ensure compatibility and reliable communication between devices

Key specs

• Cable length: 10 feet (3.0 meters)
• Connector type: DB9 female to DB9 female
• Shielding: Metal EMI/RFI hoods
• Impedance: 115 ohms nominal at 1 MHz and above
• Jacket material: Gray PVC
• Standard compliance: RS-232

Connectivity and compatibility

This cable is designed to connect devices that use DB9 female serial ports, such as modems, routers, industrial controllers, and other legacy serial equipment. Its null modem wiring crosses transmit and receive lines, enabling direct communication between two DTE devices without requiring a modem or other intermediary hardware. The shielding and impedance characteristics make it well suited for environments where interference could otherwise disrupt data transmission.

Ideal uses and environments

The cable works well in office IT setups, industrial control systems, and maintenance of legacy serial devices where reliable and interference-free serial communication is essential. Its length and shielding make it a strong choice for technicians and engineers who need dependable connections for file transfers, device configuration, or serial data exchange in both professional and industrial settings.