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Black Box DB9 serial null-modem cable 10 ft metal hoods male female connectors

Black Box Corporation

Black Box Corporation EYN257T-0010-MF 10-Ft RS232 Shielded Null Modem Cable network antenna

SKU CH-W80R-W2696 MPN EYN257T-0010-MF

A 10-foot shielded null-modem cable with DB9 male and female connectors for RS232 serial links

  • 10-foot length suits desk-to-device runs
  • Shielded construction reduces electromagnetic interference
  • Null-modem wiring enables direct DTE-to-DTE links
  • DB9 male-to-female connectors fit legacy serial ports
  • Metal hoods protect pins from physical damage

10-Ft RS232 Null Modem Cable

The Black Box EYN257T-0010-MF is a 10-foot shielded cable designed for direct RS232 serial links between two DTE devices. It crosses transmit and receive lines internally so no external adapter is required. The DB9 male-to-female pinout suits legacy industrial, networking and point-of-sale equipment that still relies on serial console or modem emulation.

RS232 Distance And Shielding Limits

RS232 signalling is specified for short runs and the 10-foot length stays well within the typical practical range for reliable 232 communication. The overall foil and braid shield reduces electromagnetic pickup from nearby power cables or switching gear. Signal integrity will still degrade if the link is extended far beyond this length or routed through electrically noisy conduits without additional protection.

Metal Hoods And Everyday Handling

Each connector is covered by a metal hood that protects the solder joints and provides strain relief when the cable is plugged or unplugged repeatedly. The hoods also maintain shield continuity right to the connector shell, helping to keep ground loops and radiated noise under control. The male/female combination allows a straight connection to a standard DB9 port on one side and a gender-matched mate on the other.

How it compares

Measured against everything we stock in Wi-Fi Antennas & Wireless Bridges, at today’s prices. Recalculated every night.

Price $34.99
Typical for this category: the median of 399 items is $31.99.

Specifications

Size & build
Shipping weight0.45 kg
Package size305 × 229 × 13 mm

Questions about this item

Should I choose the 10-ft length or the 5-ft version for my RS-232 setup?

The 10-ft cable gives you extra reach between rack-mounted gear and a desktop console without adding a coupler, while the 5-ft version suits tighter benches where slack would snag.

What does the 232 designation mean once the cable is plugged into a live machine?

It confirms the wiring follows the RS-232 null-modem pinout, so transmit and receive lines cross inside the hood and two DTE ports can talk directly without a separate adapter.

How does the DB9 interface cap what I can connect in practice?

The DB9 male and female ends limit you to legacy serial ports that still use the 9-pin D-sub shell, so any device needing a 25-pin or USB serial converter will need an additional adapter.

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