Black Box EYN257T-0010-FF

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.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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