DB9 9‑Pin RS232 Crossover Serial Cable — 0.5 m to 30 m, 11 length options; male‑male, female‑female, or male‑female connectors Key benefits Reliable device-to-device serial connections: Crossover wiring (TX/RX crossed) enables direct RS232 communication between two serial devices without a modem or adapter. Durable, long‑lasting construction: Gold‑plated pins resist oxidation and corrosion; metal shell housings protect connectors from wear and EMI. Consistent signal integrity over distance: 28 AWG conductors plus double‑layer shielding reduce interference and support stable, high‑speed transmission for serial data. Flexible fit for many setups: Eleven length options from 0.5 m to 30 m and three connector configurations (male‑male, female‑female, male‑female) let you choose the exact cable for your application. Features and compatibility Connector: DB9 (9‑pin) RS232 crossover cable designed for standard 9‑pin serial ports. Interfaces available: male‑male, female‑female, male‑female to match device port types. Lengths available: 0.5 m to 30 m (11 length choices) to suit close‑range and extended runs. Materials: gold‑plated pins for corrosion resistance; metal connector shells for mechanical protection. Cable construction: 28 AWG conductors with double‑layer shielding for reduced noise and reliable transmission. Function: crossover wiring for direct serial communications between PCs, controllers, instruments, and other RS232 devices. Typical use scenarios Industrial control: Connect PLCs, CNC controllers, HMIs, and other factory equipment that use 9‑pin RS232 ports for program loading, diagnostics, or telemetry. Networking and telecom: Link routers, modems, serial console ports, and switches for configuration and maintenance. Point-of-sale and test instruments: Connect POS terminals, barcode scanners, lab instruments, or measurement devices to PCs or data loggers for data transfer and control. What you get A DB9 9‑pin RS232 crossover cable built for durability and consistent serial performance, available in the connector type and length that match your setup.