Serial adapter cable Renkforce RF-4543257 — 1× SUB-D 9-pin (male) to 1× SUB-D 25-pin (female)

Renkforce RF-4543257 is a serial adapter cable that converts a 9-pin SUB-D (DE-9) male connector to a 25-pin SUB-D (DB-25) female connector. The cable enables direct connection between devices that use different RS-232 physical connectors, allowing data transfer, configuration, or control signals to pass between legacy equipment and modern interfaces without additional converters. The adapter is designed for straightforward wiring compatibility in environments where DB-9 and DB-25 ports must be linked.

Advantages

The adapter cable provides a compact and reliable way to bridge DE-9 and DB-25 serial ports without modifying existing devices. Its fixed wired connections reduce the need for multiple adapters or custom cables, and the sturdy SUB-D connectors help ensure consistent contact and signal integrity in industrial or service settings. The simple passive design means no external power or drivers are required for basic RS-232 signal passthrough.

Suitable for

• Connecting computers or terminals with DE-9 ports to equipment with DB-25 serial interfaces
• Service, diagnosis, and configuration of industrial controllers, modems, or measuring instruments
• Interfacing legacy serial devices in laboratory, workshop, or field environments

Key specifications

• Connector A: 1× SUB-D 9-pin (male)
• Connector B: 1× SUB-D 25-pin (female)
• Signal standard: RS-232 (passive wiring, adapter cable)
• Cable type: fixed serial adapter cable with molded connectors
• Contact finish: metal SUB-D housings for mechanical durability

How to use

Connect the 9-pin male SUB-D connector to the DE-9 serial port of the source device and plug the 25-pin female SUB-D connector into the target device's DB-25 serial port. Ensure both devices are powered off when making the physical connection if recommended by the device manufacturers. After securing connectors using the thumbscrews or fastening hardware, power on the devices and configure serial parameters (baud rate, parity, stop bits, flow control) in each device or terminal software to match the communication settings required for the application.

Recommendations

Use the adapter cable where simple passive conversion of RS-232 pinouts is sufficient. Verify pinout compatibility between devices before use, and avoid relying on the adapter for signal level translation beyond standard RS-232 ranges. For long cable runs, electrically noisy environments, or when hardware handshaking differs between devices, consider checking signal integrity or using a powered converter or line driver as appropriate.