Serial Cable DeLOCK RS-232 D-Sub 9 female to female null modem 87278

This DeLOCK Serial Cable RS-232 (model 87278) is a full-handshake null modem cable with DB-9 (mini D-Sub 9) female connectors on both ends. It supports hardware flow control using RTS/CTS and DTR/DSR and allows direct connection between RS-232 devices; the RI line can optionally supply power to connected devices. The compact mini D-Sub 9 plug housing (44 x 33.3 x 15 mm) enables installation of adjacent RS-232 ports without interference.

Advantages

The cable provides full handshake support (RTS/CTS, DTR/DSR) for reliable serial communication. Its 1 m length and 5 mm diameter offer a balance of flexibility and durability. Female-to-female DB-9 connectors permit direct null modem connections between devices without additional adapters. The narrow connector housing helps when using multiple RS-232 ports close together.

Suitable for

• Connecting two RS-232 devices directly in a null modem configuration
• Serial data transfer where hardware flow control (RTS/CTS, DTR/DSR) is required
• Industrial equipment, legacy PCs, networking hardware, and serial consoles

Key specifications

• Manufacturer: DELOCK
• Model / MPN: 87278
• EAN: 4043619872787
• Connector: D-Sub 9 (DB-9) female — both ends
• Cable type: RS-232 null modem, full handshake (RTS/CTS, DTR/DSR)
• Length: 1 m
• Cable diameter: 5 mm
• Connector housing dimensions: 44 x 33.3 x 15 mm

How to use

Plug the female DB-9 connectors into the RS-232 ports of the two devices you want to connect. Ensure devices are configured for null modem communication and hardware flow control if required. If a device needs power from the RI line, enable or configure that function according to the device manual. Verify serial port settings (baud rate, parity, stop bits, flow control) on both devices before starting data transfer.

Recommendations

Use the cable in environments where RS-232 legacy connections are required and avoid excessive bending near the connector. For critical installations, check the connected devices' pinout and flow control settings to ensure compatibility.