Loopback adapter DeLOCK 66827 DB9 female RS-232/422/485

The DeLOCK Loopback adapter 66827 is a DB9 female serial connector designed for testing and troubleshooting RS-232, RS-422 and RS-485 communication lines. It enables loopback of transmit and receive signals to allow error and data analysis during development, maintenance and diagnostics. The adapter is finished in silver and is compact for convenient handling in laboratory and field environments.

Advantages

The adapter supports multiple serial standards (RS-232/422/485) using a DB9 female connector, making it suitable for diverse device interfaces. Its simple passive design requires no power or software, so it can be quickly deployed for loopback tests and line verification. The compact silver housing provides easy handling and portability for engineers and technicians.

Suitable for

• Testing and troubleshooting serial ports using DB9 connectors
• Loopback and signal verification for RS-232, RS-422 and RS-485 lines
• Device diagnostics, maintenance and firmware or data transmission checks

Key specifications

• Connector: DB9 female (Serial RS-232/422/485)
• Supported standards: RS-232, RS-422, RS-485
• Colour: Silver
• Manufacturer: DELOCK
• MPN: 66827
• EAN: 4043619668274

How to use

Connect the adapter to the device's DB9 serial port to route transmit pins back to the receive pins, creating a loopback condition. Use appropriate serial terminal software or test equipment to send and receive data; verify that transmitted data is received correctly to confirm port functionality. For RS-422/RS-485 systems, ensure proper wiring and termination on the bus before testing.

Recommendations

Use the adapter only for diagnostic and testing purposes on compatible DB9 serial interfaces. Ensure the device under test is powered and configured to the correct serial standard and baud rate. Avoid using the adapter on active multi-drop RS-485 networks without isolating the node to prevent interference with other devices.