General
Degree of protection	potted
Plug connection	DB9 plug/socket
Cable wiring	1:1 occupied
Shielding	Foil shielded
Connector lock	Knurled screws

The serial cable from BlackBox, type BC00231, is a universally applicable DB9 cable for connecting or extending serial devices. It features a plug/socket configuration and a length of 4.5 metres. The cable is designed for use in IT infrastructures where serial interfaces are required, for example with modems, multiplexers, or extending AT-style mice. The construction ensures reliable data transmission over the serial interface.

Serial cable with DB9 connectors is widely used in industry and IT environments, as they enable a stable, point-to-point connection. The cable is wired 1:1, meaning signal lines are transmitted directly without rerouting or special signal conversion. This is particularly important for devices that require direct, unaltered signal transmission.

DB9 plug and socket are moulded onto both ends of the cable, providing mechanical stability and protection against mechanical stress. The plugs are equipped with knurled screws to ensure a secure and firm connection, especially in environments with vibrations or frequent plugging and unplugging. This design is typical for professional applications where a durable and reliable connection is required.

Foil shielded, the cable minimises electromagnetic interference (EMI). The shielding protects transmitted signals from interference caused by nearby electrical devices or wiring, enhancing signal quality and data transmission reliability. This is particularly relevant in environments with high electromagnetic activity, such as server rooms or industrial facilities.

The cable is available in a length of 4.5 metres, providing sufficient reach for many standard applications. This length allows devices that are not positioned next to each other to be connected without requiring additional extensions or adapters. Extending serial devices, such as AT-style mice, is a typical application where the 4.5-m length is often sufficient.

The cable is suitable for use in various IT and industrial applications, particularly where serial interfaces are still in use. Connecting to modems or multiplexers is another typical use case, where the cable’s reliability and mechanical stability are advantageous. The universal configuration allows flexible use without requiring additional adapters.

The use of moulded connectors with knurled screws ensures high mechanical strength and prevents accidental disconnection. The foil shielding protects signals from interference, enhancing data integrity. The 1:1 wiring ensures signals are transmitted unchanged, which is crucial for compatibility with many serial devices.

Serial cables of this type are often found in older systems, industrial controls, or specialised IT infrastructures where the serial interface is still considered standard. The combination of mechanical robustness, EMI protection, and direct signal transmission makes this cable a reliable solution for professional use.