General
Cable type	extension cable
Connector type	DB25 male/male
Assignment	1:1
Shielding	shielded
Plug configuration	fully encapsulated
Mounting	Knurled screws
Maximum range	7,6 m

The extension cable from BlackBox enables the extension of existing parallel or serial connections. It features a DB25 plug at both ends and is designed with a length of 3.0 meters to extend the reach of devices such as printers, industrial controls, or other legacy systems. The connection is made via a 1:1 wired cable, ensuring direct and unaltered signal transmission. The shielding of the cable reduces electromagnetic interference and ensures stable data transmission, particularly in environments with high electromagnetic noise.

Extension cable with DB25 plugs at both ends is designed for use in IT and industrial applications where a mechanically robust and electrically reliable connection is required. The plugs are fully potting, providing high mechanical stability and protection against mechanical stress. The use of knurled screws on the plugs enables a secure and firm connection, which is particularly advantageous for frequent plugging and unplugging or in moving environments. This design reduces the risk of contact loss and ensures lasting signal quality.

Shielding is an essential component of the cable to maintain the integrity of transmitted data. The shielding protects the cable from external electromagnetic interference, which may occur during use in industrial or technical environments. This minimizes the likelihood of data errors or signal loss. The cable is suitable for parallel and serial applications, with the exact use depending on the respective device configuration.

DB25 plugs are a standard in legacy IT and industrial communication. They enable the connection of devices communicating via parallel or serial interfaces, such as older printers, modems, or industrial control devices. The use of plugs at both ends (plug/plug) requires a corresponding socket connection point on the device to establish a connection. The 1:1 wiring ensures that each signal pin is directly transmitted to the corresponding pin at the other end, without rerouting or reprogramming.

Knurled screws on the plugs provide a mechanically secure fastening. They allow for a precise and firm connection, which is particularly beneficial for frequent changes or in environments with vibrations or movement. The potting construction of the plugs increases mechanical strength and protects the contact surfaces from contamination or mechanical wear.

The cable is designed for a maximum extension of up to 7.6 meters, while the actual length of the delivered product is 3.0 meters. The 7.6-meter specification refers to the maximum reach achievable with this cable type under optimal conditions, although the delivered length is 3.0 meters. Use beyond the specified length may result in signal loss or data errors, especially at higher data rates.

Applications include primarily the extension of legacy peripheral devices such as printers, modems, or industrial controls communicating via parallel or serial interfaces. It is suitable for applications in offices, workshops, or industrial environments where a stable and mechanically robust connection is required. The shielding and potting plugs also make it suitable for environments with increased interference levels.

The connection is made via a 1:1 wired cable, which does not offer additional functions such as signal conversion, amplification, or protocol conversion. It serves exclusively for the mechanical and electrical extension of an existing connection. Signal quality depends on the quality of the devices used and the total length of the connection. Additional signal amplification may be required for longer connections or in environments with high electromagnetic noise, but this is not part of this cable.

Compatibility is provided for all devices equipped with a DB25 socket for parallel or serial interfaces. Use requires that the device has a corresponding socket connection point. The 1:1 wiring ensures compatibility with standard DB25 connections. No special accessories or additional adapters are required to use the cable.

Installation is performed by simply inserting the plugs into the corresponding sockets and then tightening the knurled screws to ensure a secure connection. No tools are required, as the knurled screws can be tightened manually. The potting construction of the plugs ensures that no additional protective measures such as heat shrink tubing or adhesive are necessary.

Operational advantages include mechanical robustness, easy handling, and reliable signal transmission. The knurled screws and potting construction reduce the risk of contact loss, especially during frequent plugging and unplugging. The shielding ensures low susceptibility to interference, increasing the reliability of the connection. The cable is suitable for use in environments with moderate mechanical or electromagnetic stress.