Features
Output voltage	13 V
Power
Capacity	10.4 W

The HP power supply with manufacturer number 0957-2229 is a wall-mount module for powering JetDirect printer network adapters, specifically for models EX3+ and 300X. It functions as a voltage converter, transforming alternating current from the public power grid into a constant direct current voltage required for the reliable operation of connected devices. The unit is designed for use in office environments and with network printers connected to the network via a JetDirect interface.

Applications
This power supply is specifically designed for powering HP JetDirect network adapters installed on printers to enable network access via a local area network (LAN). It is used in environments where stable and reliable power supply is required for the printer's network functions. The wall-mount design allows for compact and space-saving installation, with the unit directly attached to the power outlet.

Functions and Features in Detail
The device converts an input voltage of 220 to 250 volts AC (VAC) at a frequency of 47 to 53 hertz into an output voltage of 13 volts DC (VDC). The maximum output power is 10.4 watts, corresponding to a current of 800 milliamperes (mA). These specifications ensure sufficient power supply for the relevant JetDirect adapters, without voltage fluctuations or interruptions. The output voltage is stable and suitable for the sensitive electronic components of the network adapters.

Technology Explained Simply
The power supply operates as a voltage converter, transforming the high alternating voltage from the public power grid into a low, constant direct voltage. This is necessary because the internal circuits of JetDirect adapters can only operate with a specific direct voltage. The wall-mount design allows for secure attachment to the power outlet, preventing the unit from being obscured by cables or other devices. The input voltage range of 220–250 VAC covers standards in many European countries, making the device suitable for worldwide use.

Compatibility and Accessories
The power supply is specifically developed for HP JetDirect models EX3+ and 300X. It is not intended for other printer models or network adapters with different voltage requirements. Compatibility is limited to the specified JetDirect adapters.

Installation and Mounting
Installation is performed by wall-mounting directly to the power outlet. The unit is attached to the wall, and the network cable from the JetDirect adapter is connected to the power supply. Power is supplied via the power supply, which is plugged into the outlet. No additional mounting equipment is required, as the unit is designed for direct wall mounting.

Operational Advantages
The stable output voltage of 13 VDC ensures reliable power supply for the JetDirect adapters, maintaining a stable network connection for the printer. The wall-mount design saves space and prevents cable clutter. The input voltage range of 220–250 VAC makes the device suitable for use in various countries without requiring additional adapters or voltage converters. The output power of 10.4 watts is sufficient to meet the operational requirements of the JetDirect adapters without causing overloads.