The power supply is housed in a robust IP56-rated enclosure, mechanically designed for efficient conduction cooling, and compliant with DNV/GL standards.
From low-power local DC/DC converters powering sensors to high-power DC generators powering the entire ship, vessels are filled with electrical and electronic equipment requiring robust and reliable power supplies. While many applications can be powered by commercially available Certified Off-the-Shelf (COTS) marine power supplies, others are highly specific and require unique power solutions designed to suit the end application.
One example is the servomotors used to operate quick-switching valves (FSVs), such as those used for safety in fuel injection pumps, yaw propellers, and engine control.
The operation of the FSV relies on servomotors to ensure that fluids are transferred or interrupted with the highest level of safety. Since failure is not an option with this type of equipment, FSV manufacturers typically use two independent power supplies to ensure redundancy. However, given that the equipment is installed in very compact and harsh environments, this can be challenging for the installer.
With extensive experience in designing power solutions for the marine industry according to DNV/GL standards, PRBX has developed the highly integrated and isolated dual-channel DC/DC converter, the ENMA500D24/2x27-CC.
Often used in harsh environments, the ENMA500D24/2x27-CC is housed in a robust IP56-rated enclosure, resistant to high pressures and powerful water jets. Sealed to meet IP56 standards, the ENMA500D24/2x27-CC DC/DC converters have been designed and optimized for conduction cooling. Two side heatsinks facilitate heat exchange between the internal heat sink components and the external environment.
Powered by the low 24V supply distributed to electronic equipment, the ENMA500D24/2x27-CC can tolerate a wide operating range of 18 to 36V and can withstand a large voltage drop of up to 10V for 10 seconds. The ENMA500D24/2x27-CC delivers 27VDC/20A and a total power of 540W, with an efficiency greater than 85%.
It is generally used for security equipment requiring redundant power supplies. When redundancy is not required but the application demands two independent outputs, the ENMA500D24/2x27-CC provides two fully isolated 27VDC outputs. In this case, the total output power remains at 540W, although it can be balanced from 540W on one output and no load on the second, to any mix of the two as long as it remains within the maximum permissible power.
The ENMA500D24/2x27-CC is protected against reverse polarity of the input, short circuit of the output, and includes protection against over-temperature, over-voltage, and over-current. It is designed in accordance with EN60068-2-xy and complies with the safety standard EN 60950.
