Protection | Rosewill RP550-2-S, RP500-2-S manual

PERFORMANCE

2.2 Efficiency

The power supply is a minimum of 72% efficient under typical load. The “Energy Star” efficiency of the power supply is a minimum of 50% when the AC input power is 60W.

2.3 Remote ON/OFF control

The power supply DC outputs (with the exception of +5 VSB which is always available) are enabled with an active-low, TTL-compatible signal (“PS-ON”), When PS-ON is pulled to TTL low, the DC outputs are enabled. When PS-ON is pulled to TTL high or open-circuited, the DC outputs are disabled. PS-ON may be active by either electronic means or a mechanical switch.

2.4 Overshoot at TURN-ON/TURN-OFF

The output voltage overshoot upon the application or removal of the input voltage is less than 10%.

2.5 Hold-up Time

The power supply will maintain output regulation despite a loss of a minimum of 16 ms while under full load. Test to be performed at nominal input voltage.

2.6 Power Good Signal

A “power good” signal is asserted by the supply to indicate that the +5VDC output is within regulation limits.

Power Good Signal Characteristics

Signal Type	Open collector TTL compatible
Logic level low	<0.8V while sinking 5mA

Logic level high	>2.4V while sourcing 500uA
High state impedance	1K (from output to common)
POK delay	100-500ms

Power fall warning time	1ms minimum

3. Protection

3.1 Over Voltage Protection

The power supply prods latch-mode over-voltage protection as defined below:

Nominal output voltage	Trigger voltage
+12V	13.4-15.6V
+5V	5.74-7.0V
+3.3V	3.76-4.3V

4	POWER SUPPLY

RP500-2-S, RP550-2, RP500-2, RP550-2-S specifications

The Rosewill RP550-2-S and its siblings RP550-2, RP500-2, and RP500-2-S are notable power supply units (PSUs) that cater to a wide range of computing needs, especially for gaming and high-performance computing. These models, part of Rosewill’s reputable lineup, are designed with efficiency, compatibility, and reliability in mind, making them a popular choice for PC builders and gamers.

One of the standout features of the Rosewill RP550-2 and RP500-2 series is their certification for energy efficiency. Many of these models boast an 80 PLUS certification, which ensures that they deliver at least 80% efficiency at a range of load states. This not only translates into lower electricity bills but also helps in reducing heat output, leading to quieter cooling performance.

In terms of power output, the RP550-2-S offers a robust 550 watts of continuous power, while the RP500-2 and RP500-2-S provide 500 watts. This ample power capacity supports a variety of system configurations, allowing users to run mid to high-end graphics cards and processors without stability issues. The inclusion of multiple +12V rails provides better distribution of power to the components that require it most.

Cooling is another critical aspect addressed by these models. Featuring a 120mm fan, these power supplies ensure optimal heat dissipation while maintaining quiet operation. The fan’s intelligent design allows for efficient airflow, which is essential for keeping temperatures in check, especially during intensive gaming or resource-heavy tasks.

Connectivity options are generous across these models. They provide multiple PCIe connectors for graphics cards, SATA connectors for solid-state drives and hard drives, and plenty of Molex connectors for additional peripherals. This versatility allows users to build their systems according to their specific needs without running into compatibility issues.

Moreover, Rosewill places a strong emphasis on safety features in the RP series. With built-in protection mechanisms like Over Voltage Protection (OVP), Under Voltage Protection (UVP), Over Current Protection (OCP), and Short Circuit Protection (SCP), users can have peace of mind knowing that their components are safeguarded against potential electrical issues.

In summary, the Rosewill RP550-2-S, RP550-2, RP500-2, and RP500-2-S power supplies are designed to meet the demands of modern computing environments. With their focus on efficiency, reliability, and solid performance, these PSUs are ideal for both casual users and enthusiasts looking to build a stable and powerful PC. Whether you're gaming, working, or enjoying multimedia, these units deliver the necessary power and protection to keep your system operating smoothly.