Does FireWire 800 Provide Power?
FireWire 800, also known as IEEE 1394b, is a high-speed interface that has been widely used for connecting various peripherals to computers. One common question that arises among users is whether FireWire 800 provides power to connected devices. In this article, we will explore this topic and shed light on whether FireWire 800 can supply power to peripherals.
Understanding FireWire 800
FireWire 800 is an extension of the original FireWire (IEEE 1394) standard, which was introduced by Apple in the 1990s. The “800” in FireWire 800 refers to the maximum data transfer rate of 800 Mbps (megabits per second). This interface is known for its high-speed data transfer capabilities, making it ideal for transferring large amounts of data, such as video and audio files.
Power Supply Capabilities of FireWire 800
Now, let’s address the main question: Does FireWire 800 provide power? The answer is both yes and no, depending on the specific device and the version of FireWire being used.
FireWire 400 vs. FireWire 800
It’s important to note that FireWire 400, the predecessor to FireWire 800, does not provide power to connected devices. FireWire 400 is limited to a maximum data transfer rate of 400 Mbps and is typically used for connecting peripherals like external hard drives and scanners.
However, FireWire 800 is capable of providing power to certain devices. This capability is known as “FireWire Power Over Cable” (POC) and is supported by some FireWire 800 controllers and peripherals. Devices that can receive power through FireWire 800 include some external hard drives, audio interfaces, and some cameras.
Check Compatibility
If you’re considering using FireWire 800 to power a device, it’s crucial to check the compatibility. Ensure that both the FireWire 800 controller and the peripheral support POC. Most devices that can be powered through FireWire 800 will have a label or a symbol indicating that they are compatible with POC.
Power Limitations
It’s important to note that the power provided by FireWire 800 is limited compared to other power sources, such as USB or AC power. The maximum power output for FireWire 800 is typically around 500 mA (milliamperes), which may not be sufficient for high-power devices. In such cases, it’s advisable to use an alternative power source or a dedicated power adapter.
Conclusion
In conclusion, FireWire 800 does have the capability to provide power to certain devices, but it’s not a universal power solution. It’s essential to check the compatibility between the FireWire 800 controller and the peripheral to ensure that power is supplied effectively. While FireWire 800 is a high-speed interface with various applications, it’s important to understand its limitations, especially when it comes to power supply.
