Dahua Technology, a video-centric, provider of smart IoT solutions, is rolling out a new generation of Power over Ethernet (PoE) transmission devices designed to provide higher power and protection, further transmission distances, and smarter management features.
These PoE 2.0 switches come in 16-port and 24-port gigabit models, both designed for field transmission applications and high-definition video. “Our slogan for PoE 2.0 is ‘higher, further, smarter’,” noted Damon Chou, Solutions Product Manager for Dahua USA.
Higher power requirements
“This represents the features Dahua has built into the new PoE devices that make them well suited for a wide range of applications and integrations.” For higher power, the new switches now support IEEE 802.3bt standard which supports up to 90 Watts on the red labelled ports — ideal for IoT devices that have higher power requirements.
To maximise flexibility, the 90W ports are backward compatible so users can connect devices that still use old PoE standards, if necessary. When it comes to ‘further,’ the 8-wire PoE transmission offers a more stable connection than previous models and has a transmission distance of approximately 820 feet (250 meters), a significant improvement over typical PoE switches. Features for smarter management include PoE Watchdog, intelligent PoE, and non-blocking video transmission.
Automatic power cycle
Dahua’s testing shows that PoE Watchdog auto-detects and recovers 99% of faulty cameras
PoE Watchdog is an easy-to-enable ‘self-healing’ function by which the switch detects signals from cameras on the network. “If it doesn’t receive any signal, it will do an automatic power cycle to restart the camera. This is a great feature that keeps installers from having to physically go on site to check whether cables are okay or whether they’re physically connected,” said Chou.
Dahua’s testing shows that PoE Watchdog auto-detects and recovers 99% of faulty cameras. Intelligent PoE is a power consumption management tool that guarantees power to ports designated as a top priority. This ensures that mission-critical devices won’t lose power or data in the event of power fluctuations.
Detecting power consumption
“Unlike typical switches that shut down all ports at once, this switch shuts down the largest number port first, then the next largest, until it detects the power consumption is below the PoE budget,” Chou explained. “For example, if the switch has eight PoE ports and each port is connected to a network camera, the switch disables port number eight first, then subsequent ports, until the power budget is below the threshold wattage.”
Both the 16-port switch (DH-PFS4218-16GT2GF-240) and the 24-port switch (DH-PFS4226-24GT2GF 360) have two-gigabit uplink combo ports in addition to the PoE ports, and support Layer 2 PoE, PoE+, Hi-PoE, and PoE++. PoE 2.0 switches are available now through all authorised Dahua distributors in North America.
