Hikvision PoE Power Line Connection with Four Wires35

Introduction

Power over Ethernet (PoE) has become an increasingly popular technology used in modern surveillance systems. It combines data transmission and power supply over a single Ethernet cable, eliminating the need for separate cabling and power outlets. Hikvision, a leading manufacturer in the surveillance industry, offers PoE-enabled devices that support a convenient and cost-effective installation.

Understanding PoE Power Line Connection with Four Wires

In a four-wire PoE connection, two pairs of wires are used for data transmission and power supply, respectively. The two pairs of wires are twisted together to reduce electromagnetic interference. The data pairs are typically designated as Tx+ (Data+) and Tx- (Data-), while the power pairs are designated as PoE+ (Power+) and PoE- (Power-).

Wire Color Code for Four-Wire PoE Connection

Tx+ (Data+): Orange
Tx- (Data-): Orange with white stripe
PoE+ (Power+): Green
PoE- (Power-): Green with white stripe

Types of PoE Standards

There are different PoE standards that define the power levels and pin configurations used in PoE connections. Hikvision PoE devices typically support the following PoE standards:

IEEE 802.3af (PoE)

This standard provides up to 15.4 watts of power over four wires.

IEEE 802.3at (PoE+)

This standard provides up to 30 watts of power over four wires.

IEEE 802.3bt (PoE++)

This standard provides up to 60 watts of power over four wires.

Selection of PoE Cables

The type of PoE cable used in a four-wire connection depends on the PoE standard and power level required. Cat5e, Cat6, and Cat6a cables are commonly used for PoE applications.

Recommended Cable Types

IEEE 802.3af (PoE): Cat5e or Cat6
IEEE 802.3at (PoE+): Cat6 or Cat6a
IEEE 802.3bt (PoE++): Cat6a

Installation Guidelines

To ensure a reliable PoE connection, it is important to follow proper installation guidelines:

Cable Length

The maximum cable length for PoE connections depends on the PoE standard used:
IEEE 802.3af (PoE): Up to 100 meters (328 feet)
IEEE 802.3at (PoE+): Up to 100 meters (328 feet)
IEEE 802.3bt (PoE++): Up to 100 meters (328 feet) for 60W, up to 60 meters (197 feet) for higher power levels.

Connector Type

RJ-45 connectors are used for PoE connections. Ensure that the connectors are properly crimped and secure.

Power Injector

In some cases, a PoE power injector may be required to supply power to the PoE device. The power injector is connected between the network switch and the PoE device.

Benefits of Four-Wire PoE Connection

Four-wire PoE connections offer several benefits for surveillance systems:

Simplified Installation

The use of a single Ethernet cable for both data and power reduces cabling efforts and installation time.

Reduced Costs

Eliminating the need for separate power supplies and cables can significantly reduce installation costs.

Flexibility

PoE connections provide flexibility in device placement, allowing for easy relocation or adjustments without rewiring.

Conclusion

Hikvision PoE power line connection with four wires offers a convenient and cost-effective solution for powering surveillance devices. By understanding the PoE standards, cable selection, and installation guidelines, integrators can ensure reliable and efficient PoE connections. The four-wire PoE connection simplifies installation, reduces costs, and enhances the flexibility of surveillance systems.

2024-10-30

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