General
PoE power	30 W
Input voltage	24/48 VDC
Power consumption (without PDs)	4,08 W
Air humidity	5–95 % (nicht kondensierend)
MTBF	2.525.278 Stunden

The INJ-24 from Moxa is a Gigabit PoE+ injector that supplies network-enabled end devices with power and data over a single Ethernet cable. It supports the IEEE 802.3af/at standards and delivers up to 30 W of power per port, making it suitable for power-hungry devices such as IP cameras, access points, or industrial controllers. The unit features two RJ45 connectors: one data port and one PoE port, both supporting Gigabit Ethernet (10/100/1000BaseT(X)). The Auto-MDI/MDI-X and Auto-Negotiation functions enable flexible and compatible connections, regardless of the connection configuration. The PoE technology uses pins 4, 5, 7, and 8 (Midspan, Mode B) for power transmission, simplifying integration into existing networks.

Applications

The INJ-24 is specifically designed for industrial applications where robust and reliable power delivery over the network is required. It is suitable for environments with high demands on operational safety, such as factories, logistics centers, or outdoor surveillance systems. The -T variant extends the application range with an operating temperature range of -40 to 75 °C, making it suitable for extreme environmental conditions as well. Storage is possible in the range of -40 to 85 °C, with humidity levels between 5 and 95 % (non-condensing).

Functions and Equipment in Detail

The injector is connected to a DC power source via a 3-pole removable terminal block, which must be in the range of 24 to 48 VDC. The operating voltage is 22 to 57 VDC, offering high flexibility in power supply. The current draw is 1.42 A at 24 VDC, and the power consumption without connected end devices is maximum 4.08 W. Integrated protection functions such as overcurrent and reverse polarity protection increase safety and prevent damage to the device or connected components.

Technology Explained Simply

PoE technology (Power over Ethernet) enables the transmission of power and data over the same Ethernet cable, eliminating the need for separate power supply lines. The INJ-24 operates as a Midspan injector, meaning it can be integrated into existing networks without requiring the network switches to have PoE capability. The maximum output power of 30 W per port corresponds to the PoE+ standard (IEEE 802.3at), designed for power-intensive devices. The total power of the device is also 30 W, meaning only one device can be supplied with full power at a time.

Compatibility and Accessories

The INJ-24 is compatible with all devices supporting the IEEE 802.3af/at standard. Connections are made via standard RJ45 connectors, enabling easy and quick integration into existing networks. DIN rail mounting allows for secure and space-saving installation in enclosures or control cabinets. The IP30 protection rating protects against contact with moving parts and against solid foreign objects, but is not intended for outdoor use or in damp environments.

Mounting and Installation

Mounting is done via a DIN rail, enabling quick and secure installation in industrial enclosures. The compact plastic housing with dimensions 24.9 x 100 x 86.2 mm and a weight of 115 g is easy to handle. The terminal block is removable, simplifying installation and maintenance. The integrated protection functions ensure the device remains undamaged even in case of misuse or voltage fluctuations.

Operational Advantages

The INJ-24 provides reliable and low-maintenance power supply for network devices in industrial environments. The high MTBF (Mean Time Between Failures) of 2,525,278 hours according to Telcordia SR332 underscores the longevity and reliability of the device. The 5-year manufacturer’s warranty offers additional security for the operator. The combination of compact design, easy mounting, and comprehensive protection functions makes the INJ-24 a practical solution for PoE integration into existing networks.

Certifications and Safety

The device complies with safety standards UL 508 and EN 62368-1, ensuring electrical safety. EMC and EMS certifications (EN 55032/24, CISPR 32, FCC Part 15B, IEC 61000-4-2 to -4-8) guarantee low electromagnetic emissions and high immunity against electromagnetic interference. Additional environmental tests according to IEC 60068-2-31 (free fall), -2-27 (shock), and -2-6 (vibration) confirm the mechanical robustness of the device.

Scope of Delivery

The scope of delivery includes the INJ-24 PoE+ injector, a quick start guide, a product test certificate (in Chinese), a product notice (in Chinese), and a warranty card. These documents provide basic information for installation and operation of the device.