General
Total PoE power	120 W
Packet buffer	768 kbit
MTBF	1.289.258 Stunden

The EDS-P206A-4PoE-MM-ST-T is an industrial, unmanaged Ethernet switch from the brand Moxa, designed for use in demanding environments with extreme temperature conditions. It combines robust network connectivity with the ability to power PoE-capable devices such as IP cameras, access points, or industrial sensors directly via the network cable. The combination of four 10/100BaseT(X) PoE ports and two 100BaseFX multimode fiber optic connections with ST connectors enables flexible and reliable network integration in industrial facilities, particularly in areas where high mechanical stress, extreme temperatures, or non-climate-controlled enclosures prevail.

Applications
This switch is specifically designed for industrial applications requiring high operational reliability and long service life. It is suitable for use in manufacturing, rail transport, energy supply, or outdoor surveillance technology. The operating temperature range of -40 to 75 °C makes it suitable for non-climate-controlled environments where other network devices might fail. The integrated PoE function enables power supply to end devices without additional power sources, simplifying installation and reducing maintenance.

Functions and Features in Detail
The switch features four RJ45 ports, each supporting 10/100BaseT(X) and equipped with PoE. The PoE technology is based on IEEE 802.3af/at standards and provides a maximum power output of 30 W per port, with a total power budget of 120 W. The pinout follows Endspan, Mode A (pins 1, 2 for V+, pins 3, 6 for V-). The two fiber optic connections are implemented as 100BaseFX multimode ports with ST connectors, enabling stable, interference-free data transmission over longer distances. The ports support Auto-Negotiation and Auto MDI/MDI-X, allowing automatic adaptation to connected devices.

Technology Explained Simply
The switch operates using the Store-and-Forward method, where entire data packets are received, checked, and then forwarded. This ensures high data integrity. The packet buffer size is 768 kbit, providing sufficient buffer capacity for processing data packets. The MAC address table contains 2048 entries, sufficient to manage a large number of devices in the network. Power supply is via a removable 4-pole terminal block and supports an input voltage of 12 to 57 VDC, with redundant power supply possible. The maximum power consumption is 13.2 W (without PoE load). Protection features such as reverse polarity protection and overcurrent protection safeguard the device against misuse or voltage surges.

Compatibility and Accessories
The switch is compatible with PoE-capable end devices supporting IEEE 802.3af/at standards. The fiber optic connections allow interfacing with other multimode fiber devices supporting 100BaseFX. ST connectors are standard in industrial applications. The 12–57 VDC power supply enables use with various industrial power sources. Certifications including UL 508, CISPR 32, FCC Part 15B Class A, EN 55032/24, as well as IEC 61000-4-2 to -4-8 (for ESD, RS, EFT, Surge, CS, PFMF) and IEC 60068-2-6/-2-27/-2-31 (for vibration, shock, drop) confirm suitability for industrial environments.

Mounting and Installation
The device is delivered in a metal housing with IP30 protection rating. Mounting is done via DIN rail, with optional wall mounting available. Dimensions are 50.3 mm (width) × 114 mm (height) × 70 mm (depth), and the weight is 375 g. The compact design allows flexible placement in enclosures or on walls. Installation involves connecting the power supply via the terminal block and connecting network devices via the RJ45 and fiber optic ports.

Operational Advantages
The switch offers high reliability due to robust construction, wide operating temperature range, and integrated protection features. The PoE function reduces the need for additional power supplies and simplifies installation. Support for redundant power supplies increases network availability. The long MTBF of 1,289,258 hours (according to Telcordia) and the 5-year warranty highlight the device’s longevity and reliability. The combination of Ethernet and fiber optic connections enables a flexible network architecture suitable for both short and long-distance connections.

Protection rating, operating temperature, PoE, and multimode fiber optic are the key features defining the switch’s suitability for industrial environments. The IP30 protection rating protects against solid foreign objects, the operating temperature of -40 to 75 °C enables use in extreme environments, the PoE technology powers end devices via the network cable, and the multimode fiber optic connections provide stable, interference-free data transmission over long distances.