Power Supply Over Ethernet Module
The EKE-Trainnet® Power Supply Over Ethernet (PSE) module supplies 48 V DC output power to the EKE-Trainnet® Ethernet Switching Unit (1U ESU), enabling its Power-over-Ethernet (PoE) functionality.
Key Features
The EKE-Trainnet® PSE is used to power up the PoE output on the EKE-Trainnet® 1U ESU. In practice, one PSE provides power to 4 Ethernet ports on the 1U ESU. When using two EKE-Trainnet® 1U ESU simultaneously, the EKE-Trainnet® PSE can provide power to both of them, and provide a total of 8 ports.
When the input supply voltage is below the set minimum value, EKE-Trainnet® PSE minimises current consumption in order to prevent the deep discharge of train batteries.
The output voltage of the EKE-Trainnet® PSE is 48 V DC. The input voltage can be 36-52 V DC (PSE2524A) or 110 V DC (PSE2217B). The EKE-Trainnet® PSE can provide a maximum power output of 62 W to be split between the powered ports: for example, 15.4 W for 4 ports or 7 W for 8 ports.
The EKE-Trainnet® PSE grace supply function enables the module to continue working for a short period of time when the power is cut off. The PSE module withstands 10 ms input power breaks without disrupting any of the normal operations (Voltage Supply Interruption as per EN50155 Class S2 and Supply change over as per EN50155 Class C1).
The EKE-Trainnet® PSE has built-in circuitry to detect and control the input current in the event of a power-up. Controlling the in-rush current prevents component damage.
The EKE-Trainnet® PSE works only together with the EKE-Trainnet® Ethernet Switch Supply (ESS) module which takes power from the train batteries and transfers it to the EKE-Trainnet® PSE.
Options
When external PoE devices consume low power (Class 1, 0.44 – 3.54 W), the EKE-Trainnet® PSE Bypass Unit (PBU) can be used. The PBU draws power from the PSE module and distributes it to an additional 4 ports (or 8 ports with two 1U ESU modules). Up to two PBU modules can share the PSE’s 62W output across 12 ports, or up to 24 ports when using a second 1U ESU.
