Power Electronics

PoE Interface Modules Drive 10-W Loads

C&D Technologies’ has launched a family of fully integrated powered device (PD) interface modules for power-over-Ethernet (PoE) applications. The NMPD series of compact power extraction modules feature on-board dc-dc conversion and provide a full IEEE802.3af-compliant data and power interface to an Ethernet line, including short-circuit protection.

The NMPD modules are ideal for PoE designs in applications ranging from security equipment and public address systems to remote environmental monitoring, telemetry and industrial control. Operating with a maximum output power rating of 10 W, the modules extract power from a CAT5 twisted pair Ethernet cable when sourced by IEEE802.3af-compliant power sourcing equipment (PSE). Each module integrates data isolation transformers, PSE handshaking and signature control functionality, and a UL-approved dc-dc converter delivering an isolated dc output voltage.

The new modules work with a nominal 48-V input voltage and are available with isolated output voltage options of 3.3 V, 5 V, 12 V and 15 V. Isolation is rated at 1500 Vac (for one minute). NMPD modules are supplied in a vertically mounted SIP form factor with dimensions of 91.8 mm x 25.1 mm. Unit pricing is less than $18 in OEM quantities.

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