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Non-Redundant Fieldbus Power Supplies

Supplier: MTL Instruments

The MTL5995 isolated power supply has become the established industry standard for fieldbus networks. Fieldbus power supply isolation protects against communication errors resulting from crosstalk between fieldbus segments and more than one earth fault resulting in the failure of multiple segments.

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The MTL-Relcom FPS-DT or the FPS-D Dual Power Supply powers two independent fieldbus segments. They consist of a Dual Coupler base and two plug-in Isolated Power Modules. The function of the Dual Coupler Base is to:
  • Bring in two sources of input 24 VDC power
  • Provide the mechanical mounting and the electrical connection for two Isolated Power Modules
  • Provide network cable connection to the Host and to the network’s field segment for each fieldbus segment
  • Monitor the power supply and segment operation and generate an alarm in case of failure
Two Isolated Power Modules, or IPMs, plug into the base. Each provides galvanically isolated, fieldbus-conditioned power to its fieldbus segment. Each IPM can provide up to 350 mA at a minimum of 25 V dc of power.

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