Foxboro FBM201 RH914SQ Redundant Power Supply Module

Product Type: Redundant 24 VDC Power Supply Module for FBM Chassis

Overview:
The Foxboro FBM201 RH914SQ is a redundant power supply module designed to provide reliable 24 VDC power to the Foxboro FBM Series Foundation Fieldbus chassis and all installed modules within it. The “RH914SQ” suffix identifies the specific revision/configuration of the power supply. The module features dual redundant power inputs and outputs for fault-tolerant operation.

Category:
Description

Functional Features:

  • Provides dual redundant 24 VDC outputs to the FBM chassis backplane
  • Accepts dual redundant 120/240 VAC or 24 VDC inputs
  • Includes automatic failover between primary and secondary power sources (< 20 ms transfer time)
  • Features overcurrent protection, overvoltage protection, and short-circuit protection
  • Provides power status monitoring with front-panel LEDs and DCS alarm reporting
  • Supports hot-swap replacement without chassis power-down
  • Delivers 24 VDC ±5% regulated output at up to 25 A total

Technical Specifications:

  • Input Voltage (AC): 100 VAC to 240 VAC, 50/60 Hz (dual redundant inputs)
  • Input Voltage (DC): 20 VDC to 30 VDC (dual redundant inputs)
  • Output Voltage: 24 VDC ±5%
  • Output Current: Up to 25 A total (shared across all FBM modules in chassis)
  • Redundancy: Dual input, dual output — automatic failover < 20 ms
  • Efficiency: ≥ 85% at full load
  • Operating Temperature: 0°C to +60°C (+32°F to +140°F)
  • Protection: Overcurrent, overvoltage, short-circuit, reverse polarity
  • MTBF: > 100,000 hours (at 25°C ambient)
  • Module Format: Standard FBM series full-width or half-width card (depending on chassis)
  • Dimensions: Standard FBM card format
  • Weight: Approximately 1.2 kg (2.6 lb)

Material Composition:

  • Housing: Powder-coated steel with ventilation slots
  • PCB: Multi-layer FR-4 with conformal coating
  • Connectors: Screw-terminal blocks for AC/DC input and DC output
  • Fan: Internal cooling fan (ball bearing, long-life)

Applicable Industries:
Oil and Gas, Chemical Processing, Power Generation, Refining, Mining, Water Treatment

Installation Requirements:

  • Installed in FBM series chassis in a dedicated power supply slot
  • AC wiring connected via terminal blocks (line and neutral for each redundant input)
  • DC output connected to chassis backplane automatically via card edge
  • Must be configured for input voltage range via DIP switches or software
  • Grounding per Foxboro installation manual (chassis ground and protective earth required)

Advantages:

  • True redundant power ensures zero downtime for Fieldbus segment devices
  • Wide input voltage range accommodates global power standards (100–240 VAC)
  • High output current capacity supports large chassis with multiple modules
  • Hot-swap capable enables maintenance without process interruption
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