Product Short Description
Product Name: Standard 200 Series Power Supply, 400 W, 24 V DC Output
Product Overview: The FPS400-24 is a 400-watt, 24 V DC power supply purpose-qualified for Foxboro DCS Standard 200 Series baseplates and Field Bus Modules (FBM). It is the only Foxboro-tested and qualified power supply for use with 200 Series FBMs. Two input-voltage variants are offered: P0922YU (120/240 V AC or 125 V DC input) and P0922YC (24 V DC input). It can also serve as a field power supply for external field devices.
Description
Technical Specifications:
P0922YU (120/240 V AC or 125 V DC input)
- Input Voltage Range: 85–265 V AC (47–63 Hz) or 108–145 V DC
- Input Current: 5.6 A max at 85 V AC; 2.5 A max at 230 V AC
- Efficiency: up to 95% (typical at 230 V AC)
- Inrush Current: 20 A peak at 110 V AC; 40 A peak at 220 V AC
P0922YC (24 V DC input)
- Input Voltage Range: 18–35 V DC
- Input Current: 19.5 A at 24 V DC
- Efficiency: 81% typical
Common Output
- Output Voltage: 24.0 V DC ±0.2 V (factory set)
- Rated Power: 400 W
- Voltage Regulation: 2.0% line, 2.0% load
- Ripple & Noise: 100 mV p-p; ≤10 mV RMS
- Temperature Coefficient: 0.025% per °C
- Soft-start Time: 3 s typical; 5 s maximum
- Overvoltage Category: Class I, Div 2, Zone 2
- Cooling: Convection (fan-less)
- Approvals: UL, UL-C, CENELEC; G3 grade for harsh environments
- Alarm Output: C-type relay status alarm
Key Features: Wide-range AC/DC auto-selecting input; power-factor correction; two-stage current limiting; over-voltage shutdown; transformer-isolated 24 V DC output; convection cooling with sealed gasketed enclosure; horizontal or vertical DIN-rail mounting; bracket or wall-mount holes; relay status-alarm contact.
Working Principle: AC mains is rectified, PFC-corrected and switched through an isolated transformer to produce a tightly regulated 24 V DC output. Dual-stage current limiting protects against overload, while over-voltage shut-down guards connected FBMs.
Application Scenarios: Powering Foxboro 200 Series baseplates and FBMs; supplying external field devices; Class I, Div 2, Zone 2 hazardous-area installations; harsh-environment (G3) process plants.
Installation Requirements: Install on DIN rail (horizontal or vertical) or by wall-mount bracket; ensure adequate clearance for convection cooling; do not power both field devices and DIN rail baseplates from the same FPS400-24 to preserve system integrity; connect the C-type relay alarm contact to the host system.
Usage Notes: For lower power or smaller footprint, FPS240-24 or FPS120-24 may be used; verify the input variant (P0922YU vs. P0922YC) matches site supply before ordering.
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