Description
Core Product Summary (Brand / Model / Key Attributes)
The Foxboro FPS400-24 is a 400 W DIN-rail mounted power supply that delivers regulated 24 V DC to Standard 200 Series baseplates in the Foxboro I/A Series distributed control system. It is agency-certified for Class I Division 2 and Zone 2 hazardous-area applications.
Two input variants are available: P0922YU (85–265 V AC or 108–145 V DC) and P0922YC (18–35 V DC). The unit features high efficiency, active power-factor correction, dual-stage current limiting, overvoltage shutdown, and a transformer-isolated 24 V DC output. These are the only power supplies tested and qualified by Foxboro for use with 200 Series Fieldbus Modules (FBMs).
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | DIN-rail mounted 24 V DC power supply |
| Model | FPS400-24 |
| Common Part Numbers | P0922YU (AC/DC input), P0922YC (DC input) |
| Rated Output Power | 400 W |
| Output Voltage | 24.0 V DC ±0.2 V (factory set) |
| Maximum Output Current | Approximately 16.7 A at 24 V |
| Input Voltage (P0922YU) | 85–265 V AC or 108–145 V DC (125 V DC nominal) |
| Input Frequency | 47–63 Hz |
| Input Voltage (P0922YC) | 18–35 V DC (24 V DC nominal) |
| Efficiency (typical) | Up to 92 % at 230 V AC |
| Current Limiting | Dual-stage, limited to 110 % of rated load |
| Overvoltage Shutdown | Factory set at 28.0 V DC |
| Isolation | Transformer-isolated output |
| Hazardous Area Rating | Class I Division 2 / Zone 2 |
| Mounting | Horizontal or vertical DIN rail; panel mount option |
Detailed Product Overview
The Foxboro FPS400-24 supplies the regulated 24 V DC required by Standard 200 Series baseplates and associated Fieldbus Modules in Foxboro I/A Series (now EcoStruxure Process Expert) systems. It is specifically qualified by the manufacturer for this application; other power supplies are not approved for use with 200 Series FBMs.
The P0922YU variant accepts a wide AC input range (85–265 V) or a 125 V DC nominal supply, while the P0922YC variant operates from a 24 V DC source. Active power-factor correction on AC inputs produces a near-sinusoidal current waveform. Dual-stage current limiting protects both the supply and the connected load: if output current exceeds approximately 110 % of rated value, the voltage is reduced to limit power delivery. An independent overvoltage circuit shuts the output down if the voltage rises above the factory-set threshold of 28 V DC.
The output is transformer-isolated from the input, providing electrical separation and reduced noise transfer. The module supports horizontal or vertical DIN-rail mounting and can also be panel-mounted. Agency certifications include UL, UL-C and CENELEC listings for Class I Division 2 and Zone 2 locations, making the unit suitable for many process-industry control cabinets.
Because the FPS400-24 is the only power supply formally tested and qualified for 200 Series FBM baseplates, it is the specified replacement and expansion unit for existing I/A Series installations that use these modules.
FPS400-24
FPS400-24
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Host System | Foxboro I/A Series / Standard 200 Series baseplates and FBMs | Only power supply qualified by Foxboro for these modules |
| Input Variant | P0922YU (AC or 125 V DC) or P0922YC (24 V DC) | Select according to available plant power |
| Output | Regulated 24 V DC to baseplate power bus | Direct connection to 200 Series baseplate power terminals |
| Mounting | 35 mm DIN rail (horizontal or vertical) or panel mount | DIN-rail clamp may be required for vertical orientation |
| Redundancy | Parallel operation supported | Use appropriate isolation or diode modules when paralleling |
| Hazardous Area | Class I Division 2 / Zone 2 certified | Confirm local certification requirements |
Engineering Selection Highlights
- 400 W continuous rating at 24 V DC → provides sufficient capacity for multiple 200 Series FBM baseplates.
- Wide AC/DC input range (P0922YU) → allows connection to common plant power sources without additional converters.
- Transformer-isolated 24 V output → reduces conducted noise and improves ground-loop immunity.
- Dual-stage current limiting and overvoltage shutdown → protects both the power supply and downstream electronics.
- Class I Division 2 / Zone 2 certification → permits installation in many hazardous-area control rooms.
- Manufacturer-qualified for 200 Series FBMs → ensures compatibility and avoids unsupported configurations.
- DIN-rail mounting (horizontal or vertical) → simplifies installation and replacement in standard control cabinets.
Dimensions, Mounting & Connection Notes
- Mounting options: horizontal or vertical DIN rail; panel-mount brackets available
- Cooling: convection (no forced-air fan required under normal conditions)
- Input and output connections: terminal blocks suitable for field wiring
- Status indication: typically includes power-OK and fault signaling (exact LED functions depend on revision)
- Housing: designed for industrial control-cabinet environments
(Exact external dimensions and connector pin-outs are defined in the official Foxboro product specification PSS 41H-2FPS400 and the DIN-rail subsystem user’s guide.)
FAQ
What is the Foxboro FPS400-24?
It is a 400 W DIN-rail mounted power supply that provides regulated 24 V DC to Standard 200 Series baseplates in Foxboro I/A Series systems.
Which input voltages are supported?
The P0922YU version accepts 85–265 V AC or 108–145 V DC. The P0922YC version accepts 18–35 V DC.
What is the output rating?
Factory-set 24.0 V DC ±0.2 V at up to approximately 16.7 A (400 W continuous).
Is it approved for hazardous areas?
Yes. It is agency-certified for Class I Division 2 and Zone 2 applications.
Can it be used with 200 Series Fieldbus Modules?
Yes. These are the only power supplies tested and qualified by Foxboro for use with 200 Series FBMs.
How is the unit mounted?
It mounts on a standard 35 mm DIN rail (horizontal or vertical orientation) and can also be panel-mounted.
What protection features are included?
Dual-stage current limiting (to 110 % of rated load), overvoltage shutdown (factory set at 28 V DC), and transformer isolation of the output.
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