Description
IDEC PF3S-PSA2 | FA-3S Series PLC Power Supply Module Specs
Architect’s Product Breakdown
The IDEC Izumi PF3S-PSA2 serves as a foundational power conversion module designed specifically for the IDEC FA-3S programmable logic controller rack platform. Engineered to convert incoming industrial AC line power (100 to 120 VAC / 200 to 240 VAC at 50/60 Hz) into a clean, regulated 12 VDC bus voltage at up to 2.0 Amperes (2000 mA), this hardware model supplies internal logic rail power for the central processor (such as the PF3S-CP12), local memory modules, and expansion I/O racks.
Occupying the dedicated power slot on an FA-3S rack base, the module incorporates heavy-duty line filtering, a 20 ms momentary power interruption hold-up time, and robust noise suppression circuitry to protect microprocessors from grid transients. When installing or retrofitting this model in active machine control cabinets, electrical technicians must ensure the protective frame ground (FG) terminal is securely wired with a minimum 2.0 mm^2 conductor to guarantee complete galvanic noise isolation and maintain the unit’s 1500 VAC dielectric isolation barrier.
PF3S-PSA2
Key Technical Specifications
- Manufacturer: IDEC Izumi Corporation
- Product Category: PLC System Rack Power Supply Module
- Part Number / Catalog No.: PF3S-PSA2
- PLC Compatibility: IDEC FA-3S Series Programmable Controller Racks
- Rated Input Voltage: 100 to 120 VAC / 200 to 240 VAC (50/60 Hz, allowable 48 to 63 Hz)
- Allowable Voltage Variation: -15% to +10%
- Max Power Consumption: 85 VA
- Rated DC Output: 12 VDC \pm 5\% at 2.0 A (2000 mA)
- Inrush Current: Maximum 40 A peak
- Dielectric Strength: 1500 VAC for 1 minute (between power/IO terminals and Frame Ground)
- Insulation Resistance: Minimum 10 M\Omega (500 VDC megger)
- Allowable Power Interruption: Maximum 20 ms hold-up at full rated load
- Weight: Approximately 2.34 kg (5.16 lbs)
Field Engineer’s Pitfall Guide (Unique Value)
- Hot-Swapping Under Load: Never insert or unseat the PF3S-PSA2 power supply module while the main AC line power is active. Disconnecting the module live can induce severe inductive arcing across the internal backplane bus connectors, destroying sensitive CPU memory chips and I/O driver ICs.
- Improper Frame Ground (FG) Wiring: Leaving the FG terminal ungrounded or daisy-chaining it with noisy VFD or servo ground leads introduces common-mode electrical noise into the 12 VDC logic backplane. Always run a dedicated green ground wire (\ge 2.0 mm^2) directly to the central cabinet star-ground point (100\,\Omega max resistance).
- Exceeding 12 VDC Total Backplane Current Draw: The PF3S-PSA2 supplies a maximum of 2000 mA (2.0 A) to the rack. Adding high-density analog or specialized communication cards without calculating total backplane power requirements will cause voltage sag, triggering unexpected CPU brownout resets.
QA & Testing SOP (Transparency)
- Visual & Origin Verification: Units undergo microscopic examination to confirm clean connector terminal contacts, undamaged housing latches, unbent backplane pins, and authentic OEM labeling.
- Live Bench Power & Regulation Testing: Modules are mounted on an FA-3S test rack supplied via an adjustable AC autotransformer (Variac) across 100–240 VAC ranges. Output regulation is evaluated under full 2.0 A simulated electronic load.
- Dielectric Isolation & Hold-Up Diagnostic: Technicians test dielectric strength at 1500 VAC between power terminals and FG, verify insulation resistance (>10 M\Omega), and simulate brief AC power interruptions to confirm the 20 ms hold-up specification.
- Anti-Static Packaging: Post-testing units are fitted with protective connector covers, sealed in conductive ESD shielding bags, and cushioned in high-density foam packaging to prevent mechanical or electrostatic damage during transit.
Technical FAQ
Can I hot-swap the IDEC PF3S-PSA2 module while the PLC chassis is energized?
No. Hot-swapping is not supported on the FA-3S rack backplane. Always switch off primary AC line power before removing or replacing the power module.
What is the output voltage and current rating for this specific model?
The PF3S-PSA2 provides a regulated 12 VDC output rated at 2.0 Amperes (2000 mA).
How does the PF3S-PSA2 differ from the PF3S-PSA1 model?
While both accept standard AC inputs, the PF3S-PSA1 yields a lower output rating of 12 VDC at 1.25 A (50 VA), whereas the provides a higher output capacity of 12 VDC at 2.0 A (85 VA).
What is the standard warranty status for surplus inventory units?
Verified surplus or factory-sealed PLC power modules typically carry a 12-month operational warranty covering material and manufacturing defects under standard operating conditions.
