Cosel PBA1500F Series AC-DC Power Supplies: PBA1500F-24

Technical Dossier

Product Details And Specifications

Cosel PBA1500F Series: Comprehensive Module Range and Technical Overview

The Cosel PBA1500F series is a line of high-capacity, open-frame AC-DC switching power supplies rated at 1500W continuous output. These units are deployed across global heavy industry sectors including chemical processing plants, nuclear facility auxiliary systems, oil refinery control rooms, and large-scale factory automation infrastructure. The series is designed to operate within harsh industrial environments, offering wide input voltage acceptance (85–264 VAC universal input), forced-air cooling, and compliance with international safety standards including UL 60950-1, EN 60950-1, and CE marking. The PBA1500F series is a preferred choice for system integrators requiring high power density in 19-inch rack or DIN-rail adjacent installations where long-term supply continuity is critical.

The Evolution of PBA1500F Architecture

Cosel introduced the PBA series as a successor to its earlier PBA600 and PBA1000 open-frame lines, progressively scaling output power while maintaining backward-compatible mechanical footprints where possible. The PBA1500F generation introduced full-bridge LLC resonant topology, replacing the earlier hard-switching forward converter designs used in sub-1000W models. This transition delivered measurable improvements in conversion efficiency (typically >88% at full load), reduced EMI signature, and lower thermal stress on primary-side switching components.

Early PBA1500F units targeted 24 VDC and 48 VDC output rails, which remain the dominant bus voltages in industrial PLC backplanes and DCS marshalling cabinets. Subsequent variants extended the output range to cover 5 V, 12 V, 15 V, 28 V, and 36 V rails, addressing a broader range of embedded computing and servo drive auxiliary power requirements. The series incorporates active power factor correction (PFC) as standard, achieving PF >0.98 at rated load, which is a mandatory requirement for grid-connected industrial equipment in the EU and increasingly enforced in Asian manufacturing zones.

Compatibility considerations: PBA1500F units use a standardized 6-pin output connector and remote sense terminals. Integrators migrating from PBA1000F or third-party equivalents must verify output connector pinout and remote sense wiring before direct substitution. The series does not support hot-swap without external OR-ing diode modules.

PBA1500F Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified production and recently-discontinued variants within the Cosel PBA1500F series, classified by output voltage:

24 VDC Output

• PBA1500F-24: 1500W open-frame supply, 24 VDC / 62.5 A output, universal AC input
• PBA1500F-24-N: 1500W, 24 VDC, with N-type remote ON/OFF control signal
• PBA1500F-24-T: 1500W, 24 VDC, conformal-coated PCB for humidity-resistant environments

48 VDC Output

• PBA1500F-48: 1500W open-frame supply, 48 VDC / 31.3 A output, telecom and DCS bus compatible
• PBA1500F-48-N: 1500W, 48 VDC, remote ON/OFF inhibit control variant
• PBA1500F-48-T: 1500W, 48 VDC, conformal-coated for marine and offshore applications

12 VDC Output

• PBA1500F-12: 1500W open-frame supply, 12 VDC / 125 A output, high-current embedded system rail
• PBA1500F-12-N: 1500W, 12 VDC, with remote inhibit signal interface

15 VDC Output

• PBA1500F-15: 1500W open-frame supply, 15 VDC / 100 A output, analog instrumentation bus
• PBA1500F-15-N: 1500W, 15 VDC, remote ON/OFF control variant

28 VDC Output

• PBA1500F-28: 1500W open-frame supply, 28 VDC / 53.6 A output, avionics ground support and military auxiliary

36 VDC Output

• PBA1500F-36: 1500W open-frame supply, 36 VDC / 41.7 A output, servo drive auxiliary rail
• PBA1500F-36-N: 1500W, 36 VDC, remote inhibit control variant

5 VDC Output

• PBA1500F-5: 1500W open-frame supply, 5 VDC / 200 A output, legacy logic bus and embedded backplane

Dual Output / Accessory

• PBA1500F-24-OPT: Factory-configured option board for parallel operation and current sharing between two PBA1500F units

Note: The PBA1500F series has entered the mature/end-of-active-production phase for several output variants. Cosel continues to provide long-term service parts and repair support, but lead times for new units may extend to 16–26 weeks. DriveKNMS maintains buffer stock of the most critical variants to support ongoing maintenance contracts.

Sourcing Hard-to-Find & Obsolete PBA1500F Parts

DriveKNMS operates as a specialist distributor for industrial power supply spare parts, with dedicated inventory management for Cosel PBA-series units. For PBA1500F variants that have transitioned to limited-availability or end-of-life status, DriveKNMS provides the following lifecycle extension services:

• Verified surplus stock sourced from decommissioned plant equipment, with full traceability documentation
• Cross-reference matching for obsolete suffix variants (e.g., -N, -T options) against current production equivalents
• Consignment inventory programs for facilities operating large installed bases of PBA1500F units
• Emergency same-day dispatch for critical plant maintenance scenarios where production downtime costs exceed standard procurement timelines
• Long-term supply agreements (LTA) for facilities requiring guaranteed availability over 3–10 year maintenance windows

All sourced units are accompanied by test reports, date code records, and condition classification (new surplus, refurbished, or exchange).

Quality Control for the PBA1500F Range

The PBA1500F series presents specific quality verification challenges due to its high-current output bus, active PFC stage, and remote sense/inhibit interface circuitry. DriveKNMS applies the following test protocol to all PBA1500F units processed through its facility:

• Input voltage sweep test: Units are energized across the full 85–264 VAC input range at 47–63 Hz to verify PFC stage operation and inrush current limiting
• Full-load output regulation test: Output voltage is measured at 0%, 50%, and 100% rated load using calibrated electronic loads; regulation must remain within ±1% of nominal
• Remote sense verification: Sense terminals are connected to a simulated 500 mΩ cable impedance to confirm compensation range
• Remote ON/OFF inhibit test (for -N suffix variants): Logic-level signal cycling at 1 Hz for 100 cycles to verify relay and optocoupler integrity
• Thermal imaging under load: Infrared scan at 100% load after 30-minute thermal soak to identify abnormal hotspots on primary switching FETs, output rectifiers, and bulk capacitors
• Hipot and isolation test: 3000 VAC input-to-output isolation test per IEC 60950-1 requirements
• Output ripple and noise measurement: Measured per Cosel factory specification using 20 MHz bandwidth-limited oscilloscope with 10 µF // 0.1 µF output termination