Pioneer Magnetics PM3398B-6P-1-3P-E | Industrial PSU, Replacement Unit

Description

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Pioneer Magnetics PM3398B-6P-1-3P-E

Pioneer Magnetics PM3398B-6P-1-3P-E

3. Key Technical Specifications

4. Product Introduction

The PIONEER MAGNETICS PM3398B-6P-1-3P-E is a compact, 3-phase input power supply that delivers 24V DC at 10A—a workhorse for industrial control panels. It takes 380–480V AC directly from plant power, eliminating the need for step-down transformers, and provides a regulated, isolated DC bus for PLCs, I/O racks, relays, and HMIs. The suffix 80026-172-23 denotes a specific manufacturing configuration—check the label for the exact firmware version and terminal configuration.

Here is the catch: this unit uses active power factor correction and a synchronous rectification topology to achieve 91% efficiency, which means it generates significantly less heat than older ferroresonant designs—important when you are packing multiple supplies into a sealed enclosure. The 30 ms hold-up time is generous for industrial environments, keeping your controller alive through momentary brownouts. And because it is convection-cooled, there is no fan to fail, making it a solid choice for harsh, dusty environments where moving parts are a liability.

Pioneer Magnetics PM3398B-6P-1-3P-E

5. Application Scenarios & Field Experience

Part 1 – Narrative Paragraph

The silent killer in plant automation is not a control logic bug—it is DC bus instability. I have walked into panel shops where the 24V rail is sitting at 21.8V because an undersized power supply cannot handle the inrush of a dozen contactors pulling in simultaneously. The PLC stays on, but the analog outputs drift, and the HMI flickers. The PM3398B-6P-1-3P-E solves that with a stiff load regulation (±0.3%) and a peak current capability that handles 12A for 4 seconds—long enough to energize all your coils without collapsing the bus. The adjustable output range (22.5–28.5V) also lets you set the voltage to compensate for long DC distribution runs.

Part 2 – Numbered List (Application Scenarios)

1. Automotive Assembly – PLC Control Cabinets – The PM3398B powers a Siemens S7-1500 PLC, distributed I/O via Profinet, and 24V DC contactors for conveyor drives. The 3-phase input reduces the upstream transformer requirement and balances the phase load.
2. Water/Wastewater – SCADA RTU Panels – Deployed in remote pump stations, the supply accepts 480V AC directly from the utility step-down. The -25 °C cold-start capability ensures reliable winter operations, and the ATEX Zone 2 rating (on select variants) allows installation in mild gas environments.
3. Material Handling – Automated Storage & Retrieval Systems (AS/RS) – The 10A capacity powers the control computer, sensor arrays, and motor brake coils in a single cabinet. The 30 ms hold-up prevents fault resets during crane bridge voltage dips.
4. Pharmaceutical – Batch Control Panels – The low ripple (50 mVpp) is critical for 4–20mA analog loops that feed bioreactor temperature and pH controllers. The remote sense feature is connected to the field termination block to compensate for 24V drop across long cable runs.

Part 3 – Short Field Story

A bottling plant in the Midwest had a frustrating problem: every time the shrink-wrap tunnel’s three-phase heater bank cycled on, the 24V DC bus would dip to 20V for 50 ms—just enough to cause a random PLC watchdog reset. The plant had replaced the PLC, the I/O, and the wiring. They had not looked at the power supply, a 5A unit that was undersized from day one. We spec’d the PM3398B-6P-1-3P-E for its 10A capacity and 30 ms hold-up. After installation, the bus voltage stayed flat at 24.2V through the heater cycle. The plant’s downtime dropped by 80% that month.

Pioneer Magnetics PM3398B-6P-1-3P-E

6. Standard Operating Procedure (SOP) for Quality Control

Every unit goes through an industrial-grade QC process:

• Visual & Origin Inspection – We verify the Pioneer Magnetics label, the 80026-172-23 revision marking, and the date code. We check the terminal blocks for damage and inspect the PCB for conformal coating consistency. We reject units with burn marks or reworked solder joints.
• Input Safety & Dielectric Test – A 3000V AC hipot test is applied between input and output for 60 seconds. Leakage current must be below 5 mA. We also test the input-to-ground isolation at 1500V AC.
• Power-Up & Inrush Measurement – The unit is powered up through a 3-phase variac. We measure the inrush current—it must stay below 15A peak. The soft-start relay should bypass the inrush thermistor within 500 ms.
• Voltage Accuracy & Trim Adjustment – At no load, we measure the output. If it deviates from 24.0V ±0.5%, we adjust the internal trim pot. We document the final trim setting.
• Load Regulation & Transient Test – We step the load from 0A to 10A and back using electronic loads, measuring the voltage deviation. Overshoot must be < 2% and settling time < 1 ms. We also test the peak current capability by applying a 12A pulse for 4 seconds.
• Ripple & Noise Measurement – With a 20 MHz bandwidth oscilloscope, we measure ripple at 10% load and 100% load. It must stay below 50 mVpp. We test the remote sense loop by adding 0.5V of cable drop compensation.
• Protection Circuit Verification – We short the output through a shunt to verify current limiting engages between 11A and 13A. We force an overvoltage condition to test the crowbar latch-off. Thermal shutdown is verified by running at 110% load until the internal temperature reaches 95 °C—the unit must shut down and recover at 80 °C.
• ESD-Safe Packaging – The module is placed in an anti-static bag, wrapped with conductive foam, and packed in a corrugated carton with “Industrial Electronics” handling labels. All terminal covers are secured.

Pioneer Magnetics PM3398B-6P-1-3P-E

7. Frequently Asked Questions (FAQ)

Q1: What is the 80026-172-23 suffix? Does it matter for compatibility?

A: The suffix identifies the specific manufacturing build—it may indicate terminal type (screw vs. push-in), connector orientation, or a firmware revision for the remote on/off logic. For 95% of installations, any -6P-1-3P-E with a compatible terminal style will work. However, if your system expects a specific remote on/off signal behavior (e.g., active high vs. active low), check the label. We document the exact revision for each unit and can verify its configuration before shipping.

Q2: Can I parallel two units for N+1 redundancy?

A: Yes, but with an important caveat. The units support active current sharing via pin 6 of the control connector. However, for true N+1 redundancy and protection against a single-point failure, you must install external Schottky OR-ing diodes on the output of each unit. Without them, a shorted output diode in one supply can backfeed and drag down the whole bus. We recommend a 20A 100V Schottky diode module per unit.

Q3: The has no fan. Is that a problem for my cabinet?

A: No—convection cooling is a feature, not a flaw. The unit is designed to dissipate its heat through the finned heatsink. However, you must derate the output current if your ambient temperature exceeds 60 °C—above 60 °C, reduce the load linearly to 70% at 70 °C. Ensure the heatsink has at least 2 inches of clearance on all sides for airflow. Mounting it directly above a hot drive can push it over the derating curve.

Q4: What is the warranty, and what does it cover?

A: We provide a 12-month warranty from the date of shipment covering manufacturing defects—failure to regulate, output voltage loss, overvoltage protection faults, and input-stage failure under normal conditions. It does not cover damage from connecting 480V AC to the 24V output (reverse polarity), water ingress, physical damage, or operation outside the derating curve. We ship every unit with a test report and a thermal imaging snapshot taken at full load.

Q5: The remote on/off pin is confusing—how do I wire it?

A: The remote on/off is an opto-isolated input. It accepts a 5–24V DC signal. Pin 1 is the anode (signal +), and pin 2 is the cathode (signal –). Apply a voltage between 5V and 24V to turn the output ON (or OFF, depending on the setting—check the unit’s label for “active high” or “active low”). If you are not using remote control, short pins 1 and 2 together (for active low) or leave them open (for active high). Do not apply 24V to these pins if the unit is configured for 5V logic—check the label. We include a wiring diagram with every shipment.

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