Siemens 6SE7031-7HG84-1JA1 SIMOVERT MASTERDRIVES PSU1 Power Supply Card
Het item werd toegevoegd aan uw offerteaanvraag
Product Information
The Siemens 6SE7031-7HG84-1JA1 is an internal switch-mode power supply card, designated as model PSU1, manufactured for the SIMOVERT MASTERDRIVES inverter family. Installed directly within the drive chassis, this component operates directly off the drive's main DC link within a broad voltage range of 510 V DC to 890 V DC. It steps down the primary DC link power into regulated, isolated low-voltage secondary outputs of +5V, +15V, -15V, and +24V DC. These secondary power rails are critical for operating internal drive electronics, including Vector Control (CUVC) and Motion Control (CUMC) units, gate driver circuits, pulse triggers, and integrated option modules across industrial automation applications.
Interfacing with internal drive hardware through a multi-pin PCB header, the 6SE7031-7HG84-1JA1 serves as a direct hardware board replacement when restoring a faulted drive. Because it functions purely as an internal power distribution section, commissioning a replacement unit requires no software parameterization or firmware loading. Mechanics and electronics line up directly with the original factory installation. When replacing a damaged board, service engineers can transfer the hardware directly, relying on ABC Industrial Parts for tested replacement stock to rapidly restore operating capabilities without replacing the entire drive assembly.
Drive health and secondary voltage distribution can be verified directly on the unit or via host drive diagnostics. Onboard +5V / +24V status LEDs provide immediate feedback on active auxiliary rails, where an unlit indicator during operation signals an internal board fault or blown fuse. Additional troubleshooting can be performed using multimeter measurements across secondary output test points or through the host drive's PMU seven-segment display and OP1S operator panel. When internal component degradation causes persistent supply or system errors, internal circuit repairs are not field-serviceable, making a replacement board from ABC Industrial Parts the standard resolution to bring the machine back online.
Technical Specifications
| Manufacturer | Siemens |
| Part Number | 6SE7031-7HG84-1JA1 |
| Model / Type | PSU1 |
| Product Family | SIMOVERT MASTERDRIVES |
| Component Type | Power Supply Board |
| Input Voltage Range | 510 - 890 V DC |
| Secondary Output Voltages | +5, +15, -15, +24 V DC |
| Internal Interface Type | Multi-pin PCB Header |
| Lifecycle Status | Discontinued |
Diagnostics and Status Indication
The 6SE7031-7HG84-1JA1 board incorporates built-in visual diagnostics that allow technicians to assess internal secondary DC power states immediately upon applying main power. Onboard diagnostic LEDs monitor the status of the secondary DC voltage rails. When the supply outputs are functioning correctly, these LEDs remain steadily illuminated. An off state while the main DC link is energized indicates an internal supply board failure, secondary circuit short, or blown board fuse.
For precise diagnostic evaluation, maintenance staff can verify individual voltage levels (+5V, +15V, -15V, and +24V DC) using multimeter probes applied directly to secondary output test points on the board. Furthermore, hardware power failures on the PSU board trigger corresponding diagnostic fault indications on the main drive display panel, such as the PMU seven-segment interface or an attached OP1S operator panel.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| +5V / +24V Supply LEDs | Solid / Off | Indicates active internal secondary DC voltages generated by PSU1 for control electronics. An off condition while powered indicates an internal board fault or blown fuse. |
Replacement and Spare Part Considerations
Replacing a defective power supply card in a SIMOVERT MASTERDRIVES system requires confirming that the original unit matches the part number 6SE7031-7HG84-1JA1 and model designation PSU1. Because this card connects directly to high-voltage DC link circuitry operating between 510 V DC and 890 V DC, standard drive isolation safety procedures must be observed before physical removal or installation.
Installing a replacement PSU1 card is a hardware-only process. No parameter sets, software tools, or control unit reconfigurations are required after installation, as the board contains no program memory or variable parameter settings. Once the mechanical physical installation and internal multi-pin header connections are completed, the board automatically supplies regulated power to the control board (CUVC or CUMC) and pulse trigger circuits upon drive power-up.
When diagnosing recurring fault codes such as F023 or F061 despite normal incoming line power, board-level component failure is the primary cause. In these scenarios, replacing the damaged internal PSU board restores full drive functionality, avoiding the high cost and labor associated with replacing the complete frequency inverter assembly.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| F001 | Main undervoltage / DC link undervoltage | DC link voltage fell below the undervoltage threshold. | Line voltage failure, input phase loss, pre-charging circuit fault, or defective DC link measurement section on PSU board. | Check line supply voltage and input fuses. Inspect pre-charging resistors and PSU power supply card. |
| F002 | Main overvoltage | DC link voltage exceeded maximum threshold value. | Regenerative energy from motor deceleration, line voltage spike, or faulty DC voltage sensing circuit. | Check braking resistor/chopper or deceleration ramp times. Verify DC link voltage measurement on PSU board. |
| F023 | Power section supply fault | Internal electronic supply failure or driver power supply failure detected. | Failure of internal power supply board (PSU1), defective ribbon cable connection, or short circuit in 24V/15V control circuits. | Check internal cable connections between PSU and control board. If fault persists with correct input DC link voltage, replace PSU1 card. |
| F061 | System error | Internal hardware or communication failure within drive unit electronic boards. | Internal hardware fault, unrecoverable board voltage collapse, or control board defect requiring repair. | Internal board hardware failure — check auxiliary power voltages and replace damaged PSU or CU board. |
Frequently Asked Questions
Does replacing the 6SE7031-7HG84-1JA1 power supply board require software programming or parameter transfer?
No. The 6SE7031-7HG84-1JA1 is a pure hardware switch-mode power supply board. It contains no parameter memory or programmable firmware, so replacing a failed unit requires no software parameterization.
Which SIMOVERT MASTERDRIVES systems are compatible with this power supply card?
This PSU1 power supply card is compatible with Siemens SIMOVERT MASTERDRIVES Compact and Chassis units, supporting both Vector Control (CUVC) and Motion Control (CUMC) configurations.
What primary input voltage is required for the PSU1 board to operate?
The board draws power directly from the main drive DC link within an operating voltage range of 510 V DC to 890 V DC.
What output voltages does the 6SE7031-7HG84-1JA1 generate?
The card generates isolated secondary auxiliary DC voltages of +5V, +15V, -15V, and +24V DC to power control electronics, gate drivers, and option modules.
What does fault code F023 on a MASTERDRIVES drive indicate?
Fault code F023 indicates an internal power section supply fault, which commonly points to a failure of the internal PSU1 power supply board, a loose internal cable connection, or a short circuit on the secondary voltage control rails.
Take advantage of our exchange formula
A defective product does not have to be worthless. At ABC Industrial Parts, you can hand in defective products and immediately benefit from a discount on your new purchase. This is a smart way to save money while contributing to a circular economy.
Play it safe with our warranty conditions
Industrial plants prefer to keep running invariably, no matter what. Therefore, it is essential that you can rely on high-quality products and/or sustainable repairs. With our warranty conditions, you can count on certainty, whether you choose new, used or repaired products.
Data backup and recovery
Have you lost valuable parameters or data due to a malfunction while the manufacturer no longer provides support? At ABC Industrial Parts, we help you secure this data, both for common and specific products.
Specific firmware and hardware versions
If you are working with specific hardware or firmware versions that are no longer available from the manufacturer, ABC Industrial Parts is your partner. When making your enquiry, clearly state which versions you need, we will then look at the possibilities of supplying those versions, so that your installations continue to function optimally.
Disclaimer:
We are not an authorised distributor of Siemens.
Product photos are for illustration purposes only and may differ from the actual product delivered.
Some of the content on this page was created with the help of AI. While we strive to provide accurate and up-to-date information, errors may occur.