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Key Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | ABB |
| Product Name | SDCS-POW-1 COAT Power Supply Board |
| Part Number | 3ADT220090R0003 |
| Compatible Drives | ABB DCS500 / DCS500B / DCS501B / DCS502B series DC drives |
| Board Function | Auxiliary/control power supply for DCS500 control section |
| Typical Output | 24V DC control voltage (verify against OEM datasheet) |
| Input Range | Typically 100-240V AC auxiliary supply (verify per cabinet wiring) |
| Associated Boards | SDCS-CON-x, SDCS-PIN-xx, SDCS-IOB-x, SDCS-FEX-x |
| Mounting | Internal control board, mounted inside DCS500 control module |
| Condition | New surplus, stock, or refurbished tested |
| Warranty | 12 months |
| OEM Status | Discontinued; verify compatibility before replacement |
Product Introduction
ABB SDCS-POW-1 COAT 3ADT220090R0003 is the auxiliary power supply board used in ABB DCS500-series thyristor DC drives. It provides control-section power for boards such as SDCS-CON-x, SDCS-PIN-xx, and SDCS-IOB-x, and is commonly replaced when the drive reports auxiliary undervoltage or control-power faults.This board is not a universal 24V power supply. It belongs to the DCS500 control stack and must match the cabinet revision, flat-cable wiring, and associated control boards. Because the DCS500 platform is discontinued, replacement units should be verified by part number, revision, and functional test rather than by外形 or label alone.
Installation & Configuration Guide
Preparation (10 min)
- Record the drive nameplate: DCS500 model, serial number, and software/firmware revision.
- Photograph all board labels, ribbon-cable positions, and jumper settings.
- Confirm the replacement board shows 3ADT220090R0003 and SDCS-POW-1 COAT.
- Prepare an ESD wrist strap, insulated tools, and a multimeter.
Removal (5–10 min)
- Stop the drive and disconnect main AC supply.
- Wait for DC bus discharge; verify with a multimeter before touching terminals.
- Disconnect auxiliary control power.
- Label and disconnect ribbon cables and power connectors.
- Remove mounting screws and withdraw the board.
Installation (10 min)
- Compare the new board against the old one for revision, connector count, and jumper positions.
- Install the board into the same slot and secure mounting hardware.
- Reconnect ribbon cables exactly as photographed.
- Verify no bent pins, loose connectors, or foreign debris inside the cabinet.
Power-On & Test (10 min)
- Restore auxiliary control power first, without main power.
- Check that control LEDs indicate normal power-up.
- Measure 24V DC control outputs at designated test points if accessible.
- Restore main power only after control power is stable.
- Clear faults, verify no F1 Auxil. Undervoltage, and run a no-load test.
Troubleshooting Quick Reference
| Symptom | Likely Cause | First Check |
|---|---|---|
| F1 Auxil. Undervoltage | Failed SDCS-POW-1 or auxiliary supply loss | Measure auxiliary AC input and 24V DC output |
| Drive does not power up | Control power missing or board failed | Verify XPOW/auxiliary connector and fuses |
| Intermittent control faults | Loose ribbon cable or oxidized connector | Reseat SDCS-CON-x / SDCS-PIN-xx cables |
| Repeated fault after replacement | Wrong revision or incompatible board | Compare 3ADT220090R0003 revision and COAT marking |
| Burnt smell or discolored PCB | Internal component failure | Do not re-energize; replace and inspect upstream supply |
| F14 Speed Meas. Fault | May involve SDCS-POW-1, SDCS-CON-x, or feedback | Check encoder supply, cables, and control board seating |
Dimensions, Mounting & Wiring Notes
- Dimensions: Not confirmed from available references. Measure the original board before ordering.
- Mounting: Internal DIN/module-mounted board inside the DCS500 control section.
- Connectors: Ribbon cables to SDCS-CON-x and related control boards; auxiliary AC/DC power connectors vary by cabinet revision.
- Wiring: Do not force connectors. Ribbon-cable orientation must match the original.
- Verification: Always confirm terminal layout against the existing board and ABB DCS500 hardware manual.
FAQ
Will SDCS-POW-1 COAT 3ADT220090R0003 fit my DCS500B?
It typically fits DCS500 / DCS500B control sections, but revision compatibility must be checked. A mismatched revision can cause communication faults or incorrect power sequencing.I replaced the board but still get F1 Auxil. Undervoltage. What now?
Check the auxiliary AC supply, cabinet fuses, connector seating, and downstream boards. The fault may come from the supply feed, SDCS-CON-x, or a shorted control board rather than the new POW-1 itself.Is this board still available new from ABB?
No. The DCS500 platform and its control boards are discontinued. Supply comes from surplus stock or refurbished tested units. Lead time depends on inventory.Can I use a generic 24V power supply instead?
No. SDCS-POW-1 is integrated into the DCS500 control architecture. A generic supply will not match the connector layout, voltage rails, sequencing, or safety isolation.What should I check before paying for a replacement?
Ask for clear photos of the label, revision, connectors, capacitors, and PCB surface. Confirm the part number 3ADT220090R0003, warranty terms, and whether the unit has been functionally tested.Do you test these boards before shipping?
Function is verified under test conditions when testing is specified. Typical checks include visual inspection, insulation check, auxiliary power-up, output voltage measurement, and connector verification. A full DCS500 load test requires a compatible drive cabinet.
