Name: ABB 1SFB536068D1001 Low Voltage CPU Control Board for PST/PSTB Soft Starters - MASSIVE
SKU: ABB 1SFB536068D1001

ABB 1SFB536068D1001 Low Voltage CPU Control Board for PST/PSTB Soft Starters

Brand ABB

Model ABB 1SFB536068D1001

The ABB 1SFB536068D1001 is a low-voltage CPU control printed circuit board developed by ABB as the central intelligent component inside its PST and PSTB families of solid-state soft starters. Rather than being a generic interface card, the ABB 1SFB536068D1001 functions as the starter’s control brain: it receives start, stop, and parameter-change commands from the front keypad or an upstream PLC/DCS, samples three-phase current and main-circuit voltage, calculates the six-pulse thyristor firing angles, and drives the gate-pulse circuitry that shapes the motor terminal voltage throughout the acceleration and deceleration ramps. In the ABB soft-starter architecture this board therefore links the power electronics to the control system, turning a simple “run” command into a precisely timed soft-start sequence.

Built around an embedded industrial microcontroller, the ABB 1SFB536068D1001 executes the motor protection state machine, manages ramp profiles and current limits, records fault history, and supervises communication with external devices. It is a board-level assembly rather than a complete module with housing and front connector, which is why it is normally handled as a spare part for in-cabinet replacement. Its positioning is that of a service-critical component for medium-power ABB soft starters, where restoring smooth starting, controlled stopping, bypass changeover, and integrated protection matters more than raw switching capacity.

The ABB 1SFB536068D1001 is typically associated with PST units in the 110–160 kW class and PSTB units in the 200–315 kW class. Because ABB uses material-index revisions to track hardware spins, the board’s full code, the starter’s BOM and the loaded firmware should all be checked before substitution; the related ABB 1SFB536068D1011 is not automatically a one-for-one replacement.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	1SFB536068D1001
Manufacturer	ABB
Product Type	Low Voltage Soft Starter CPU Control PCB
Compatible Families	ABB PST / PSTB intelligent soft starters
Typical Power Range	PST: 110–160 kW; PSTB: 200–315 kW
Core Function	Thyristor firing-angle calculation, ramp control, protection logic, communication
Processor	Embedded industrial microcontroller
Analog Inputs	Three-phase current sensing; main-circuit voltage sensing
Analog Conversion	Internal ADC-based acquisition
Communication	RS-485; Modbus RTU / ASCII; optional fieldbus coupling depending on variant
Protection Functions	Overload, overcurrent, phase loss/unbalance, locked rotor, underload, over-temperature, PTC supervision
Current Limit Setting	Approx. 1.5–7 × rated motor current, adjustable by starter model
Control Supply	Soft starter internal low-voltage / control rail
PCB Construction	Industrial-grade FR-4 base, multi-layer, three-proof surface treatment
Operating Temperature	Approx. -25 °C to +70 °C for wide-temperature variants; standard variants typically -10 °C to +55 °C
Storage Temperature	-40 °C to +85 °C
Enclosure Protection	IP20 board assembly; protection depends on soft starter enclosure
Installation	Internal guide/slot location with connector and screw fixing
Compatibility Note	Interchangeability with D1011 and other revisions must be verified against the soft starter BOM/firmware

Main Features and Advantages

The primary strength of the ABB 1SFB536068D1001 is that it concentrates measurement, control, protection, and communication in one purpose-built board. By sampling three-phase current and voltage and calculating the thyristor firing pattern digitally, the board enables smooth acceleration from an initial kick voltage up to full mains voltage, helping limit inrush current and mechanical shock. This is particularly useful for pumps, fans, compressors, conveyors, crushers, and other high-inertia or high-starting-current loads where direct-on-line starting would stress the motor, coupling, gearbox, and supply network.

Protection is built into the control strategy rather than added as an afterthought. The ABB 1SFB536068D1001 supports overload and overcurrent protection, phase-loss and phase-unbalance detection, locked-rotor supervision, underload detection, and thermal monitoring. Where the application uses motor PTC thermistors, the board can also process temperature-sensor input. The stored fault and event records simplify troubleshooting, since maintenance staff can identify whether a trip came from the process, the motor, cabling, or the starter itself.

Communication is another practical advantage. The ABB 1SFB536068D1001 provides serial interfacing for Modbus RTU/ASCII and can be linked to keypads, PLCs, and automation networks through the appropriate starter options. This allows remote configuration, start/stop command handling, status feedback, and alarm reporting rather than relying solely on local controls.

From a service perspective, the ABB 1SFB536068D1001 offers a clean board-level repair path. When a PST/PSTB unit repeatedly reports control or communication faults, replacing the complete starter is often unnecessary if the power semiconductors and gate-drive section are sound. The board’s industrial PCB construction, conformal coating or protective finish, and dedicated control-rail design make it suitable for cabinet environments, while its defined compatibility range prevents mismatched fitment across the soft-starter range.