Description
ABB 1SFB536068D1011 Main Board for Soft Starter Main Control Board
[Product Positioning]
1SFB536068D1011 is the core Main Board/Main Control Board in ABB’s Soft Starter series, and is a key replacement component for ABB’s PST/PSTB/PSE/PSR and other soft starter product lines. This motherboard integrates all the control logic, triggering algorithms, protection functions, and communication interfaces of the soft starter, serving as the “brain” of the soft starter. When the original motherboard fails, this board can be directly replaced for quick repair without the need to replace the entire soft starter.
[Core Function]
This motherboard simultaneously undertakes tasks such as thyristor trigger control, motor protection, soft start/soft stop logic, bypass contactor management, and communication. Built in dual processor architecture: one processor is dedicated to real-time triggering algorithms (ensuring precise conduction angle control of six anti parallel thyristors), while the other processor manages communication, HMI interaction, and event recording, without competing for resources. All protection function blocks are independent of each other, with their own independent set values and data records.
[Protection Function]
Overcurrent protection: Three phase overcurrent (50/51), using timed or IDMT inverse time characteristics for low setting segments, timed or instantaneous characteristics for high setting segments, and timed or instantaneous characteristics for instantaneous periods. Support 15 optional IDMT inverse time curves to ensure selective coordination with upstream fuses.
Ground fault protection: Non directional ground fault (50N/51N), low setting range, high setting range, transient period. Suitable for effective grounding, resonant grounding (arc suppression coil), and low resistance grounding networks.
Thermal Overload Protection (49): Three phase cable thermal overload protection, supporting cable thermal overload model (TOL3Cab), with thermal model accuracy of ± 2% of full scale. Optional PTC input to monitor motor winding temperature.
Rotor blockage protection: detects motor blockage status and triggers tripping.
Phase imbalance protection (46): Current imbalance protection.
Underload protection: Motor light load operation detection.
Reverse phase protection: power phase sequence error detection.
Controllable silicon (thyristor) protection: detects thyristor fault status.
Soft start and soft stop control
Startup modes: voltage ramp startup, current limiting startup, torque control startup, and jump startup (used to overcome static friction).
Soft parking: The voltage gradually decreases to achieve smooth parking, especially suitable for applications such as water pumps, effectively preventing damage to pipelines and equipment caused by the “water hammer” effect.
Bypass contactor control: After the start-up is completed, the bypass contactor will automatically close, short-circuit the thyristor and exit operation, reduce heat loss, and extend the service life of the soft starter (PSTB series built-in bypass contactor, directly driven by the motherboard).
Initial voltage setting: The starting voltage level of the startup curve can be set (30% to 70% of the rated voltage).
Current limiting function: The starting current is limited to 2-5 times the rated current of the motor, which can effectively prevent overcurrent tripping during starting.
Measurement and Monitoring
Measure three-phase current, zero sequence current, three-phase voltage, zero sequence voltage, frequency, and power factor.
Supports pulse counting input (7 pulse counting input ports).
Display electrical quantity information as a single value.
Measurement accuracy: Current/voltage ± 0.5%.
Support demand value calculation.
Built in event recorder, recording the last 20 event codes with time stamps, setting values, waveform data, automatic reclosing times, and protection start/trip times.
[Communication Interface]
The reserved interface for fieldbus communication can support multiple bus protocols through ABB bus adapters
Supported protocols: Modbus TCP/RTU, Profibus DP (via adapters such as CI854), DeviceNet, Profinet, etc.
Supports RS-485 serial communication.
Front panel communication: used for local parameter setting and diagnosis.
Supports multilingual LCD display (10 languages including Chinese, English, etc.).
[I/O Configuration]
Digital input: Multi channel DI, used for start/stop commands, external fault signals, bypass contactor status feedback, etc.
Digital output: Multi channel DO, used for trip output, bypass contactor drive, operation status indication, fault alarm, etc.
Analog input: Current/voltage feedback signal input.
Analog output: 4-20mA/0-10V output, used for external instrument display or higher-level system monitoring.
All channels are provided with electrical isolation, which can effectively suppress common mode spike interference of the frequency converter.
[Physical Specifications]
Size: Standard soft starter motherboard size, suitable for internal installation of PST/PSTB/PSE/PSR series soft starters.
Installation method: Plug in plug-in design, compatible with the standard internal bus interface of the soft starter, supports hot plugging (must be operated in a power-off state).
Working temperature range: -25 ° C to+70 ° C, storage temperature -40 ° C to+85 ° C.
Auxiliary power supply: Powered by the internal bus of the soft starter, no external power supply is required.
Typical power consumption: ≤ 5W.
Fanless design, no electrolytic capacitors, normal coating coated board, maintenance free long-term operation.
Front panel protection level: IP20 (compatible with cabinet up to IP54).
[Applicable models]
Mainly compatible with ABB’s following soft starter series:
PST series (30A~1050A, external/internal)
PSTB series (370A~1050A, built-in bypass contactor, DIN rail installation)
PSE series (18A-370A, entry-level)
PSR series (3A~105A, compact)
PSTX series (enhanced for specific applications)
Comparison with the same series
1SFB536068D1011: Main Board, core control+trigger+protection, this product.
1SFB536068D1013: Drive low-voltage input/output module (I/O Module), focusing on on-site I/O expansion.
1SFB536068D1001: Digital output terminal board, focusing on output relay expansion.
The electrical interfaces of each board are consistent, the software is compatible, and can be selected as needed.
Certification and Standards
Compliant with IEC 60255, IEC 61000 series electromagnetic compatibility standards, CE, cULus, UL 508, DNV marine certification. Complete KEMA type testing. HS code 853701190. Origin Switzerland.
[Typical Application]
Soft start/soft stop of water pump: prevent water hammer effect and protect pipeline system.
Fan soft start: reduce the impact of starting current on the power grid.
Applications of AC motors such as compressors, conveyors, mixers, crushers, ball mills, etc. that require limited starting current and torque.
