Siemens 6FX1132-1BA01 PCB B84141-A-A40
The Siemens 6FX1132-1BA01 is a printed circuit board (also referenced as B84141-A-A40) used in Siemens industrial automation equipment, particularly in Sinumerik CNC systems and Simodrive drive controllers. This board functions as an interface or control module for signal processing, encoder feedback, and communication between the main controller and power stage.
Board Description
Dimensions: approximately 200 mm x 120 mm, 2.0 mm FR-4 substrate with UL 94V‑0 rating. The board features a 32-bit Infineon C167CR microcontroller (40 MHz) with 512 KB external flash and 128 KB SRAM. Key components include an Altera CPLD (EPM7128) for logic decoding, several optocouplers (6N137) for isolated I/O, and a DC-DC converter (24V to 5V/±15V).
Connectors and Interfaces
2 x 96-pin DIN 41612 backplane connectors for mounting in a Siemens rack.
1 x 15-pin D-sub for resolver/encoder input (Sin/Cos signals).
1 x 9-pin D-sub for RS-232 (service).
1 x 6-pin terminal block for 24V DC supply and digital I/O (4 inputs, 2 outputs).
Functionality
The board is typically used as a resolver-to-digital converter or a pulse encoder interface (TTL/HTL). It processes position and speed feedback from motors and sends data to the CNC CPU via the backplane bus (PROFIBUS or Interbus). It also monitors temperature sensors and generates drive enable signals.
Power and Environment
Supply: 24V DC (20–28V) via backplane or terminal block. Consumption: 5 W. Operating temperature: 0 to 55°C; storage: -25 to 70°C. Humidity: 10% to 90% non-condensing. The board is conformally coated (acrylic) for corrosion protection. Weight: 0.3 kg.
Diagnostic and Status
LEDs: PWR (green), RUN (yellow), ERR (red), and a 7‑segment display for error codes (e.g., E01 = encoder fault). The board includes a watchdog timer that activates a hardware reset if the CPU stops responding.
Compatibility and Use
This PCB is a spare part for Siemens Sinumerik 810D/840D systems and Simodrive 611 power supplies. It is installed in the drive controller cabinet. Before replacement, ensure the firmware version matches (label on board). The board is not hot-swappable.
Ordering and Documentation
Siemens order number: 6FX1132-1BA01 (also B84141-A-A40). The board is supplied in an anti-static bag. Manual: Sinumerik Drive Control Board Manual (6FC5397-0DP10-0AA0).
