Bachmann SLC284 Safety Processor Module

Product Overview

The Bachmann SLC284 is a high-performance safety CPU designed for safety-critical industrial applications. Fully compliant with IEC 61508 and supporting up to SIL3 / PL e / Cat 4, it integrates seamlessly into the Bachmann M1/M200 controller system. Featuring a 1-out-of-2 (1oo2) hardware architecture with two independent 32-bit microcontrollers, the SLC284 ensures maximum fault tolerance and extremely fast response times, making it ideal for wind turbine control, maritime automation, and complex factory safety systems.

Technical Specifications

• Manufacturer: Bachmann Electronic

• Part Number: SLC284

• Safety Certification: IEC 61508 SIL3, EN ISO 13849-1 PL e, Category 4

• Microprocessors: Dual 32-bit independent microcontrollers (1oo2 architecture)

• Digital Inputs: 16 Safety Inputs (Sink/Source)

• Digital Outputs: 8 Safety Outputs (Redundant pairs supported)

• Program Cycle Time: 5 ms

• Operating Modes: SAFE, PROG, TEST, ERROR (Selectable via physical switch)

• Communication: FASTBUS, Bus Expansion, CAN, and Bluecom

• Isolation: Galvanic isolation between I/O groups and system bus

• Programming: Bachmann SolutionCenter (Safety Developer)

• Status Display: Integrated LED display for channel and system status

Key Features

• Dual-Channel Hardware Architecture: The processor utilizes two separate 32-bit CPUs that monitor each other and the application logic simultaneously. This redundancy is essential for achieving SIL3/PL e ratings, as it allows the system to detect internal hardware failures and transition to a safe state.

• Fast Logic Execution: With a fixed 5 ms safety cycle time, the SLC284 can react to emergency stops or light curtain breaks faster than standard PLCs, minimizing the "safety distance" required for machine guarding.

• Flexible Decentralized I/O: Supports remote safety modules (such as SDI208 or SDO204) over FASTBUS or Bluecom. These modules can be located hundreds of meters away, allowing for a single safety processor to manage an entire production line or wind farm.

• Fail-Safe Outputs: The 8 digital outputs are designed for high-integrity switching. When used in redundant pairs, they meet the highest safety category requirements for driving contactors and STO (Safe Torque Off) inputs.

• Integrated Diagnostics: The front-panel display provides immediate feedback on the operating mode and specific error codes, significantly reducing downtime during troubleshooting or commissioning.