Bachmann LX800 Modules LX800/DD512/CF512

Technical Dossier

Product Details And Specifications

Bachmann LX800 Series Technical Notes

The Evolution of LX800 Architecture

The Bachmann LX800 platform was introduced as a successor to earlier M1 controller generations, consolidating CPU processing power, I/O density, and fieldbus communication into a unified backplane architecture. Early LX800 deployments relied on dedicated serial communication cards and proprietary Bachmann backplane buses. Subsequent hardware revisions introduced Ethernet-based I/O coupling, PROFIBUS-DP master/slave capability, and CANopen integration. The DD512 digital output module and CF512 digital input/output combination module represent mid-generation I/O expansions designed to increase channel density without expanding rack footprint. Compatibility across LX800 generations is maintained through Bachmann's firmware versioning policy, though certain legacy modules require specific SolutionCenter software versions for full diagnostic support. As the LX800 series has entered its mature/end-of-active-production phase, long-term maintenance support—including spare parts sourcing, repair, and functional testing—has become the primary operational concern for asset owners.

LX800 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the Bachmann LX800 ecosystem, classified by functional category:

CPU / Controller Modules

• LX800: Main CPU controller module; x86-based real-time processor, SolutionCenter-compatible, dual Ethernet ports.
• LX800/CF512: CPU module variant with integrated 512 MB CompactFlash storage for program and data retention.
• LX800/DD512: CPU module variant with 512-channel digital I/O expansion interface, high-density process control.
• LX800/DD512/CF512: Combined CPU with 512-ch digital I/O and 512 MB CF storage; full-featured controller for complex process loops.
• MPC240: Mid-range M1 series CPU; predecessor architecture, compatible with LX800 I/O racks via adapter.
• MPC265: Enhanced MPC-series CPU with extended memory and faster scan cycle; used in parallel with LX800 in mixed installations.

Digital Input (DI) Modules

• DI212: 12-channel 24 VDC digital input module; standard process signal acquisition.
• DI232: 32-channel 24 VDC digital input module; high-density field signal termination.
• DI216: 16-channel digital input, isolated, for high-noise industrial environments.

Digital Output (DO) Modules

• DO212: 12-channel 24 VDC digital output module; relay-compatible actuator control.
• DO232: 32-channel digital output module; used in motor control center (MCC) interfacing.

Analog Input / Output (AI / AO) Modules

• AI204: 4-channel analog input, 4–20 mA / 0–10 V; process variable measurement.
• AI208: 8-channel analog input module; temperature and pressure transmitter interfacing.
• AO202: 2-channel analog output, 4–20 mA; control valve and positioner signal output.
• AO204: 4-channel analog output module; multi-loop PID output for flow and level control.

Communication / Fieldbus Modules

• CM202: PROFIBUS-DP master communication module; connects LX800 rack to field device networks.
• CM203: CANopen master module; used in wind turbine and mobile machine control variants.
• ETH201: Ethernet communication adapter; enables Modbus TCP and OPC-UA connectivity from LX800 rack.

Power Supply Modules

• NT255: 24 VDC rack power supply module; primary power source for LX800 I/O backplane.
• NT256: Redundant power supply module; hot-swap capable, used in high-availability configurations.

Quality Control for the LX800 Range

Bachmann LX800 modules incorporate complex backplane bus interfaces and high-speed digital I/O logic that require specialized test procedures beyond standard power-on verification. DriveKNMS applies the following quality control protocol to all LX800 series units: (1) Backplane bus integrity test using Bachmann-compatible rack simulator to verify slot communication at rated clock speeds. (2) CPU module boot verification under SolutionCenter diagnostic mode, confirming firmware version, memory integrity, and Ethernet port link negotiation. (3) I/O channel functional test for all DD512 digital channels, verifying signal state, isolation resistance, and response latency. (4) CF512 storage media read/write cycle test to confirm data retention and file system integrity. (5) Thermal stress cycling to identify latent component failures in capacitors and voltage regulators common to aged LX800 hardware. Units that do not pass all five stages are quarantined, documented, and either repaired to specification or rejected from inventory.