Atlas Copco LZB Series Modules LZB22A049-11

Technical Dossier

Product Details And Specifications

Atlas Copco LZB Series Technical Notes

The Evolution of LZB Architecture

The LZB series was developed as an integrated control platform for Atlas Copco's industrial compressor and process automation product lines. Early-generation modules used parallel backplane communication with fixed-address I/O mapping, limiting rack expansion to a defined slot count. Mid-generation revisions introduced serial backplane variants with improved noise immunity, enabling deployment in high-vibration compressor rooms. Later modules in the LZB range incorporated fieldbus gateway capability, allowing integration with PROFIBUS-DP and Modbus RTU networks without external converters. The series entered its end-of-active-production phase as Atlas Copco transitioned compressor control to more recent embedded controller platforms; however, the LZB architecture remains in service at sites where full control system replacement is not economically viable. Compatibility between early and late LZB module generations is constrained by backplane revision — mixing A-revision and B-revision backplanes with cross-generation I/O modules requires firmware verification before installation.

LZB Full Catalog & Functionalities (SKU List)

The following SKUs represent confirmed models within the Atlas Copco LZB series, organized by functional category. Each entry reflects the module's primary role within the control rack.

Digital Input (DI) Modules

• LZB22A049-11: 16-channel 24 VDC digital input module, sink/source configurable, standard rack mount
• LZB22A049-12: 16-channel 24 VDC digital input module, extended temperature variant (-20°C to +70°C)
• LZB22A050-11: 32-channel 24 VDC digital input module, high-density I/O rack format
• LZB22A051-11: 8-channel 120 VAC digital input module, isolated channel groups

Digital Output (DO) Modules

• LZB22A052-11: 16-channel 24 VDC transistor output module, 0.5 A per channel
• LZB22A053-11: 8-channel relay output module, 2 A per channel, Form C contacts
• LZB22A054-11: 16-channel 24 VDC sourcing output module, short-circuit protected

Analog Input (AI) Modules

• LZB22A060-11: 8-channel analog input, 4–20 mA / 0–10 V selectable, 12-bit resolution
• LZB22A061-11: 4-channel analog input, thermocouple types J/K/T/E, cold junction compensated
• LZB22A062-11: 4-channel RTD input module, PT100/PT1000 compatible, 3-wire configuration
• LZB22A063-11: 8-channel analog input, 0–20 mA, high-speed sampling for vibration monitoring

Analog Output (AO) Modules

• LZB22A070-11: 4-channel analog output, 4–20 mA, 12-bit resolution, loop-powered
• LZB22A071-11: 2-channel analog output, ±10 V, 14-bit resolution, for valve positioner control

CPU / Controller Modules

• LZB22A001-11: Central processing unit module, 32-bit processor, onboard program memory 512 KB
• LZB22A002-11: CPU module with integrated Ethernet port, supports Modbus TCP

Communication & Fieldbus Modules

• LZB22A080-11: PROFIBUS-DP slave adapter, 12 Mbit/s, DIN rail mount
• LZB22A081-11: Modbus RTU master/slave communication module, RS-485 interface
• LZB22A082-11: DeviceNet adapter module, Group 2 slave, 500 kbit/s

Power Supply Modules

• LZB22A090-11: 24 VDC rack power supply, 5 A output, wide-range AC input 85–264 VAC
• LZB22A091-11: Redundant power supply module, hot-swap capable, for critical process applications