Atlas Copco PME-1802-A-CD2

Core Technical Specifications

• Operating Power Supply: 24VDC industrial control power input, power consumption ≤12W
• Analog Input Channels: Multi-channel 4–20mA inputs for pressure transducers, temperature sensors, flow transmitters
• Digital I/O Channels: Relay output channels for inlet valve control, unloader valve, cooling fan, alarm light; digital input for emergency stop, door interlock, pressure limit switches
• Control Regulation Precision: Compressed air system pressure regulation accuracy ±0.1 bar under stable air demand
• Supported Control Modes: Fixed speed load/unload cycle control, VSD variable speed continuous pressure modulation, auto energy-saving standby mode
• Communication Interfaces: RS485 Modbus RTU port for SCADA remote monitoring, local HMI display interface connector
• Operating Temperature Range: 0°C ~ +65°C compressor internal electrical cabinet environment
• Humidity Tolerance: 5%–90% non-condensing relative humidity
• Physical Mounting: Panel-mounted rectangular module for compressor electrical cabinet internal installation
• Safety Compliance: CE industrial machinery safety standard, ISO 1217 compressed air equipment certification

Function & Performance Features

1. Real-time closed-loop pressure control algorithm dynamically matches compressor air output to factory real-time air consumption demand
2. Multi-level equipment protection logic: High compressor oil temperature shutdown, high motor winding temperature, low oil pressure, air filter blockage alarm, emergency stop interlock
3. Automatic service maintenance timer counter tracks running hours for air filter, oil separator, lubricant oil and dryer replacement reminder
4. Historical fault event storage archives over 50 fault records with timestamp for maintenance troubleshooting, including over-temperature, pressure deviation, motor overload
5. Built-in energy optimization algorithm automatically enters low-power standby mode during extended zero air demand periods to cut idle power waste
6. Modbus RTU communication interface transmits real-time operating data (discharge pressure, running hours, power consumption, fault status) to factory central SCADA system
7. Local parameter configuration via connected Atlas Copco HMI panel: adjustable pressure setpoints, load/unload hysteresis, VSD speed range, service interval timers
8. Anti-surge protection logic prevents compressor internal surge damage during sudden sharp reduction in factory air demand

Working Principle

Material & Structural Composition

• Outer enclosure: Flame-retardant ABS plastic sealed housing with IP40 front panel protection against compressor cabinet dust
• Internal control PCB: Conformal coated FR4 circuit board to resist oil mist and mild condensation inside compressor electrical cabinets
• Signal terminal blocks: Screw-type plastic insulated terminal blocks separated into analog signal, digital power and communication wiring zones
• Core electronic components: Wide-temperature microprocessor, high-precision analog signal isolation amplifiers, surge suppression TVS arrays for sensor input protection

Installation Requirements

1. Mount inside compressor electrical cabinet on vertical mounting plate; avoid direct airflow from compressor cooling fan blowing onto the controller surface
2. Separate high-current motor power wiring and low-level sensor signal wiring with minimum 30cm distance to reduce electrical noise interference
3. All analog sensor cables must use shielded twisted pair cable with single-point shield grounding at controller terminal side
4. Maintain cabinet internal ambient temperature below 65°C; install auxiliary cabinet cooling fan for high-temperature workshop environments
5. Tighten wiring terminal screws with torque 0.6–0.8 N·m to prevent loose contact caused by compressor unit vibration

Typical Application Scenarios

• Manufacturing factory fixed speed and VSD screw air compressor control systems
• Automotive assembly workshop centralized compressed air station master control units
• Food & beverage production plant oil-injected screw compressor automation controllers
• Pharmaceutical cleanroom low-oil compressed air unit monitoring and regulation
• Construction machinery factory multi-compressor air supply coordination control

Mandatory Operation & Maintenance Precautions

1. Cut off compressor main power supply before opening controller cabinet wiring terminals for maintenance work
2. Regularly clean controller front panel dust accumulation every 3 months to avoid blocking ventilation gaps
3. Do not install the PME-1802-A-CD2 in direct proximity to compressor oil separator components to prevent oil mist PCB contamination
4. Backup all user-configured pressure and service parameters to HMI memory before controller replacement
5. If pressure regulation instability occurs, first inspect analog pressure transducer calibration and shield cable integrity
6. Strictly prohibit modifying internal PCB circuit components to bypass factory safety shutdown interlock logic
7. When multiple compressors operate in parallel, configure separate pressure hysteresis parameters to avoid frequent load/unload cycling conflict between units