140CPU43412AC General Information Manufacturer: Schneider Electric Part Number: 140CPU43412AC Series: Modicon Quantum PLC Type: 32-bit Unity CPU Coating: Conformal Coated Supported Software: Unity Pro, Concept Product Status: Discontinued legacy model Core Performance Processor: Intel 80486, 66MHz Total RAM: 1056KB Built-in Flash Memory: 256KB Boolean instruction execution speed: 0.3μs per instruction Hardware watchdog timer: 250ms Built-in real-time clock: Yes 3V lithium backup battery, service life up to 10 years I/O Specification Max local I/O: 64 inputs / 64 outputs Max distributed digital I/O: 8000 inputs / 8000 outputs Maximum remote network drops: 63 Support up to 2 local expansion racks Communication Interfaces 1 x Modbus Plus (MB+) port 2 x Modbus RS232 ports 1 x USB programming service port 2 slots for extended communication modules Electrical Parameters Backplane current consumption: 1.25A @ 5.1VDC Typical power consumption: 6.4W Environmental Conditions Operating temperature: 0°C ~ +60°C Storage temperature: -40°C ~ +85°C Relative humidity: 5%~95% RH, non-condensing Max working altitude: 5000 meters Anti-humidity, dust-proof and anti-corrosion by conformal coating Mechanical Characteristics Occupies: 1 standard slot Hot-swappable: Yes Net weight: approx 0.65kg Main Features Conformal coated design, applicable for harsh industrial environments Larger memory capacity for complex programs and data storage Abundant serial ports to satisfy multi-device communication demands Strong distributed control capability supporting up to 63 remote stations Support redundant hot standby configuration, same version required for redundancy matching Flexible network expansion via reserved communication slots Certifications CE, UL508, CSA C22.2 No.142, FM Class1 Div2, RoHS compliant