140CPU43412U (Modicon Quantum Unity CPU)

General

• Manufacturer: Schneider Electric

• Part No: 140CPU43412U

• Series: Modicon Quantum

• Type: Unity Processor, 80486, 66 MHz

• Coating: Standard (non-conformal)

• Programming: Unity Pro

• Status: Discontinued / Legacy

• Note: U = “Universal”, enhanced firmware, larger memory vs. 140CPU43412

Core & Memory

• Processor: 32-bit 80486, 66 MHz

• RAM: 1056 KB (program + data)

• Flash: 256 KB

• Boolean Speed: ~0.3 µs/instruction

• Watchdog: 250 ms (hardware)

• RTC: Yes

• Battery: 3 V lithium, 1.2 Ah, 10 years life

I/O Capacity

• Local I/O: 64 In / 64 Out (max)

• Distributed I/O: 8000 In / 8000 Out (digital)

• Remote Drops: 63 max

• Local Racks: 2 max (main + extension)

Communication Interfaces

• 1 × Modbus Plus (MB+) RS485 (DB9)

• 2 × Modbus RS232 (DB9)

• 1 × USB (programming/service)

• 2 expansion slots (Ethernet/Profibus DP etc.)

Electrical

• Backplane Current: 1.25 A @ 5.1 VDC

• Power Consumption: ~6.4 W

Environmental

• Operating Temp: 0 °C ~ +60 °C

• Storage Temp: −40 °C ~ +85 °C

• Humidity: 5–95% RH, non-condensing

• Altitude: Up to 5000 m

Mechanical

• Slot: 1 slot (Quantum backplane)

• Hot Swap: Yes

• Weight: ~0.65 kg

Key Features

1. 1056 KB RAM (same as 43412A/AC, larger than 43412’s 896 KB)

2. Standard coating (non-conformal; choose 43412UC for conformal coating)

3. 1×MB+ + 2×RS232 + USB, rich serial resources

4. Supports up to 63 remote stations, strong distributed capability

5. 2 expansion slots for flexible network extension

6. Redundancy: Match with 43412U only (same firmware family)

Certifications