General Information

Model: 140CPU31110 (standard), 140CPU31110C (conformal coated)

Series: Modicon Quantum (Large PLC/DCS)

Status: Obsolete (Legacy product)

Processor: 32-bit RISC, 66 MHz

Logic Execution Speed: 0.06 μs/boolean instruction

Typical Scan Time: ≤ 0.2 ms/Kinst

Memory

Program Memory: 512 KB RAM (battery-backed)

Data Memory: 256 KB RAM (including retentive area)

Total RAM: 548 KB (program + data)

Battery Retention: ≥ 10 years

Communication Ports (Integrated)

Modbus Plus (MB+): 1 × DB9, 1 Mbps, peer-to-peer network

Modbus RTU: 1 × DB9 (RS-485), master/slave

USB: 1 × front USB (programming/maintenance)

Expansion Slots: 2 (for Ethernet, Profibus DP, etc.)

I/O Capacity

Local Racks: Max 2 (main + expansion)

Distributed I/O (MB+): Up to 63 stations

Remote I/O (S908): Up to 31 stations

Discrete I/O: 8,000 In / 8,000 Out (max)

Analog I/O: 500 In / 500 Out (max)

Electrical & Mechanical

Backplane Current: 1,800 mA @ 5 VDC (≈ 9 W)

Operating Temperature: 0 °C to +60 °C (32 °F to 140 °F)

Storage Temperature: -40 °C to +85 °C

Dimensions: 165 × 110 × 40 mm (6.5 × 4.3 × 1.6 in)

Weight: Approx. 0.75 kg (1.65 lb)

Certifications: CE, UL, CSA, RoHS

Software Compatibility

Programming Software: Unity Pro / EcoStruxure Control Expert

IEC 61131-3 Languages: Ladder Logic, Structured Text, FBD, SFC