The ODOT C3351 is a compact, high-performance programmable logic controller (PLC) built on the industry-standard CODESYS V3.5 runtime system. Designed for flexibility and scalability, it adopts a CPU + I/O separated architecture, allowing easy plug-and-play expansion of up to 32 ODOT C-series I/O modules. This makes it an ideal solution for a wide range of industrial automation applications, from mechanical processing and textile machinery to sewage treatment and non-standard automation.

High-Performance Processing

The C3351 delivers fast and deterministic control with a bit instruction cycle of 0.21 µs, word transfer cycle of 0.39 µs, and floating-point operation cycle of 0.42 µs. It provides 1 MB of program memory and 1 MB of data storage, with a 3 KB power-down protection area for critical data retention.

Flexible I/O Expansion

The controller supports up to 32 C-series I/O modules, offering extensive flexibility for system configuration. It is compatible with a wide range of digital and analog I/O modules, temperature modules, and specialty modules, allowing users to tailor the system to specific application requirements.

Comprehensive Communication

The C3351 features 2x RJ45 Ethernet ports (10/100 Mbps) supporting simultaneous Modbus TCP server and client connections, with up to 5 servers/clients each. It also includes 1x RS485 port supporting Modbus RTU master or slave (up to 5 slaves as master, 1 master as slave). The default IP address is 192.168.0.15.

Rugged & Reliable Design

Built for industrial environments, the C3351 operates reliably from -30°C to +70°C and is protected to IP20. It mounts on standard 35mm DIN rail, with compact dimensions of 115 × 65.5 × 75 mm and weight of approximately 120g. The system includes anti-reverse connection protection and system-to-site power isolation.

CODESYS V3.5 Programming

Programming is done via CODESYS V3.5.19.70, compliant with IEC 61131-3 standard. It supports five programming languages: Ladder Diagram (LD), Instruction List (IL), Structured Text (ST), Function Block Diagram (FBD), and Sequential Function Chart (SFC). The controller supports up to 5 state tasks.

Applications

The C3351 is ideal for mechanical processing equipment, sewage treatment systems, textile machinery, non-standard automation, data acquisition, process control, motion control, and energy/building management.