ATTO controlSYS ATTO-CPU44 PLC with DU-01, PD025, PVU-2424

The ATTO controlSYS ATTO-CPU44 is a versatile programmable logic controller designed for small to medium automation projects. This package includes the CPU44 main unit, DU-01 operator display, PD025 power supply, and eight ATTO-xx I/O modules (types may vary), plus a PD025 and PVU-2424 auxiliary unit, providing a complete control solution.

ATTO-CPU44 Controller Specifications

• CPU type: 32-bit RISC processor, scan rate 0.2 µs per instruction

• Program memory: 128 KB (expandable to 512 KB via SD)

• Digital I/O capacity: 24 inputs / 16 outputs (built-in)

• Expansion: Up to 8 ATTO-xx modules (digital, analog, temperature, etc.)

• Communication ports: RS-232, RS-485 (MODBUS RTU master/slave), CANopen optional

• Real-time clock and battery backup

DU-01 Display Unit

The DU-01 is a 2-line x 16-character LCD display with backlight. It connects via a simple ribbon cable to the CPU44 and allows viewing of register values, alarm messages, and operator prompts. Six tactile keys (F1-F4, ESC, ENT) enable menu navigation and parameter entry without an external HMI.

PD025 Power Supply

The PD025 is a DIN-rail mounted 24V DC power supply delivering 25W (1.04A). Input range 100–240V AC, efficiency >85%. It features overload, short circuit, and overvoltage protection. It is specifically sized to power the ATTO-CPU44 and up to four I/O modules.

PVU-2424 I/O Module

The PVU-2424 is a mixed I/O expansion unit: 24V DC digital inputs (8 channels) and relay outputs (8 channels, 2A per point). It also includes 2 analog inputs (0-10V or 4-20mA). The module connects via the ATTO expansion bus, requiring no external power.

Programming and Software

Programming is done with ATTOsoft IDE (free download), supporting Ladder Diagram and Instruction List. The software includes a simulator and online debugging with real-time variable monitoring. Program transfer via RS-232 or USB-to-RS232 adapter.

Typical Applications

This system is ideal for small packaging machines, conveyor control, greenhouse automation, HVAC control panels, and educational training rigs. The modular design allows cost-effective scaling.

Environmental and Compliance

Operating range: 0–55°C, IP20 rating, CE and RoHS compliant. The PLC series is designed for panel mounting.

Conclusion

The ATTO controlSYS ATTO-CPU44 combined with DU-01, PD025, and PVU-2424 offers a ready-to-use automation solution for small control systems, balancing functionality, ease of use, and compact footprint.