Eaton D100CA40 Micro PLC – 40 I/O, 115 VAC Inputs, Triac Outputs

The Eaton D100CA40 is a compact micro programmable logic controller (PLC) from the D100 series, offering 40 integrated I/O points. It is specifically designed for applications requiring direct interfacing with 115 VAC sensors and actuators, thanks to its 115 VAC inputs and triac (AC) outputs. This PLC delivers reliable control in a small footprint, reducing panel space and installation cost.

I/O Configuration

• 24 digital inputs (115 VAC, sink/source)

• 16 digital outputs (triac, 24‑280 VAC, 1 A per point)

• 2 high‑speed counters (up to 10 kHz) for encoder or pulse inputs

• Built‑in 24 VDC sensor supply (400 mA max.)

Key Features

• Integrated power supply: 115 VAC (operating range 100‑240 VAC)

• Program memory: 16 K steps (ladder logic)

• Real‑time clock with battery backup

• PID control capability (up to 8 loops)

• Two communication ports: RS‑232 (programming) and RS‑485 (Modbus RTU)

• Removable terminal blocks for easy wiring

Technical Specifications

Programming and Software

The D100CA40 is programmed using Eaton’s EasySoft software (free download), which supports ladder diagram and function block diagram. The intuitive interface allows quick configuration of I/O, setpoints, and communication parameters. Simulation and online monitoring are included, reducing development time.

Applications

• Packaging machines

• Conveyor control

• HVAC equipment

• Material handling systems

• Small process automation

Advantages of Triac Outputs

Triac outputs provide solid‑state switching for AC loads such as contactors, solenoid valves, and small motors. They offer long electrical life, fast switching, and no contact bounce, making them ideal for frequent on/off operations. The outputs are protected by internal snubber circuits and are fused to prevent damage from overloads.

The D100CA40 is a cost‑effective, all‑in‑one solution for automating machines that operate on standard AC line voltage, simplifying design and ensuring robust performance.