Hitachi PLC comes in 2 standard models to suit different applications and needs of customers. The EH-150 series PLC is modular with various module to suit various applications. Number of I/O points can be increased up to 3,520 points using Hitachi's newly launched CPU, EH-CPU548. With the improved CPU, the processing speed is improved to 0.1us/command with an increased program memory of 48k steps. The Micro-EH series PLC is a compact PLC with 12 bit analog I/O, built-in high speed counter, PWM and pulse train output with maximum 140 I/O points.