Comm Operator NCD Edition is a simplified edition of Comm Operator v2.0. It is a custom-made edition for relay controller boards of National Control Devices (NCD). It is a powerful tool for relay controller boards of NCD. It can detect all COM ports automatically regardless of whether they are real COM ports on motherboard or on supplementary in/output boards, or virtual COM ports created by special drivers. It can send and receive data through COM port. The speed it supports range from 110 to 921600. It supports data input in decimal format which required by relay controller boards of NCD. The propery of Auto Send makes it a full functional device simulator. Device can be used directly without programming. It includes commands for ProXR relay controller boards. It's very convenient to debug or test the relay controller boards. It can keep log of the sent and received data. All setting can be saved to file and loaded later. Unified operating GUI and integrating with F1 help make it easy to use.