Introduction

ADAM-4000 RS-485 Input Output modules are essential components for industrial automation systems that require reliable communication between various devices. This versatile technology has revolutionized the way electronic devices communicate with each other in various industries, particularly in factories and plants.

RS-485 supports inexpensive local networks and multidrop communications links, using the same differential signaling over twisted pair as RS-422. It is generally accepted that RS-485 can be used with data rates up to 10 Mbit/s^[a] or, at lower speeds, distances up to 1,200 m (4,000 ft).^[2] As a rule of thumb, the speed in bit/s multiplied by the length in metres should not exceed 10⁸. Thus a 50-meter cable should not signal faster than 2 Mbit/s.^[3]

Benefits of RS-485

Input Output modules offers long transmission distances, high noise immunity, low power consumption, and the ability to connect multiple devices. These benefits can positively impact the performance of an automation system, and how they can increase productivity in a wide spectrum of applications.