RS-485 is known for its ruggedness and reliability, but there’s one invisible problem that can silently destroy your devices—Common Mode Voltage (CMV). 🔍 What is Common Mode Voltage?CMV is the voltage difference between the ground of two connected devices. In an ideal world, all grounds would be at exactly 0V relative to each other. But …
Read more “💥The Silent Killer of RS-485 Networks: Common Mode Voltage.”
After yesterdays post on the differences between RS232 and RS485, we have been asked a few times why RS485 is more noise immune. It is because RS485 uses a differential signalling method. Here’s how it works, and why it’s effective: 🔗 Differential Signalling in RS485: RS485 uses two wires to carry a pair of signals that …
RS232 and RS485 are standards for serial interfaces that each specify the transmission media and a defined set of logic levels, data rates and timings. These are some of the oldest serial interfaces around, yet they are still very widely used in control and measurement equipment, mainly due to their simplicity and low cost. RS232: …