Welcome to my quick review of an inexpensive 2-channel 5V relay module controlled via RS485 bus utilizing Modbus RTU protocol. As claimed by some online sellers, this easy-to-get Modbus RTU 2-Channel ...

The SRM Safety Relay Module has been certified by exida for single use in Safety Instrumented Systems up to SIL 2. The relay repeater module accepts single contact closure inputs from logic solver ...

Designed specifically to comply with updated ISO 13849 Safety Category 2 requirements, this safety relay module helps users economically apply better and more appropriate safety measures. DC Velocity ...

What is the point of reviewing a cheap timer module, especially if it is based on the ubiquitous ... Those aren’t here. Next, a 5V relay is wired between the output of the timer chip and the ground ...