RM1A23D25 is a voltage monitor relay manufactured by Carlo Gavazzi. It is a 2-pole voltage monitor relay with an adjustable voltage range, a normally closed contact, and an LED indicator. This device is capable of monitoring both AC and DC single-phase power supplies, and can be used to digitally monitor the position of breakers and start/stop equipment. The adjustable voltage range of the relay can be set between 10V and 280V AC/DC, making it suitable for a wide range of applications. Additionally, the normally closed contact of the relay provides protection against overvoltage and undervoltage, and the LED indicator simplifies troubleshooting. The RM1A23D25 is highly reliable and provides accurate, consistent performance.