Siemens 3RS1042-2GD70

The Siemens 3RS1042-2GD70 is a temperature monitoring relay designed to work with sensors such as PT100, PT1000, and KTY83/84, as well as NTC types. It features two digitally adjustable threshold values, allowing precise temperature control within a range from –50 °C up to 750 °C, depending on the sensor used. The device operates on 24 V AC/DC and provides two changeover contacts plus one normally open contact, all housed in a compact 45 mm wide unit with a convenient spring-loaded connection system. While the 3RS1042-2GD70 has been phased out, this model is still available through BSP Automation, and their team can help guide you toward the recommended replacement options.