Analog devices
4
4.1 Applications
The analog devices are used, for example, for shutdown in case specied limit temperatures are
exceeded, for output of alarm messages or simply as a two-step controller.
They are used in the following applications and more:
• Protection of plants and the environment
• Exhaust temperature monitoring
• Temperature monitoring in control cabinets
• Frost monitoring
• Temperature limits for process variables
• Control of plants and machinery
• Motor monitoring
• Bearing monitoring
• Gear oil monitoring
• Monitoring of coolants
• Packaging industry
• Electroplating
• Air-conditioning systems
• Ventilation systems
• Solar collectors
• Heat pumps
• Hot water supply
• Panel building
• Rail
• Shipbuilding
4.2 General functions
The temperature monitoring relays record the temperature with the aid of temperature sensors
immersed in the medium. The temperature is evaluated by the device and monitored for
overshoot or undershoot of a limit.
The analog devices have an adjustable limit value. They are operated according to the closed-
current principle.
3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002 17