The universal measuring input is freely configurable for resistance thermometers, thermocouples, as well as current and voltage signals. TB/TW monitor thermal processes in systems based on a set threshold. If this threshold is exceeded, the built-in relay switches the system to a safe operating state, and the LED "K1" changes from green to red. When the system returns to the acceptable range, the "Reset" button on the TB must be manually unlocked with an appropriate tool. In contrast, the TW automatically resets itself without external intervention. A binary output of DC 24V/20mA can provide a pre-alarm signal at a configurable temperature before reaching the threshold, which is additionally indicated by the LED "KV". TB/TW are mounted on DIN rails and wired via screw terminals with a maximum conductor cross-section of 2.5 mm². A setup program is available for configuration.