DTL III Ex Digital Safety Temperature Limiter

Certificates

 TUEV 08 ATEX 554871
 GOST R POCC DE.ME92.B02734
 GOSPROMNADZOR 11-02-0015-2012

Ex protection type

 II (2)GD [Ex e II]

Ambient temperature

0 °C to +50 °C

Description

The new DTL III Ex digital temperature limiter, which is adapted to (trace) heating applications, serves to monitor heating and heating circuits. The device is installed in the non-hazardous area. The heating or heating circuits can be installed both in media-protected and also in hazardous areas. Thanks to their integrated power supply unit with wide-range voltage, the devices can be used almost everywhere in the world.

Function

If the temperature at the Pt 100 exceeds the set limit value, the DTL II Ex permanently interrupts the normally closed 16 A switch contact. This situation is detected by a volt-free alarm contact (change-over contact) and passes on the signal to the control panel. After a temperature drop of 5 K below the limit set point, or after a fault has been remedied, the limiter can be re-activated by means of a re-set button on the device itself or via a remote re-set control. The DTL will also interrupt the switch contact in the event of a sensor open or short circuit. Process reliability is increased by additional monitoring functions such as supply voltage monitoring, pre-alarm, measuring circuit monitoring for sensor break, interruption and short-circuit as well as undershooting/overshooting of the measuring range. A multi-stage password management is available for effective parameter protection. When doing service work on the heating circuit, the load output can be turned off by means of a digital input and the temperature alarms can be disabled. Using the programming interface, the device parameters can be read out with a programming key and transmitted to other devices.