General:
The STL50 safety temperature limiter is used where ever thermal processes must be monitored and the system must be transferred into a safe operational state in case of fault. If the permissible temperature limit value is reached, or if a fault occurs within the permissible temperature range on the monitoring equipment
(sensor open, sensor short-circuit, failure of a component part in the device, fault in the software, failure or inadmissible value of the Supply voltage etc.), the STL50 switches off without delay.
The alarm contact is activated, the LED ALARM on the front panel and the back-lighting of the display light
up, and the error cause is indicated as plain text on the display.
In addition, there is a 24 V DC signal present on the terminals 17-18 for an external alarm signal.
Brief description:
Programming: The device is programmed using the front-sided buttons, in connection with the graphics display.
Operating modes: The device can be used as:
STB: Maximum or minimum monitoring with lock
Reset following removal of the fault through actuation of the front side button
or externally connected pushbutton
ASTB: As before, however for the monitoring of the exhaust gas temperature
STW: Maximum or minimum monitoring without lock
Reset automatically on return into the permissible range
Switching hysteresis: Always acts in the direction of safe range.
Error log memory: The last fault is stored as plain text and can be called up in the working level and deleted.
Temperature probe:
Attention: The device may be operated only with temperature probes which are certified according to DIN EN 14597
