Safety temperature limiter: technically on the safe side
The Safety-TL4896 meets the specifications of EN 14597, EN 61508 and SIL2 as a safety temperature and as a safety temperature monitor. It enables direct mounting on the switch panel or the switch cabinet door. There is no need for an additional display on the top-hat rail. Configuration of the Safety-TL4896 (STL) takes place directly via the buttons on the front display. Additional software is not necessary. With the integrated analogue output for the temperature signal, an additional measuring chain for the signal for the PLC or SCADA world can also be omitted. The pre-alarm provides an early warning of critical situations and thus prevents unnecessary downtimes.
- Two in one
The Safety-TL4896 safety temperature limiter is an indicator and operating unit in one, eliminating the need for additional devices, such as reset buttons or digital indicators, in the switch panel.
- Adjustable pre-alarm
Unnecessary downtimes can be avoided with an adjustable pre-alarm, even before the limit value is reached.
- Configuration without additional software
Programming takes place via the device buttons and the front display. Use of a PC and additional software is omitted.
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In many systems, safety is not only technically necessary, it is a requirement. In boiler applications for hot water production, for example, the temperatures must be monitored in addition to the limit pressure and water supply. Ultimately, DIN EN12828 prescribes that the power supply is monitored without interruption as soon as only one of the limit values is exceeded – regardless of whether the system is operated with oil, gas or electrical power.
The Safety-TL4896 fulfils these requirements in two respects. It offers an adjustable contact for a pre-alarm for timely warning before limit values are exceeded. It also activates a shut-off contact when limit values are exceeded. With the adjustable pre-alarm, no additional limiter is needed and a redundancy to the automation unit is provided.
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