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Hans Turck GmbH & Co. KG | T +49 208 4952-0 | F +49 208 4952-264 | [email protected] | www.turck.com
Safety Integrity Level
3
Safety Integrity Level
The devices are rated to a SIL of:
SIL 2
4
Product Description
The isolating switching amplifiers are used for the galvanically isolated transmission of binary
signals from sensors and mechanical contacts. Sensors acc. to EN 60947-5-6 (NAMUR) or me-
chanical contacts can be connected.
The output circuits are isolated from the input circuits and are designed as potential free
transistor.
The input is specified according to EN 60947-5-6.
The device detects a short circuit when an input current of 6.2 mA is exceeded. The short-circuit
condition will end when the input current falls below 5.9 mA.
A rotary switch assignes the inputs to the outputs
SIL2 – 1oo1 [Ex]
[Ax]
Depending on the input signal and according to the configuration (line monitoring, effective
direction), the output assumes the safe state within 20 ms. This leads to the opening of the
normally open contact.
4.1
Safety Function
According to the input signal and the configuration (linemonitoring, effective direction, map-
ping of inputs and outputs) the transistor output is within 20 ms locked.
See
„6.2.1 Parameterization“ on page 14
for input signals and configuration.
More than one channel must not be used for the same safety function, e.g. to increase the hard-
ware failure tolerance to achieve a higher SIL, as they contain common components
The Power-Bridge is not part of the safety-function.
The LED is not part of the safety-function.
The common alarm output is not part of the safety-function.
4.2
Safe State
The safe state is always the “low” state.
The “low” state depends on the output type:
Output type
Requirement state “Low”
Transistor
Transistor is locked
