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Trip Amplifier 2/209
Safety concept
The following basic principles have been applied:
1. Manipulations are excluded during operation,
2. 2 lines of a digital display give access to important data without disturbing the plant
operation,
3. 4 pairs of analog inputs ensure that single errors on these circuits will be detected.
4. 2 processors monitor each other, a self monitoring feature will generate error codes
in case of faults,
5. a dynamic watch dog circuit together with other safety functions will ensure that
relays.
6. the user program is stored in non-volatile EEPROM,
7. the relay position is monitored continuously,
8. relays are de-energized if program execution is disrupted,
9. single faults will drive the unit to a safe position,
10. each contact circuit is fused are de-energized in case of faults,
11. free programming of the device functions on the basis of safety-tested software via
a PC menu with help texts,
12. approved structure of commands and operating system,
13. safe state after restart,
14. monitoring of the operation and data transfer,
15. structured programming and
16. detailed documentation.
9.1
CE marking
•
The unit 2/209 is designed to be used in an industrial environment.
•
Noise immunity acc. to EN 61000-6-2:2005 and EN 61326-3-2
EN
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