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K-System – Isolated Barriers
Operation
Collective Error Message on Power Rail
The fault can also be output via the Power Rail as a collective error message (FAULT).
Figure 5.3
The collective error message enables line fault detection of many isolators without requiring
additional wiring. In the event of a fault, a fault message signal is transmitted to the Power Rail
from an isolator. The power feed module evaluates the signal and transmits the fault message
signal to the controller by means of a potential-free contact.
The potential-free contact simultaneously reports the device power failure or the failure
of one device minimum.
Figure 5.4
1
Power feed module
2
Fault indication on one of the devices (red LED flashes)
3
Process control system
4
Fault indication output
38
Power Rail
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15
4
24 V DC
Collective error message via power feed module
24 V DC
FAULT
24 V DC
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14 15
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14 15
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14 15
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14 15
3
2
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