2023-03
16
H-System – Isolated Barriers and Termination Boards
Product Specifications
2.3.2 Status Indicators of Termination Boards
LEDs are often used on termination boards to indicate different statuses (e. g. for power
supply, device failure, status messages). Standard LED colors are assigned to the status
display according to NAMUR NE 44.
Figure 2.17 Example status indicators
LED Display function Display Meaning
Red LED FAULT Device fault On Module fault, module failure
Power supply failure Flashing Power supply failure
Green LED PWR2 Power supply II On Power supply OK
Off No power
Green LED PWR1 Power supply I On Power supply OK
Off No power
Table 2.2 Meaning of status indicators
1 Red LED FAULT
Module fault, module failure, power supply failure
2 Green LED PWR2
Status indicator power supply II
3 Green LED PWR1
Status indicator power supply I
Note
See corresponding system descriptions of the control system manufacturer
for further information.