Name Designation Color Description
H2 PNSync Green Lit: Task system is synchronized to the bus cycle clock.
Not lit: Task system is not synchronized to the bus cycle clock.
Flashes 0.5 Hz: Task system has synchronized to the bus cycle clock and cyclic data ex‐
change is running.
H3 PNFault Red Not lit: Module is operating without error.
Lit: A system error has occurred (faulty module, incorrect parameterization by the PROFI‐
NET controller, etc.).
H4 DIAG1 Green Reserved
H5 DIAG2 Green Reserved
H6 OVTemp Red Overtemperature display
Note
When the system is booting, LEDs H1, H2 and H3 are lit.
Connectable components
12.3 PP 72/48D PN 2/2A PN
NCU 1740
130 Equipment Manual, 10/2021, A5E51087503B AA