Siemens SIMATIC TDC - Page 189

Interface module
7.3 Interface module SB61
SIMATIC TDC hardware
System Manual, 08/2017, A5E01114865-AL
189
Green LED
The voltage supply (1P, 1M) on SIMATIC TDC-side is indicated by a green LED (P).
Red LED
The supply voltage on SIMATIC TDC-side (1P, 1M) is short-circuited (fault).
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