Siemens S7-400PLC Spezifikationen Seite 56

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Power supply modules
3.4 Operator controls and indicators
S7-400 Automation System Module Data
56 Reference Manual, Edition 09/2009, A5E00850736-06
Meaning of the LEDs
The meaning of the LEDs on the power supply modules is described in the tables below. The
following section contains a list of the faults indicated by these LEDs and notes on how to
acknowledge the faults.
LEDs INTF, 5 VDC, 24 VDC
Table 3- 2 LEDs INTF, 5 VDC, 24 VDC
LED Color Meaning
INTF Red Lights up in the event of an internal fault
5 VDC green Lights up as long as the 5 V voltage is within the tolerance limits
24 VDC green Lights up as long as the 24 V voltage is within the tolerance limits
LEDs BAF, BATTF
Power supply modules with a backup battery have the following indicators:
Table 3- 3 LEDs BAF, BATTF
LED Color Meaning
BAF Red Lights up if the battery voltage on the backplane bus is too low and the
BATT.INDIC switch is at the BATT position
BATTF Yellow Lights up if the battery is empty, if the polarity is reversed, or if the
battery is missing, and the BATT.INDIC switch is at the BATT position
LEDs BAF, BATT1F, BATT2F
Power supply modules with two backup batteries have the following indicators:
Table 3- 4 LEDs BAF, BATT1F, BATT2F
LED Color Meaning
BAF Red Lights up if the battery voltage on the backplane bus is too low and the
BATT.INDIC switch is at the 1 BATT or 2 BATT position
BATT1F Yellow Lights up if battery 1 is empty or if the polarity is reversed or if the battery
is missing, and the BATT.INDIC switch is at the 1 BATT or 2 BATT
position
BATT2F Yellow Lights up if the battery 2 is empty, if the polarity is reversed, or if the
battery is missing, and the BATT.INDIC switch is at the 2 BATT position
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