Intf, Dc 5V, Dc 24 V Leds; Baf, Battf Leds; Baf, Batt1F, Batt2F Leds - Siemens Simatic M7-400 Reference Manual

Meaning of the LEDs
The meaning of the LEDs on the power supply modules is described in the tables
below. Section 3.5 contains a list of the faults indicated by these LEDs and notes
on how to acknowledge the faults.
INTF, 5 VDC, 24 VDC
Table 3-3
LED
INTF
5 VDC
24 VDC
BAF, BATTF
Power supply modules with a backup battery have the following indicators:
Table 3-4
LED
BAF
BATTF
BAF, BATT1F, BATT2F
Power supply modules with two backup batteries have the following indicators:
Table 3-5
LED
BAF
BATTF
BATTF
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

INTF, DC 5V, DC 24 V LEDs

Color
red Lights up in the event of an internal fault
green Lights up as long as the 5 V voltage is within the tolerance limits
green Lights up as long as the 24 V voltage is within the tolerance
limits

BAF, BATTF LEDs

Color
Red Lights up if the battery voltage on the backplane bus is too low
and the BATT INDIC switch is at the BATT position
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

BAF, BATT1F, BATT2F LEDs

Color
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
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
Yellow Lights up if battery 2 is empty or if the polarity is reversed, or if
the battery is missing, and the BATT INDIC switch is at the
2 BATT position
Power Supply Modules
Meaning
Meaning
Meaning
3-9