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Siemens Simatic S7-400 User Manual

Page 89

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Power Supply Modules

3-9

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

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

INTF, DC 5V, DC 24 V LEDs

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

BAF, BATTF

Power supply modules with a backup battery have the following indicators:

Table 3-4

BAF, BATTF LEDs

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

BAF, BATT1F, BATT2F

Power supply modules with two backup batteries have the following indicators:

Table 3-5

BAF, BATT1F, BATT2F LEDs

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

BATTF

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

BATTF

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

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