Siemens S7-400PLC Dokumentacja Pobierz pdf (Strona 55)

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Power supply modules

3.4 Operator controls and indicators

S7-400 Automation System Module Data

Reference Manual, Edition 09/2009, A5E00850736-06

3.4 Operator controls and indicators

Introduction

The power supply modules of the S7-400 have essentially the same controls and indicators.

The main differences are:

● Power supply modules with a backup battery have an LED (BATTF) that indicates an

empty, defective, or missing backup battery.

● Power supply modules with two redundant backup batteries have two LEDs (BATT1F and

BATT2F) to indicate empty, defective or missing backup battery.

Operator controls and indicators

The figure shows you an example of a power supply module (PS 407 20A) with two

(redundant) backup batteries. The LEDs are at the top left of the module front plate.

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Figure 3-1 Operator controls and indicators on the PS 407 20A power supply module

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