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Siemens Simatic S7-400 User Manual

Page 35

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General Technical Specifications

1-7

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

Battery/Power supply

CPU iput “Ext. Batt.” incl. cable

Ca

Ci + Cc (25nF + Cc)

La

Li + Lc (2mH + Lc)

The batteries used must have the following properties:

Battery technology: Li/SOCL2

Model: AA

Voltage: 3.6 V

The batteries stipulated by Siemens fulfil requirements that go beyond the ones
mentioned above.

You may only use batteries approved by Siemens !

Note

If you do not know the capacity and inductance of the cable, you can use the
following values:

Cc = 197 pF/m (60 pF/ft.), Lc = 0.66 pF/m (0.2 mH/ft)

Example

The battery of type 4022 from Varta together with a 1.5 m long cable and a plug
connection of type 02–02.1500 from Leonhardy meet these conditions.

This manual is related to the following products: