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Siemens Simatic S7-400 User Manual

Page 119

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Power Supply Modules

3-39

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

Technical Specifications of the PS 405 20 A

Programming Package

Associated programming
package

As of STEP7 V 2.0

Dimensions, Weight, and Cable Cross-Sections

Dimensions WxHxD (mm)

Weight

75x290x217

2 2 kg

Weight

Cable cross-section

2.2 kg

3x1.5 mm

2

(litz wire

ith i d

f

l

(

with wire end ferrule;
use component

d

t

fl

ibl

p

conductor or flexible
sheath cable)

Cable diameter

3 to 9 mm

Input Rating

Input voltage

Rated value

Permitted range

24 VDC

Static:
19.2 VDC to 30 VDC

Dynamic:
18.5 VDC to 30.2 VDC

Rated input current

7.2 A

Starting current inrush

Peak value 48 A
Half-value width 25 ms

Overvoltage resistance

In accordance with DIN
VDE 0160, curve B2

Output Rating

Output voltages

Rated values

5.1 VDC/24 VDC

Output currents

Rated values

5 VDC: 20 A

24 VDC: 1.0 A

Max. residual ripple

5 VDC: 50 mV

SS

24 VDC: 200 mV

SS

Max. switching peaks

5 VDC: 150 mV

S

24 VDC: 500 mV

S

Idle conditions

5 VDC: 200 mA base
load required

24 VDC: Idling-proof
(no base load required)

Other Parameters

Protection class in accordance
with IEC 60536

I, with protective
grounding conductor

Overvoltage category

II

Pollution severity

2

Rated voltage U

e

0 < U

e

50 V

150 V < U

e

300 V

Test Voltage

700 VDC
(secondary <–> PE)

2200 VDC
(primary <–> PE)

Buffering of power failures:

4 ms to 5 ms

Power input

172.8 W

Power loss

46.8 W

Backup current

Max. 100

µ

A at power

off

Backup batteries (optional)

2 x Lithium AA, 3.6 V /
1.9 Ah

Protective separation
to IEC 61131-2

Yes

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