Siemens Simatic S7-400 - Manual (Page 84)

Power Supply Modules
3-4
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
3.2 Redundant Power Supply Modules
Order Numbers and Function
Table 3-2 Redundant power supply modules
Type Order Number Input Voltage Output Voltage See
Section
PS 407 10A R 6ES7407-0KR00-0AA0 85 VAC to 264 VAC or
88 VDC to 300 VDC 5 VDC/10 A and
24 VDC/1 A 3.8
PS 405 10A R 6ES7405-0KR00-0AA0 19.2 VDC to 72 VDC 5 VDC/10 A and
24 VDC/1 A 3.14
Redundant Operation
If you use two power supply modules of type PS 407 10A R or PS 405 10A R, you
can install a redundant power supply on a mounting rack. We recommend this if
you want to increase the availability of your programmable controller, particularly if
you are operating it on an unreliable power system.
Configuring a Redundant Power Supply
Redundant operation is possible with any of the S7 CPUs and racks described in
this manual. STEP 7 as of V4.02 is also required.
To set up a redundant power supply, insert a power supply module in slots 1 and 3
of the rack. You can then insert as many modules as can be supplied by a single
power supply module. In other words, in redundant operation all the modules can
only draw a total of 10 A.