6ES7505-0KA00-0AB0

Product information

The 6ES7505-0KA00-0AB0 is a Siemens SIMATIC S7-1500 system power supply, PS 25W 24 V DC. It supplies the backplane bus of an S7-1500 rack with operating voltage — 25 W of infeed power from a 24 V DC input at 1.3 A rated current.

On the S7-1500 platform a system power supply is a separate module from the load power supply, and this part is the one that feeds the backplane bus for the modules in the rack. Where an installation is being completed or repaired, matching the correct system power supply rating is part of keeping the rail configuration valid.

Technical specifications

Manufacturer / family	Siemens · SIMATIC S7-1500
Product type	PS 25W 24 V DC
Hardware functional status	From FS01
Firmware version	From V1.0.0
Engineering software	STEP 7 TIA Portal from V12; STEP 7 from V5.5 SP3 or higher
Function	Supplies the backplane bus of the S7-1500 with operating voltage
Supply voltage	24 V DC (static 19.2–28.8 V DC; dynamic 18.5–30.2 V DC)
Input current	1.3 A rated at 24 V DC
Power infeed to backplane bus	25 W
Power loss	6.2 W at nominal rating conditions
Short-circuit protection	Yes
Reverse polarity protection	Yes
Mains buffering	20 ms stored energy time
Potential separation	Primary / secondary, isolated
Isolation tested with	707 V DC (type test)
Protection class	III, with protective conductor

Specifications as published in Siemens product data for this article number. Verify against the nameplate of the unit offered to you.

Where a system power supply fits

On S7-1500 the power supply function is split: a load power supply feeds the 24 V DC field and module supply, while a system power supply such as this one feeds the backplane bus that the modules communicate over. Both may be required in the same rack, so identifying which function an existing installation needs is the first step before ordering a replacement.

Typical applications

• Completing or repairing S7-1500 racks where backplane bus supply must be restored
• Retrofit and spare-part supply on installations standardised on the S7-1500 platform
• Racks where the module complement requires an additional 25 W of backplane infeed
• Replacement of a failed system power supply module with the same rating

Application examples describe typical uses of this product type. Suitability for your own installation must be confirmed against your engineering documentation.

Related references

• 6ES7511-1AK02-0AB0 — S7-1500 CPU 1511-1 PN
• 6ES7307-1KA02-0AA0 — S7-300 regulated load power supply PS307, 24 V / 10 A

Before you order

To confirm a specific unit, please provide the complete ordering code, hardware functional status, a nameplate photograph, the quantity required and the delivery destination. Availability, condition, quantity, lead time and commercial terms are confirmed individually after inquiry.

Frequently asked questions

Is this a load power supply or a system power supply?
It is a system power supply. It feeds the S7-1500 backplane bus with operating voltage; it is not the module that supplies the 24 V DC field load circuit.

How much infeed power does it provide?
25 W to the backplane bus, from a 24 V DC input drawing 1.3 A rated current.

Does it protect against short circuit and reverse polarity?
Yes, both are stated as present in the manufacturer data.

What TIA Portal version is required?
STEP 7 TIA Portal from V12, or STEP 7 from V5.5 SP3 or higher, according to Siemens product data.

What is the price and lead time?
Confirmed individually against current availability for the specific revision and quantity.