Siemens 6ES7407-0DA02-0AA0 Replacement for S7-400 PS407

Product Overview

Siemens 6ES7407-0DA02-0AA0 PS407 4A Replacement for S7-400: Smooth Migration & Legacy System Upgrade

The Siemens 6ES7407-0DA02-0AA0 is a 4A rated power supply module from the SIMATIC S7-400 PS407 series, designed to deliver stable 24 VDC output to the S7-400 central rack. As Siemens progressively phases out legacy S7-400 hardware in favor of the S7-1500 platform, many facilities operating aging control architectures — including those built around the 6ES7407-0KA02-0AA0 (10A variant) or the earlier 6ES7407-0DA01-0AA0 — face urgent decisions around spare parts availability, system continuity, and planned migration timelines.

TOPNLMS maintains verified stock of the 6ES7407-0DA02-0AA0 to support both emergency replacement and structured upgrade programs. Each unit is tested prior to dispatch, ships from Xiamen with full documentation, and is backed by a 12-month warranty.

Compatibility Comparison Table

Seamless Upgrade Solutions

Replacing a power supply module is rarely an isolated action. In most S7-400 retrofit projects, the 6ES7407-0DA02-0AA0 is installed alongside a broader set of components that must be evaluated for compatibility and sourced concurrently to minimize system downtime.

In a typical S7-400 rack, the PS407 power supply feeds the central rack backplane, which may host CPU modules such as the 6ES7414-2XK05-0AB0 (CPU 414-2) or the 6ES7416-2XN05-0AB0 (CPU 416-2), both of which draw regulated 5 VDC from the PS slot. When upgrading from an older PS407 variant, engineers should verify that the CPU’s total current draw — including all installed I/O modules — remains within the 4A output budget of this unit. If the rack is heavily populated with analog I/O modules such as the 6ES7431-1KF20-0AB0 (SM431 32-channel analog input) or digital output modules like the 6ES7422-1BL00-0AA0 (SM422 DO 32×24VDC), a higher-rated supply such as the 10A 6ES7407-0KA02-0AA0 may be more appropriate.

For facilities migrating from legacy S5 systems to S7-400, the transition often involves replacing S5-115U or S5-135U racks entirely. In these scenarios, the 6ES7407-0DA02-0AA0 is typically paired with a new UR2 universal rack (6ES7400-1JA01-0AA0), interface modules such as the 6ES7460-1BA01-0AB0 (IM460 send) and 6ES7461-1BA01-0AA0 (IM461 receive) for multi-rack expansion, and PROFIBUS DP communication processors like the 6GK7443-1EX30-0XE0 (CP443-1) where Ethernet integration is required.

Field engineers performing the swap should also account for the MPI/PROFIBUS programming cable (e.g., PC Adapter USB A2, order ref. 6ES7972-0CB20-0XA0) needed to re-establish communication with the CPU after rack reassembly, as well as any 24 VDC auxiliary power modules supplying field devices and signal isolators in the control cabinet. Ensuring the cabinet’s DIN rail layout accommodates the PS407 module’s standard width is straightforward, as the form factor is unchanged across the PS407 product line.

Retrofit Guidance FAQ

Q: Can I replace the 6ES7407-0DA01-0AA0 directly with the 6ES7407-0DA02-0AA0 without rewiring?
A: Yes. The -0DA02-0AA0 is the direct successor to the -0DA01-0AA0. The terminal block layout, connector pinout, and rack slot position are identical. No rewiring is required — simply power down the rack, swap the module, and restore power.

Q: Do I need to modify my STEP 7 or TIA Portal project after replacing the power supply?
A: No. The PS407 power supply is not a programmable or configurable component in STEP 7 or TIA Portal. It does not appear as a configurable object in the hardware configuration (HW Config). No software changes are needed.

Q: Is the 6ES7407-0DA02-0AA0 compatible with all S7-400 rack types?
A: Yes. It is compatible with UR1, UR2, CR2, ER1, and ER2 racks. It occupies the dedicated PS slot and does not consume a signal module slot.

Q: What is the maximum load this power supply can support?
A: The 6ES7407-0DA02-0AA0 provides 4A at 5 VDC. Before installation, calculate the total current consumption of all modules in the rack (CPU + all I/O modules). If total demand exceeds 4A, use the 10A variant (6ES7407-0KA02-0AA0) instead.

Q: Can this unit be used in a redundant power supply configuration?
A: The PS407 4A does not natively support redundant PS operation in the same way as the PS407 10A with redundancy module. For redundant power architectures, consult Siemens documentation for the appropriate PS pairing and redundancy module (6ES7407-0RA02-0AA0).

Q: What communication protocols does this module affect?
A: As a power supply module, the 6ES7407-0DA02-0AA0 has no direct role in communication protocols (PROFIBUS DP, MPI, Industrial Ethernet). Protocol continuity is determined by the CPU and CP modules installed in the rack.

Q: How long does shipping take?
A: Standard dispatch from Xiamen is within 1–3 business days of order confirmation. International express delivery (DHL/FedEx) typically reaches most destinations within 5–10 business days. Expedited options are available on request.

Warranty Assurance

Every 6ES7407-0DA02-0AA0 unit shipped by TOPNLMS is subject to a pre-dispatch functional test covering output voltage stability, inrush current behavior, and thermal performance under load. Units are packaged in anti-static protective materials with original or equivalent documentation.

• 12-Month Warranty: Covers manufacturing defects and functional failures under normal operating conditions from the date of receipt.
• DOA Policy: Dead-on-arrival units are replaced at no cost within 30 days of delivery, with return shipping covered by TOPNLMS.
• Replacement Support: In the event of a warranty claim, TOPNLMS will dispatch a replacement unit prior to receiving the defective return (subject to stock availability and agreement).
• After-Sales Response: Technical queries and warranty claims are handled within 24 business hours via email or phone.
• Procurement Assurance: All units are sourced through verified supply channels. Certificates of conformity and test reports are available upon request for quality-critical procurement processes.

For volume orders, OEM procurement, or urgent replacement requirements, contact our technical sales team directly.

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