6ES7407-0DA01-0AA0 - Power Supply Module - SIEMENS

Siemens power supply 6ES7407-0DA01-0AA0, SIMATIC S7-400 PS407 4A

The PS407 4A power module from the SIMATIC S7-400 range is designed to deliver stable, secure power to S7-400 PLC racks. Part number 6ES7407-0DA01-0AA0, it is intended for maintenance teams, system integrators and plant operators who require service continuity on critical automation architectures. Its wide input range for 120/230 V AC and 120/230 V DC enables flexible integration in retrofit or replacement scenarios. The 5 V DC, 4 A output powers the backplane bus and rack modules, with a minimum base load of 100 mA required, while the auxiliary 24 V DC, 0.5 A output covers low-current peripheral needs. The > 20 ms hold-up time, galvanic separation between primary and secondary, and integrated short-circuit protection contribute to system stability and protect connected equipment. The unit fits mechanically into S7-400 racks, with simple wiring on 3 x 1.5 mm² terminals and a protective earth connection in accordance with Protection Class I. An optional backup battery lithium AA 3.6 V, 2.3 Ah preserves data depending on the CPU configuration.

Technical specifications

• Manufacturer part number : 6ES7407-0DA01-0AA0
• Series : SIMATIC S7-400, PS407 4A power supply module
• Manufacturer : Siemens
• Type : Power module for S7-400 rack
• Input voltage : 120/230 V AC, 85 to 264 V, 47-63 Hz, or 120/230 V DC, 88 to 300 V
• Hold-up time : greater than 20 ms
• Outputs : 5 V DC, 4 A for backplane bus, minimum base load 100 mA required, and 24 V DC, 0.5 A
• Typical active power : 52 W, typical losses : 20 W
• Protection : short-circuit protection, galvanic separation between primary and secondary
• Backup battery : optional, lithium AA 3.6 V, 2.3 Ah
• Connections : terminals 3 x 1.5 mm²
• Dimensions and weight : 25 x 290 x 217 mm, 760 g
• Protection class : I, Approval : FM

Overview of the SIMATIC S7-400 range

The SIMATIC S7-400 series from Siemens meets the requirements of process automation and large-scale installations, offering modular architectures, high I/O capacity and strong operational availability. The PS407 4A module powers the backplane bus and contributes to the reliability of the CPU, interface modules and communication cards, in a mechanical format designed for the S7-400 rack. Its compatibility with AC or DC mains supplies simplifies cabinet standardisation, including environments where fluctuating or redundant power supplies are required.

• PS407 power modules : dedicated to powering S7-400 racks, with 5 V outputs for the backplane and an auxiliary 24 V output for low loads, plus integrated protection features.
• S7-400 ecosystem : mechanical and electrical compatibility with CPUs, I/O modules and series interfaces for seamless integration into existing automation systems.

The model 6ES7407-0DA01-0AA0 corresponds to the PS407 4A version, selected when the nominal current required by the main rack and its modules falls around 4 A at 5 V, with a limited 24 V reserve of 0.5 A.

Industrial applications

This power module is used in industrial environments where PLC stability is critical and where continuity of the 5 V DC backplane determines the availability of I/O and the CPU.

• Continuous processes : chemical, petrochemical, pharmaceutical, cement industries, where mains dip ride-through via hold-up time > 20 ms supports loop stability.
• Water & Energy : pumping stations, water treatment, power generation, substations with available AC or DC sources.
• Intralogistics and conveyors : handling and sorting lines, coordinating sensors and actuators under S7-400 control.
• Food & Packaging : packaging, dosing and inspection, synchronisation of machines controlled by the PLC.
• Special machines : cells associated with CNC systems and robot islands where the central PLC requires a reliable 5 V supply.

In these contexts, the PS407 4A delivers regulated power to the rack, a 24 V DC reserve for auxiliary loads, and protection functions that reduce the risk of equipment damage in the event of electrical incidents.

Integration and communication

The 6ES7407-0DA01-0AA0 integrates directly into the SIMATIC S7-400 rack via the dedicated backplane bus connector. Input wiring is carried out on terminals 3 x 1.5 mm², with the protective conductor connected in accordance with Protection Class I. The AC and DC input ranges allow connection to various industrial networks, subject to the limits 85-264 V AC or 88-300 V DC. The module does not implement a communication protocol; its role is strictly to power the system. The > 20 ms hold-up time limits the effects of short mains dips. Primary-to-secondary potential separation and short-circuit protection enhance operational safety.

Commissioning consists of fitting the module to the S7-400 rack with power off, checking input polarity, then verifying the 5 V and 24 V outputs both unloaded and under load. A minimum base load of 100 mA is required on the 5 V bus. The optional backup battery (lithium AA 3.6 V, 2.3 Ah) can be installed according to the CPU memory retention needs. The dimensions 25 x 290 x 217 mm and weight 760 g ensure mechanical compatibility with existing cabinets. The FM approval confirms compliance with specific safety requirements.

Availability and warranty

The SIEMENS PS407 4A 6ES7407-0DA01-0AA0 is offered by Standard Exchange Industry as refurbished, exchange or repair supply. Each unit is bench-tested before shipment and covered by a 6 to 24 month warranty depending on the selected service. Shipping within 24 to 72 hours to over 120 countries. Our technicians assist you in validating compatibility with your SIMATIC S7-400 rack and securing the recommissioning of your installations as quickly as possible.