Siemens SIMATIC S7-300 Power Supply Modules: 6ES7307-1EA80-0AA0

Technical Dossier

Product Details And Specifications

Siemens SIMATIC S7-300 Series Technical Notes

The Siemens SIMATIC S7-300 is a modular mid-range programmable logic controller platform deployed across heavy industrial sectors including petrochemical refining, nuclear power auxiliary systems, offshore oil & gas processing, pharmaceutical batch control, and automotive body-in-white assembly lines. First introduced in 1993, the S7-300 established a global installed base exceeding several million nodes. Its rack-based architecture, deterministic PROFIBUS-DP communication, and broad I/O density made it the reference standard for distributed control in process industries throughout the 1990s and 2000s. The platform remains operational in thousands of facilities worldwide, making lifecycle parts sourcing — including the 6ES7307-1EA80-0AA0 stabilized power supply — a critical operational requirement.

The Evolution of SIMATIC S7-300 Architecture

The S7-300 platform evolved through three distinct architectural generations. The initial release (1993–1998) established the 40-pin backplane bus, the DIN-rail mounting standard, and the STEP 7 v1–v3 programming environment. CPU variants in this era — including the CPU 312, CPU 314, and CPU 315 — operated with limited onboard memory and required external memory cards (MMC) for program retention.

The second generation (1999–2008) introduced the CPU 31xC compact controllers with integrated I/O, expanded the PROFINET-capable CPU 315-2 PN/DP and CPU 317-2 PN/DP variants, and extended the PS307 power supply range to include the 10 A output class (6ES7307-1KA02-0AA0). Backplane bus bandwidth was increased, and the introduction of the IM 360/361/365 interface modules enabled multi-rack configurations spanning up to four expansion racks.

The third phase (2009–2023) saw Siemens position the S7-300 as a mature/stable platform while actively migrating new designs to the SIMATIC S7-1500. Firmware updates continued for security patches, but no new CPU variants were released. As of 2023, Siemens officially announced end-of-sale for the majority of S7-300 CPUs, with end-of-support scheduled for 2028–2033 depending on module class. This lifecycle status makes third-party spare parts sourcing — particularly for power supply modules such as the 6ES7307-1EA80-0AA0 — essential for facilities that cannot justify a full migration project.

SIMATIC S7-300 Full Catalog & Functionalities (SKU List)

The following catalog covers verified S7-300 module SKUs organized by functional category. Each entry reflects a real, commercially released part number.

Power Supply Modules (PS307)

• 6ES7307-1BA01-0AA0: PS307 2 A stabilized power supply, 120/230 V AC input, 24 V DC / 2 A output, for single-rack configurations with low I/O count.
• 6ES7307-1EA80-0AA0: PS307 5 A stabilized power supply, 120/230 V AC input, 24 V DC / 5 A output — the subject of this listing; standard supply for mid-density S7-300 racks.
• 6ES7307-1EA01-0AA0: PS307 5 A predecessor variant; functionally equivalent to -1EA80, earlier hardware revision with different EMC filter topology.
• 6ES7307-1KA02-0AA0: PS307 10 A stabilized power supply, 120/230 V AC input, 24 V DC / 10 A output; for high-density racks with extensive analog I/O.

Central Processing Units (CPU)

• 6ES7312-1AE14-0AB0: CPU 312, 32 KB work memory, MPI interface, entry-level controller for small standalone applications.
• 6ES7314-1AG14-0AB0: CPU 314, 128 KB work memory, MPI/DP interface, standard workhorse CPU for mid-complexity process control.
• 6ES7315-2EH14-0AB0: CPU 315-2 DP, 256 KB work memory, integrated PROFIBUS-DP master/slave, widely deployed in distributed I/O architectures.
• 6ES7315-2FJ14-0AB0: CPU 315-2 PN/DP, 256 KB work memory, integrated PROFINET IO controller and PROFIBUS-DP; dual-protocol capable.
• 6ES7317-2EK14-0AB0: CPU 317-2 DP, 1 MB work memory, high-performance DP master for large distributed systems.
• 6ES7317-2FK14-0AB0: CPU 317-2 PN/DP, 1 MB work memory, PROFINET IO controller with IRT capability; used in motion-integrated applications.
• 6ES7318-3EL01-0AB0: CPU 319-3 PN/DP, 2 MB work memory, maximum S7-300 performance class, three communication interfaces.

Digital Input/Output Modules (DI/DO)

• 6ES7321-1BH02-0AA0: SM 321 DI 16x24 V DC, 16-channel digital input, 24 V DC, standard process signal acquisition.
• 6ES7321-1BL00-0AA0: SM 321 DI 32x24 V DC, 32-channel digital input, high-density field signal acquisition.
• 6ES7322-1BH01-0AA0: SM 322 DO 16x24 V DC/0.5 A, 16-channel transistor output, 24 V DC, for solenoid valve and relay driving.
• 6ES7322-1BL00-0AA0: SM 322 DO 32x24 V DC/0.5 A, 32-channel transistor output, high-density actuator control.

Analog Input/Output Modules (AI/AO)

• 6ES7331-7KF02-0AB0: SM 331 AI 8x12 Bit, 8-channel analog input, configurable for current (0–20 mA, 4–20 mA) and voltage (±10 V) signals.
• 6ES7332-5HB01-0AB0: SM 332 AO 4x12 Bit, 4-channel analog output, 12-bit resolution, for control valve and positioner setpoint transmission.

Communication & Interface Modules

• 6ES7340-1AH02-0AE0: CP 340 RS-232C communication processor, point-to-point serial communication for legacy device integration.
• 6ES7360-3AA01-0AA0: IM 360 interface module, central rack side, enables multi-rack expansion via IM 361.
• 6ES7361-3CA01-0AA0: IM 361 interface module, expansion rack side, pairs with IM 360 for up to three expansion racks.

Quality Control for the SIMATIC S7-300 Range

S7-300 power supply modules, including the 6ES7307-1EA80-0AA0, undergo a structured bench test protocol prior to dispatch. Each PS307 unit is subjected to: full-load output verification at rated 5 A / 24 V DC, input voltage sweep across the specified 85–264 V AC operating range, ripple and noise measurement (target: <50 mV peak-to-peak), thermal cycling under load for a minimum of 30 minutes, and visual inspection of capacitor condition, PCB traces, and connector integrity.