ETEL EA-S0M-400-40/80A-0000-00 AccurET Modular Power Supply
ETEL EA-S0M-400-40/80A-0000-00 AccurET Modular Power Supply
The ETEL EA-S0M-400-40/80A-0000-00 (often identified by part numbers such as 814838-00 or adjacent assembly configurations) is the dedicated high-performance power supply unit (PSU) designed for the AccurET Modular 400 series.
Engineered to supply clean, regulated high-voltage DC power across a shared backplane, this unit provides the robust energy reserve necessary to drive multiple high-performance positioning controllers (like the 5A, 10A, and 15A dual-axis modules).
It is a vital component in multi-axis motion stages, automated optical inspection (AOI) systems, and semiconductor processing equipment where high dynamic power and extreme system reliability are required
Product Introduction / Overview
In the modular architecture of the AccurET platform, individual controller modules do not connect directly to the AC mains. Instead, they draw DC voltage from a shared backplane busbar.
The EA-S0M-400-40/80A-0000-00 serves as the central power gateway, converting incoming three-phase AC power into a highly stable, filtered 400 VDC nominal output bus.
With a continuous output rating of 40 A and a transient peak capacity of 80 A, this power supply easily handles rapid, simultaneous multi-axis accelerations without dropping voltage or introducing noise into the sensitive current feedback loops of the neighboring motion drives.
Technical Parameter List
The core electrical and physical parameters of the EA-S0M-400-40/80A-0000-00 power supply are outlined below:
| Parameter Category | Technical Specifications |
| Model Code | EA-S0M-400-40/80A-0000-00 |
| Manufacturer | ETEL S.A. (Switzerland) |
| Device Type | Shared DC Bus Power Supply Unit (PSU) |
| Primary AC Input Voltage | 3-Phase 200 VAC to 480 VAC ($\pm 10\%$, 50/60 Hz) |
| DC Nominal Output Bus ($V_{out}$) | Up to 400 VDC (regulated depending on AC input level) |
| Continuous Output Current ($I_{out}$) | 40 A continuous |
| Peak Transient Output Current ($I_{peak}$) | 80 A peak (for high dynamic acceleration phases) |
| Auxiliary Supply Input | 24 VDC ($\pm 10\%$) for internal control logic |
| Cooling Method | Backplate conduction cooling (designed for cold plate integration) |
| Onboard Safety Logic | Safe Torque Off (STO) support, emergency stop integration |
| Status Interfaces | Dual-color status LEDs (Power, Control, Error) |
| Physical Dimensions (H x D x W) | Approx. 295 mm x 240 mm x 50 mm (Matches AccurET footprint) |
| Unit Weight | Approximately 3.5 kg (7.7 lbs) |
Product Features & Core Advantages
High Energy Density in a Slim Package: Delivers up to 40 A continuous and 80 A peak power in a compact 50 mm wide chassis, matching the physical envelope of standard AccurET Modular drives.
Smart Shared DC Bus Topology: Enables regeneration energy sharing. When one axis decelerates and returns energy to the DC bus, that energy is instantly available to other accelerating axes, maximizing system efficiency and minimizing heat generation inside the cabinet.
Integrated Safety & Protection Circuits: Features active hardware protection against input phase loss, overvoltage, output short-circuits, and severe thermal overloads.
Ultra-Low Electrical Noise Emission: Built-in high-performance filtering stages minimize electromagnetic interference (EMI), ensuring that nearby position encoders and sensor analog signals remain clear of high-frequency noise.
Model Classification (Nomenclature Decoding)
The model code EA-S0M-400-40/80A-0000-00 translates to the following specific configuration:
EA: ETEL AccurET Platform.
S0M: Power Supply (S), Zero-Axis / Supply only (0), Modular mount style (M).
400: Nominal 400 VDC Maximum output capability.
40/80A: 40 A Continuous Output Current / 80 A Peak Output Current.
0000: Standard internal hardware configuration (no expansion or custom interface boards).
00: Initial factory hardware/firmware revision index.
Environmental Tolerance Conditions
To maintain reliable energy delivery and prevent internal thermal failure, ensure the installation environment satisfies the following conditions:
Ambient Operating Temperature: $15^\circ\text{C}$ to $40^\circ\text{C}$ (Standard factory profile. If operated continuously at heavy loads or high ambient temperatures, active forced ventilation or water-cooled backplanes must be employed).
Storage Temperature Range: $-20^\circ\text{C}$ to $70^\circ\text{C}$.
Relative Humidity: 10% to 85% RH, strictly non-condensing.
Operating Environment: IP20 rating. The module is intended for installation inside an industrial, dust-protected, cleanroom-compatible enclosure.
Installation Method
The power supply module is engineered to fit seamlessly next to AccurET position controllers on a unified mounting rack:
Safety Discharge Protocol: Always isolate incoming 3-phase AC power and auxiliary 24 VDC. Wait at least 10 minutes to allow the high-voltage internal bus capacitors to discharge safely to below 50 VDC.
Backplane Insertion: Slide the EA-S0M unit along the guiding rails of the chassis rack. Push firmly until the high-current busbar contacts on the rear are fully engaged with the backplane.
PE Ground Bonding: Secure the unit using the front panel screws on the top and bottom of the module. Tightening these screws establishes the essential low-impedance safety ground (PE) connection.
Busbar Interconnects: Install the busbar linking plates to distribute the 400 VDC output lines across the adjacent AccurET positioning drives.
Operating Instructions
Power-On Sequence: Always apply the auxiliary 24 VDC control power first. This allows the internal control unit to initialize and run self-diagnostic checks before high-voltage AC mains power is present.
Status Check: Verify that the “Control” LED lights up steady green, indicating the logic board is healthy and no system faults are active.
Mains Energization: Close the three-phase AC mains contactor to supply power to the input terminals. The “Power Voltage” indicator will illuminate, signaling that the high-voltage 400 VDC bus is active and charged.
Shutdown Sequence: To turn off the system, disconnect the AC mains first. Allow the “Power Voltage” indicator LED to turn completely off (indicating the bus capacitor voltage has dropped to a safe level) before turning off the 24 VDC auxiliary power.