Description
81EU01H-E: Product Overview
This module occupies the power distribution layer within industrial automation architectures, serving as a dedicated DC power source for ABB 800xA distributed control systems (DCS), AC500 PLCs, and associated field devices (sensors, actuators, small drives). Its primary role is to convert 230V AC mains power to a stable 24V DC output, ensuring consistent energy delivery to control logic components that require low-voltage operation.
Core functionality includes voltage regulation with ±1% stability to mitigate line fluctuations, dynamic load handling for simultaneous device activation (e.g., 16 digital outputs), and embedded protective circuits (overload, short-circuit, thermal) that isolate faults without disrupting the entire system. It processes AC input via a switched-mode power supply (SMPS) topology, filtering harmonics and transient surges before conversion.
The module belongs to the ABB Low Voltage Products series, a platform optimized for integration with ABB’s 800xA DCS and modular automation ecosystems. Benefits of this series include DIN rail mounting for space efficiency, compatibility with System 800xA engineering tools for configuration, and adherence to global safety standards (CE, UL 508) for cross-regional deployment.
ABB 81EU01H-E
81EU01H-E: Technical Specifications
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Model Number: 81EU01H-E
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Manufacturer: ABB Ltd.
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Product Type: Low Voltage Power Supply Module
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Input Voltage: 230V AC ±10% (47–63Hz)
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Output Voltage: 24V DC (adjustable ±5%)
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Nominal Current: 10A continuous / 15A peak (10s)
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Protection Features: Overload (OLP), Short-Circuit (SCP), Thermal Fuse
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Operating Temperature: -20°C to +60°C
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Storage Temperature: -40°C to +85°C
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Ingress Protection: IP20 (enclosure)
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Dimensions: 120mm (H) x 100mm (W) x 40mm (D)
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Weight: ~0.8kg
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Efficiency: 88% (typical at full load)
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Certifications: CE, UL 508, RoHS
Core Features & Customer Value
The module’s adaptive voltage regulation compensates for input fluctuations (e.g., motor startup surges in manufacturing plants), ensuring sensitive devices like PLC analog inputs receive stable power. This prevents erratic behavior in high-speed control applications, such as robotic pick-and-place systems, where voltage droop could cause mispositioning. The overload protection (OLP) triggers at 120% of rated current, safeguarding against damage during unexpected load spikes (e.g., simultaneous valve actuation in process control).
Its compact DIN rail design (120mm height) minimizes panel space, critical for retrofits or dense control cabinets in marine automation or space-constrained facilities. Integrated LED indicators (power, output status, fault) provide immediate visual diagnostics, reducing mean time to repair (MTTR) for maintenance teams. Compatibility with ABB System 800xA Alarm & Event Management enables remote monitoring of power health, allowing proactive intervention before failures occur.
The wide operating temperature range (-20°C to +60°C) supports deployment in unconditioned environments, such as outdoor wind turbine control systems or refrigeration units, without additional climate control. High efficiency (88% typical) lowers energy consumption during idle periods, contributing to reduced operational costs in 24/7 facilities.
ABB 81EU01H-E
Typical Applications
In automotive manufacturing, the module powers ABB IRB welding robots’ control cabinets, maintaining 24V DC stability during high-cycle welding operations where rapid actuator switching could otherwise induce voltage dips. The overload protection ensures continuity if a robot arm encounters an unexpected obstruction.
For pharmaceutical processing, it supplies power to CIP/SIP (Clean-in-Place/Sterilize-in-Place) skid controls, where consistent voltage is critical for accurate valve sequencing to meet GMP standards. The IP20 rating allows installation in non-hazardous cleanroom panels.
In oil and gas pipeline monitoring, the module energizes remote valve actuators and RTU (Remote Terminal Unit) sensors, with its -20°C cold-start capability ensuring operation in arctic climates. The compact form factor fits into small junction boxes at unmanned stations.
