ESA Full-Factor Smart Meter (Rail-Mount)
ESA-1001-R / 1002-R / 1003-R
Rail-mount installation, synchronous acquisition of voltage/current/power/harmonics, 256 samples/cycle, the energy-data base for energy supervision.
Product Overview
The ESA All-Element Smart Meter is a multi-function monitoring terminal designed for low-voltage three-phase distribution systems. Built around a dedicated metering chip with high-precision sensors, it performs real-time acquisition and dynamic sensing of over 40 electrical variables including three-phase voltage, three-phase current, frequency, active power, reactive power, apparent power, power factor, active energy and reactive energy. In addition to basic electrical parameter monitoring, the ESA also supports a variety of alarm outputs such as overvoltage, undervoltage, overcurrent, undercurrent, over-power, under-power, phase loss and DI linkage, helping users keep timely track of distribution operation status and improve electrical safety management.
Core Application Scenarios
Three-phase circuit monitoring of low-voltage distribution cabinets. Energy efficiency management of data centers and server rooms. Power consumption analysis and energy-saving diagnosis of industrial production lines. Sub-metering and operation & maintenance of commercial buildings. Product Features
Data Generated
Product Features
Comprehensive Monitoring
Real-time monitoring of all electrical parameters including three-phase voltage/current, frequency, active/reactive/apparent power, power factor, active/reactive energy, etc.
Wide Measurement Range
Supports 0~2000A metering; as low as class 0.2S with split-core sensors; current monitoring range covers 0~6000A.
All-Weather Sensors
Uses non-contact split-core current sensors for long-term stable operation in strong electromagnetic interference environments.
Complete Alarm Outputs
Alarm status can be written to control; alarm settings can be configured as “closed” or “open”, flexibly adapting to different linkage logic.
Compact, Flexible & Convenient
Equipped with an OLED display and physical keys, supports RS485/Modbus communication, with a DIN rail width of only 36mm.
High Accuracy
Default accuracy class 0.5, as low as class 0.2S with split-core sensors, meeting demanding metering scenarios. Selection Guide
System Topology
Selection Guide
Model Naming Rules
ESA - 1 2 1 1 1 - R: 1 Power: 1=DC 5V / 2=AC 220V; 2 Display: 1=LED digital display / 2=OLED screen; 3 Wiring: 1=three-phase four-wire; 4 Current range: 1=5A / 2=100A / 3=400A / 4=600A; 5 Input/Output: 1=1 relay output + 2 digital inputs; 6 Communication: R=RS485. Model / Power supply / Display / Current rating / Voltage rating / Digital inputs / Relay output / RS485 Modbus: ESA-12111-R DC 5V OLED 3×5A 3×220/380V 2 channels 1 channel supported; ESA-12121-R DC 5V OLED 3×100A 3×220/380V 2 channels 1 channel supported; ESA-12131-R DC 5V OLED 3×400A 3×220/380V 2 channels 1 channel supported; ESA-12141-R DC 5V OLED 3×600A 3×220/380V 2 channels 1 channel supported; ESA-22111-R AC 220V OLED 3×5A 3×220/380V 2 channels 1 channel supported; ESA-22121-R AC 220V OLED 3×100A 3×220/380V 2 channels 1 channel supported; ESA-22131-R AC 220V OLED 3×400A 3×220/380V 2 channels 1 channel supported; ESA-22141-R AC 220V OLED 3×600A 3×220/380V 2 channels 1 channel supported. * Other electrical parameters include frequency, power, power factor, etc. For other ranges or communication configurations, please contact sales for a customized solution. Technical Parameters
| Model | Power Supply / Display / Current Rating / Voltage Rating / Digital Inputs / Relay Output / RS485 Modbus |
| ESA-12111-R | DC 5V / OLED / 3×5A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-12121-R | DC 5V / OLED / 3×100A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-12131-R | DC 5V / OLED / 3×400A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-12141-R | DC 5V / OLED / 3×600A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-22111-R | AC 220V / OLED / 3×5A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-22121-R | AC 220V / OLED / 3×100A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-22131-R | AC 220V / OLED / 3×400A / 3×220/380V / 2 channels / 1 channel / Supported |
| ESA-22141-R | AC 220V / OLED / 3×600A / 3×220/380V / 2 channels / 1 channel / Supported |
Technical Parameters
Basic Parameters
Operating voltage DC 4.75~5.25V (5V model) / AC 180~250V (220V model); power consumption ≤ 2W; operating temperature -20℃ ~ 60℃; operating humidity < 95%; product weight 150g; dimensions 36 × 110 × 69mm (L×W×H); housing material thermoplastic material UL94V0; protection rating IP20; mounting standard 35mm DIN rail; display OLED; communication RS485; protocol Modbus protocol
| Operating Voltage | DC 4.75~5.25V (5V model) / AC 180~250V (220V model) |
| Power Consumption | ≤ 2W |
| Operating Temperature | -20℃ ~ 60℃ |
| Operating Humidity | < 95% |
| Product Weight | 150g |
| Dimensions | 36 × 110 × 69mm (L×W×H) |
| Housing Material | Thermoplastic material UL94V0 |
| Protection Rating | IP20 |
| Mounting | Standard 35mm DIN rail |
| Display | OLED |
| Communication | RS485 |
| Communication Protocol | Modbus protocol |
Monitoring Functions
Voltage (AC): rated 220V/380V; overload 1.2x rated continuous, 2x rated for 1 second; accuracy class 0.5/0.2S. Current (AC): rated 5A, 100A, 400A, 600A; overload 1.2x rated continuous, 2x rated for 1 second; accuracy class 0.5/0.2S. Frequency 45~65Hz, accuracy 0.01Hz. Active energy: accuracy class 1. Reactive energy: accuracy class 2. Digital inputs: dry contact input, built-in power. Digital output: relay output, contact rating AC250V/3A, DC30V/3A, normally open relay contact. Installation Instructions
| Voltage (AC) | Rated 220V/380V; overload 1.2x rated continuous, 2x rated for 1 second; accuracy class 0.5/0.2S |
| Current (AC) | Rated 5A, 100A, 400A, 600A; overload 1.2x rated continuous, 2x rated for 1 second; accuracy class 0.5/0.2S |
| Frequency | 45~65Hz, accuracy 0.01Hz |
| Active Energy | Accuracy class 1 |
| Reactive Energy | Accuracy class 2 |
| Digital Inputs | Dry contact input, built-in power |
| Digital Output | Relay output, contact rating AC250V/3A, DC30V/3A, normally open relay contact |
Installation Instructions
a
Mounting Dimensions
36mm width, 110mm height, 69mm depth, 35mm standard DIN rail b
Sensor Description
The product uses external three-phase current transformers (split-core design) that can be installed without powering off, adapting to various on-site conditions such as cables and busbars; different rated values correspond to different aperture sizes, covering a 5A~1000A range. Rated value: 5A 100A 200A 400A 600A 1000A; Current ratio: 5A/0.33V, 100A/0.33V, 200A/0.33V, 400A/0.33V, 600A/0.33V, 1000A/0.33V; Aperture: 16mm, 24mm, 24mm, 36mm, 36mm, 36mm; 5A 100A 200A 400A 600A 1000A c
| Rated Value | 5A / 100A / 200A / 400A / 600A / 1000A |
| Current Ratio | 5A/0.33V / 100A/0.33V / 200A/0.33V / 400A/0.33V / 600A/0.33V / 1000A/0.33V |
| Aperture | 16mm / 24mm / 24mm / 36mm / 36mm / 36mm |
Interface Description
Wiring definitions: 220V AC power: L1 - live wire; N - neutral wire. 5V DC power: 5V - positive; GND - 0V. RS485 communication: A - RS485 A terminal; B - RS485 B terminal. DI inputs: DI1/DI2 - digital inputs, connect the other end to GND, direction-free. DO outputs: DO1/DO1' - relay outputs, direction-free. Current inputs: IA+/IA-, IB+/IB-, IC+/IC- - three-phase current positive and negative terminals. Voltage inputs: L1/L2/L3 - three-phase voltage; N - neutral wire. Note: Only one of the 220V AC input and 5V DC power input can be used; do not connect both simultaneously.
| 220V AC Power | L1: live wire; N: neutral wire |
| 5V DC Power | 5V: positive; GND: 0V |
| RS485 Communication | A: RS485 A terminal; B: RS485 B terminal |
| DI Inputs | DI1/DI2: digital inputs, connect the other end to GND, direction-free |
| DO Outputs | DO1/DO1': relay outputs, direction-free |
| Current Inputs | IA+/IA-, IB+/IB-, IC+/IC-: three-phase current positive and negative terminals |
| Voltage Inputs | L1/L2/L3: three-phase voltage; N: neutral wire |
Key Points
Definition: The ESA Electrical Safety Monitoring Terminal is FEXLINK's core device for electrical safety monitoring, integrating multi-element monitoring capabilities such as residual current, temperature, voltage and current. Core capabilities: Supports multi-parameter monitoring of residual current, cable temperature, voltage, current, power, harmonics, etc., compliant with the GB 14287 standard, supporting RS485 upload. Applicable scenarios: Suitable for electrical fire monitoring and electrical safety monitoring scenarios such as distribution cabinets, floor distribution boxes and data center PDUs. Related products: ESF electrical fire measurement & control unit, SFA multi-element measurement & control unit, ESX Intelligent Edge Computing Gateway.
FAQ
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