DIN rail energy management unit EW900 series

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Product overview
The EW900 energy data manager centralizes measurement data from a distributed network of meters to provide accurate, punctual monitoring of energy consumption and electrical parameters for industrial plants. It supports third‑party meters (electricity, gas, water, steam) and offers local and remote access for data analysis and export.

Key features

• Connect and monitor electricity, gas, water, steam and other third‑party meters.
• Measures active, reactive and apparent power and energy; supports harmonics and THD when combined with EW800 meters.
• Configurable data handling: instantaneous values, trends, min/max, alarms and aggregated logs.
• Configurable graphical visualization and dashboards.
• Wired or wireless connectivity: Ethernet (Modbus TCP/IP), RS485 ModBus RTU, Wi‑Fi, GPRS/HSPA, RF868 MHz.
• Optional hardware interfaces: RS485 ModBus, Modbus TCP/IP, Radio Sub1Ghz (868MHz), S0.
• Manage up to 250 devices and self‑configure measurement networks.
• Remote access via HTTP/HTTPS (JSON), FTP export, OpenVPN/VPN and cloud via MQTT; integration with ESA Everyware server.

Technical data (overview)
Processor - CPU type/clock ; Cortex A8 / 800 MHz ; Cortex A8 / 800 MHz
Processor - RAM ; 256 MB ; 256 MB
Memory - Internal Flash ; Up to 2 GB (application software and logs) ; Up to 2 GB (application software and logs)
Memory - SD Card expansion ; Up to 64 GB (data logging) ; Up to 64 GB (data logging)
Energy Management Software - Preinstalled ; EnergyBasic ; EnergyBasic
Energy Management Software - Option ; EnergySend, EnergyAll, EnergyAlarm, EnergyFFT, EnergyConA0… (module-dependent) ; EnergySend, EnergyAll, EnergyAlarm, EnergyFFT, EnergyConA0… (module-dependent)
Power Supply ; 24 Vdc ; 24 Vdc
Communication - Fieldbuses ; 1 RS485 ModBus RTU, 1 ModBus TCP/IP ; 1 RS485 ModBus RTU, 3 ModBus TCP/IP, Radio RF868 MHz
Communication - Remote ; Ethernet HTTP/JSON, FTP, OpenVPN, GPRS/HSPA (model-dependent), Wi‑Fi (model-dependent) ; Ethernet HTTP/JSON, FTP, OpenVPN, GPRS/HSPA (model-dependent), Wi‑Fi (model-dependent)
Digital Isolated Input/Output ; 3 I/O module (fully configurable) ; 3 I/O module (fully configurable)
Smart sensors - Type ; Electricity, Water, Gas, Steam, etc. ; Electricity, Water, Gas, Steam, etc.
Smart sensors - Network Dimension ; Up to 250 devices ; Up to 250 devices
Case - Mounting ; DIN rail ; DIN rail
Case - Dimensions (mm) ; 56 x 171 x 140 ; 56 x 171 x 140

Order codes / Configurations
Multiple preconfigured SKUs are available to match communication and interface requirements. Examples include EW900A1A033 (1 LAN, RS485, 3 I/O, EnergyBasic), EW900A1B033 (with 3G module), EW900A1C033 (with Wi‑Fi), EW900B1A033 (3 LAN ports), and variants with RF868 MHz and combined mobile/Wi‑Fi options. Full codes in product documentation.

Characteristics / Technical specifications

• Model family: EW900
• Processor: Cortex A8 @ 800 MHz
• RAM: 256 MB
• Internal flash: up to 2 GB (application and logs)
• SD card: up to 64 GB for data logging
• Preinstalled software: EnergyBasic (options: EnergySend, EnergyAll, EnergyAlarm, EnergyFFT, EnergyConA0…)
• Power supply: 24 Vdc
• Fieldbus: RS485 ModBus RTU, Modbus TCP/IP (configurations vary)
• Additional comms: GPRS/HSPA, Wi‑Fi, RF868 MHz (model-dependent)
• Remote access: HTTP/JSON, FTP export, OpenVPN/VPN, MQTT cloud, ESA Everyware
• Digital I/O: 3 inputs / 3 outputs (configurable)
• Supported meters: electricity, water, gas, steam
• Network size: up to 250 devices
• Mounting: DIN rail
• Dimensions: 56 x 171 x 140 mm