Single-phase electrical energy meter RESI-1DCEGY

DIN railRS-485with data logger

Presentation
RESI offers dedicated DC smart meters designed for telecommunications and other applications requiring DC voltage measurement up to 100 V and DC current measurement up to 255 A. Both module variants periodically store calculated power and energy values in ferromagnetic RAM to enable data recovery after power loss. Firmware allows configuration for external shunt or Hall sensor types from 1 A to 255 A.

Versions / Variants

• RESI-1DCEGYS-SIO: DC Smart Meter, 100 V, 255 A, Shunt, MODBUS/RTU + ASCII, 1x RS232 + 1x RS485
• RESI-1DCEGY-SIO: DC Smart Meter, 100 V, 255 A, Hall sensor, MODBUS/RTU + ASCII, 1x RS232 + 1x RS485
• RESI-1DCEGYS-ETH: DC Smart Meter, 100 V, 255 A, Shunt, MODBUS/TCP + ASCII, 1x Ethernet
• RESI-1DCEGY-ETH: DC Smart Meter, 100 V, 255 A, Hall sensor, MODBUS/TCP + ASCII, 1x Ethernet

Communication and integration
The modules support MODBUS/RTU (via RS232 or RS485) and ASCII text commands, or MODBUS/TCP and ASCII sockets over Ethernet. They are intended for connection to PLCs, industrial PCs, automation systems, media controllers, single-board computers, Raspberry Pi, Arduino and dedicated hardware. Configuration is performed via simple commands (MODBUS registers or ASCII text commands).

Storage / Data security
Both modules cyclically save calculated power and energy values in ferromagnetic RAM so measurements can be restored after a power outage.

Documentation / Scope of delivery (no URLs)

• User manual (RESI-M-xxx-SIO-ETH, multilingual)
• Product inserts for each variant (RESI-PA-... for SIO/ETH variants)
• MODBUS mapping and ASCII command list (product-specific)
• Catalogue pages / product portfolio (DC Smart Meter overview)
• Declaration of conformity / CE documents

Characteristics / Technical specifications

• Voltage measurement range (DC): up to 100 V
• Current measurement range (DC): up to 255 A
• Supported sensor types: external shunt or Hall sensor (configurable, 1 A to 255 A)
• Data storage: cyclic storage of power and energy in ferromagnetic RAM
• Communication protocols: MODBUS/RTU, MODBUS/TCP, ASCII text commands
• Interfaces: RS232, RS485 (SIO variants); Ethernet (ETH variants)
• Compatible with: PLCs, industrial PCs, automation systems, media controllers, single-board computers, Raspberry Pi, Arduino and dedicated hardware
• Example product reference: RESI-1EGYDCS-SIO