Eastron: DIN-rail electricity meters and Modbus measurement

Eastron makes electricity meters, current sensors and communications products for circuit monitoring, solar systems and charging applications.

Summary

Best for
Single- and three-phase submetering where an existing controller or software system reads documented electrical values.
Less suited to
Using a pulse-only or serial meter as a native Ethernet device: the SDM ordering variant determines the available communications.
Deployment
DIN-rail meters connected directly or through current transformers, with serial or Ethernet collection according to model.
Data in
SDM model-specific Modbus RTU or TCP registers and pulse outputs; other interfaces vary by ordering code.
Pricing
Meter, current-sensor and gateway costs depend on the selected hardware.

Overview

Eastron's SDM naming appears across several different kinds of electricity meter. A useful comparison therefore starts below the brand and family name. The current catalogue distinguishes electrical input arrangements, communications and output options, rather than presenting every SDM unit as the same instrument in a different enclosure.

For a monitoring project, that means selecting the phase arrangement, current input and communications together. A direct-connected meter and a transformer-input meter can report similar quantities while requiring different installation designs. Likewise, a pulse output, a serial Modbus port and a native Ethernet interface create different data-collection paths. Choosing the right suffix is part of the engineering selection.

Offering

The SDM630-Modbus V2 manual documents a three-phase multifunction meter and its serial communications. The separate SDM630-TCP manual documents the Ethernet variant. These are useful alternatives for different site networks; a shared SDM630 family name is not evidence that a serial unit has an Ethernet port.

The 2026 product catalogue also covers smaller single-phase meters and transformer-input models. That makes Eastron relevant to both individual circuits and wider electrical distribution. The selection should retain the full product identity and input specification. A model name shortened for a dashboard is not enough information to procure a replacement meter or reproduce its communications setup.

Technology

Eastron's download centre groups manuals and related documents by named products. This is important for Modbus integrations because a register definition is a device contract: address, data representation and scaling must correspond to the installed model. It is more dependable to bind a configuration to the exact manual than to assume a generic “Eastron” mapping.

The SDM630-TCP documentation and SDM630-Modbus V2 documentation provide distinct network paths. A serial gateway can make an RS-485 installation reachable from an IP application, but that additional component is not the same thing as a native TCP meter. Keeping that distinction in the system design makes troubleshooting and replacement clearer.

Markets

Eastron's systems and solutions range includes connected metering options, while its catalogue spans AC and DC measurement and different installation formats. These choices are relevant to energy monitoring across buildings, solar-related applications and charging systems, where the measurement point may be an incoming supply, an individual load or a DC circuit.

The application label alone does not establish interchangeability. An inverter or charger that expects one particular meter protocol may not accept every device carrying the same brand. A useful specification therefore pairs the measurement requirement with the receiving equipment's exact supported interface, rather than treating Modbus support as a universal plug-and-play guarantee.

Company

Eastron Electronic Co., Ltd. identifies its headquarters as Jiaxing, China, and its company timeline dates establishment to 2012. The same overview describes electricity meters, sensors, communications modules and management systems, with development work in China and the United Kingdom.

This profile focuses on documented product differences rather than repeating group-wide performance claims. Eastron's public download centre is a practical strength for engineering research because it provides a route from a named meter to its own manual. Product approvals and communications capabilities still belong to that individual product and ordering code; they should not be inferred from a general corporate description or a similar-looking enclosure.

Alternatives in power metering and monitoring

What to look for in power metering and monitoring

References

  1. About Eastron (opens in a new tab)
  2. Eastron product download centre (opens in a new tab)
  3. Eastron product catalogue 2026 (opens in a new tab) (PDF)
  4. SDM630-Modbus V2 user manual (opens in a new tab) (PDF)
  5. SDM630-TCP user manual (opens in a new tab) (PDF)
  6. Eastron systems and solutions (opens in a new tab)

This profile does not imply a commercial relationship with Eastron and may contain inaccuracies.