Surpon SPA-300DE DC Energy Meter User Manual

Q: How are the communication address and baud rate set?

Both the address and baud rate can be configured using the front‑panel buttons.

Q: What communication interfaces does the SPA-300DE support?

It supports RS485 or RS232 interfaces using the Modbus‑RTU protocol.

Q: How can accumulated forward or reverse energy be cleared?

When the LCK=100 page shows PH (forward) or -PH (reverse), press the SET key together with the appropriate key to reset the value.

Q: What is the required power supply for the device?

The meter can be powered from DC12 V, DC24 V, DC48 V or AC 220 V, with power consumption under 2 VA.

User manual for the Surpon SPA-300DE DC energy meter, covering installation, operation, parameters and Modbus communication.

Surpon SPA-300DE DC Energy Meter User Manual - cover page

Brand: 苏州迅鹏仪器仪表有限公司
Category: Industrial Supply
Document type: User Manual
Language: Chinese
Pages: 9
File format: PDF
File size: 891 KB
Published: 29 September, 2026
Updated: 29 September, 2026
MD5 checksum: 2FB802A004B48CCE218D76C6D83E9B12
PDF: Surpon SPA-300DE DC Energy Meter User Manual PDF

About this manual

The SPA-300DE is a DIN‑rail mounted DC energy meter designed for solar PV, telecom, industrial DC control and other applications. It measures DC voltage, current, power and both forward and reverse energy, and provides RS485/RS232 Modbus‑RTU communication.

The manual describes the device’s functions, technical specifications, wiring, menu navigation, parameter settings, communication protocol details and error handling, along with dimensions, installation method and contact information for Surpon. This manual is written in Chinese.

What's inside

Introduction
Application Fields
Functional Overview
Technical Specifications
Dimensions and Installation
Wiring and Input Signals
Display Menu and Parameter Settings
Communication Protocol (Modbus)
Modbus Function Codes
CRC Calculation and Error Handling

Specifications

Maximum direct input voltage	0~1000 Vdc (customizable)
Maximum direct input current	0~5 A (special custom up to 20 A)
Temperature coefficient	< 200 ppm/°C
Operating temperature range	0 °C – +55 °C
Communication interfaces	RS485 or RS232 Modbus‑RTU
Display	8‑digit LED numeric display

Frequently asked questions

How are the communication address and baud rate set?

Both the address and baud rate can be configured using the front‑panel buttons.

What communication interfaces does the SPA-300DE support?

It supports RS485 or RS232 interfaces using the Modbus‑RTU protocol.

How can accumulated forward or reverse energy be cleared?

When the LCK=100 page shows PH (forward) or -PH (reverse), press the SET key together with the appropriate key to reset the value.

What is the required power supply for the device?

The meter can be powered from DC12 V, DC24 V, DC48 V or AC 220 V, with power consumption under 2 VA.

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