· Product Introduction

The SPA analog data acquisition module is meticulously designed based on a new generation of embedded systems. Equipped with an isolated communication interface, it can communicate independently with a PC or PLC or be networked with multiple communication modules. It also features a transient suppression circuit that effectively suppresses various surges, ensuring reliable operation in harsh environments.

The SPA4080-ME series AC current acquisition module collects signals from 4/8 channel current transformers. The module utilizes an advanced digital-to-analog converter with a current resolution of 1 mA and a sampling resolution of 19 bits, achieving a measurement accuracy better than 0.05%. It provides isolation among the power supply, input, and communication output. Suitable for acquiring various analog signals in industrial settings, it meets the requirements for applications with high measurement demands, such as industrial sites, medical electronics, security monitoring, intelligent buildings, smart homes, power monitoring, and process control.

This product requires an independent power supply and is mounted on a standard 35mm DIN rail, offering simple on-site installation and flexible use, adapting to a variety of field applications.

· Basic Parameters

Power Supply DC12～36V(DC24V recommended)

Power Consumption ＜1.5W

Measurement Accuracy ±0.5%F.S（+25℃）

Temperature Drift ≤200ppm/℃

Sampling Frequency ≤ 50 Hz per channel

ESD Protection ±15KV

Isolation Voltage 3000VDC

Power Supply Protection  Reverse Power Voltage: <-40V

Dielectric Strength 1500 VAC / 1 minute(Power supply, Input, Output)

Insulation Resistance ≥100MΩ (power supply, input, output)

EMC Compatibility Complies with GB/T18268.1 (IEC61326-1)

Applicable Field Devices Configuration software, PLCs, touch screens, computers, and other devices supporting the MODBUS-RTU protocol

· Input Terminal

Inputs 4/8 channels

Input Signal External through-hole current transformer

Input Range AC0-500A (Refer to product name for input range)

Input Frequency 45-65Hz

Sampling Resolution 19-bit ADC Sine Wave Sampling

Input Overload Capacity 1.2 times the nominal measured current

· Output Terminal

Output Signal RS-485/ Ethernet

Communication Protocol Standard MODBUS-RTU 

Communication Distance 1200m (RS485 typical)

· Environmental Conditions

Operating Temperature -40℃～+80℃

Storage Temperature -40℃～+85℃

Relative Humidity 10%～90%RH (non-condensing)

Atmospheric Pressure 80kPa～106kPa