· 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, the module can communicate individually with a PC or PLC, or be networked with multiple communication modules. Additionally, the module features a transient suppression circuit that effectively suppresses various surge pulses, ensuring reliable operation even in harsh environments.

The SPA1020-NB series DC voltage acquisition module collects 2 channels of voltage signals and is equipped with an RS485 communication interface. It utilizes an advanced Δ-Σ high-precision analog-to-digital converter with a resolution of up to 16 bits and a measurement accuracy better than 0.1%. The module ensures isolation between the power supply, input, and communication output, making it suitable for acquiring various analog signals in industrial settings. It meets the requirements for demanding applications such as industrial sites, medical electronics, security monitoring, smart buildings, smart homes, power monitoring, and process control.

This product requires an independent power supply and adopts a DIN 35mm standard rail mounting method, enabling simple on-site installation and flexible use to accommodate various application scenarios.

· Basic Parameters

Power Supply DC12～36V(DC24V recommended)

Power Consumption ＜1.5W

Measurement Accuracy ±0.1%F.S（+25℃）

Temperature Drift ≤200ppm/℃

Sampling Frequency ≤8Hz

ESD Protection ±15KV

Isolation Voltage 3000VDC

Power Protection Reverse connection voltage< -40V

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

Insulation Resistance ≥100 MΩ (Power, Input, Output)                

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

Applicable Field Devices Devices supporting MODBUS-RTU protocol: Configuration software, PLC, HMI, PC, etc.

· Input Terminal

Number of Channels 2 channels

Input Range DC 0～250V (Refer to product naming for specific range)

Input Impedance ≥1MΩ

Sampling Resolution 16-bit ADC

Input Overload Capacity 1.2 times the nominal value of the measured voltage

· Output Terminal

Output Signal RS-485 communication signal

Communication Protocol Standard MODBUS-RTU protocol

Communication Distance 1200m (typical)

· Environmental Conditions

Operating Temperature -40℃～+80℃

Storage Temperature -40℃～+85℃

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

Atmospheric Pressure 80kPa～106kPa