· Product Introduction

SPM Signal Monitoring Module is engineered with a new generation embedded system. It features an isolated communication interface, allowing it to communicate independently with a PC or PLC, or to network with multiple communication modules. The module is also equipped with a transient suppression circuit, which effectively suppresses various surge pulses and ensures reliable operation in harsh environments.

The SPM6-MB series Thermocouple Signal Alarm Setter converts on-site two-wire thermocouple signals into standard 4-20mA signals. Combined with user-defined ranges, alarm setpoints, and alarm modes, it controls two relay alarm outputs. The module utilizes a high-precision internal ADC for data acquisition, with resolution up to 24 bits and measurement accuracy better than 0.1%. It is suitable for temperature signal monitoring in industrial environments.

This product requires an independent power supply and adopts a DIN 35mm standard rail mounting method. Its simple on-site installation and flexible use make it adaptable to various field applications.

· Basic Parameters

Power Supply DC12～36V(DC24V recommended)

Power Consumption < 3W

Measurement Accuracy ±0.1%F.S (+25°C)

Temperature Drift ≤200ppm/°C

ESD Protection ±15kV

Isolation Voltage 3000VDC

Dielectric Strength 1500VAC/1 minute (power, input, output)

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

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

· Input Terminal

Input Signal Two-Wire Thermocouple Signal

Input Range As shown in the sensor range table

Sampling Resolution 24-bit ADC, TI dedicated chip

· Output Terminal 

Output Signal 4-20mA

Load Capacity RL≤500Ω

· Alarm Signal Terminal

Alarm Output   Relay

Response Time ≤20mS

Drive Capability 10A@250VAC；10A@28VDC

Load Capacity     Resistive Load

· Output Terminal

Output Signal RS-485 /Ethernet

Communication Protocol   Standard MODBUS-RTU protocol

Communication Distance 1200 m (typical for RS485)

· Environmental Conditions

Operating Temperature -40℃～+80℃

Storage Temperature -40℃～+85℃

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

Atmospheric Pressure 80kPa～106kPa