6ES7331-7NF10-0AB0 Siemens Simatic S7-300 Analog I/O Module

Product parameters

Input channels: 8 analog input channels

Millivolt type: ±20mV, ±50mV, ±100mV, ±200mV, ±500mV

Voltage type: ±1V, ±2.5V, ±5V, ±10V, 0~10V

Current type: 4~20mA, 0~20mA

Accuracy grade: ±0.05% full scale; ±0.1% full scale

Resolution: 16-bit AD conversion

Sampling period: Minimum 10ms/8 channels (batch sampling), supporting single-channel individual sampling

Input impedance: Voltage signal ≥ 10MΩ, current signal 250Ω

Anti-interference performance: Complies with EN 61000 electromagnetic compatibility standard, with built-in configurable digital filtering

Power supply requirement: DC 24V, power consumption approximately 3W

Operating temperature: 0℃ to 60℃

Installation method: DIN rail mounting

Protection grade: IP20

Communication method: Data is transmitted in real time with the CPU via the S7-300 backplane bus, without any external independent communication interface

Function

Small signal precise collection: Specifically adapted to ±20mV to ±500mV millivolt-level signals, it can be directly connected to strain gauges, load cells, pressure transmitters and other devices that output small signals, solving the problem of insufficient small signal collection accuracy

Multi-signal compatibility and adaptation: It supports both standard voltage and current signals simultaneously. Without the need for additional signal amplifiers, it can cover the types of commonly used industrial analog sensors and adapt to complex acquisition scenarios

High resolution and low error: 16-bit AD conversion + high-precision grade, combined with channel isolation design, effectively avoids signal crosstalk, ensuring the accuracy and stability of small signal and standard signal acquisition

Flexible configuration and filtering: The signal type, range and filtering time of each channel can be independently configured through the Step7 software. The collected parameters can be optimized according to the on-site interference intensity and signal characteristics without the need for hardware jumpers

Fault diagnosis and status feedback: It is equipped with diagnostic functions such as power failure, signal out-of-range, and sensor disconnection. Fault information is uploaded to the CPU in real time, and the working status is intuitively displayed by the indicator light on the front of the module, facilitating quick problem identification

High-efficiency batch sampling: Supports 8-channel batch synchronous sampling, taking into account the demand for simultaneous monitoring of multiple parameters, and is suitable for multi-point signal acquisition scenarios of production lines and process equipment

Iii. Application Scenarios

Weighing and force value measurement: Weight signal acquisition in industrial weighing systems, pressure/tensile force detection in mechanical processing

Process control small signal acquisition: Signal acquisition for micro pressure transmitters and differential pressure sensors in the chemical and pharmaceutical industries

Manufacturing process monitoring: Welding pressure detection in automotive manufacturing, packaging pressure monitoring in electronic component production, and mold pressure collection for injection molding machines

Material testing equipment: Force value and strain signal acquisition for material tensile testing machines and fatigue testing machines, providing precise data for material performance testing

Energy and power monitoring: Battery pack voltage monitoring (millivolt-level voltage signal), indirect monitoring of winding temperature of small generators

Equipment condition monitoring: Collection of vibration acceleration signals for rotating equipment (fans, pumps), and indirect monitoring of bearing wear

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