6ES7355-2CH00-0AE0 Siemens Simatic S7-300 Temperature Control Unit

Product parameters

Core specifications: 4 independent closed-loop control channels (supporting PID/PD/P control algorithms), compatible with the backplane bus of S7-300 PLC, with electrical isolation between channels

Supports analog input: 4-20mA, 0-20mA, ±10V, ±5V, ±2.5V (sensor signal acquisition); Input resolution: 16 bits

Supports analog output: 4-20mA (current type, load resistance ≤500Ω), 0-10V (voltage type, load resistance ≥1kΩ); Output resolution: 16 bits

Control cycle: 10ms to 10s (configurable by software, minimum 10ms per channel); Proportional band (P) 0.1 to 1000%, integral time (I) 0.1s to 1000s, differential time (D) 0 to 100s

Isolation and anti-interference: Electrical isolation between channels and between modules and backplane buses; EMC complies with the EN 61000-4 standard and is equipped with a built-in signal filter circuit

Working power supply: 24V DC (external power supply, allowable fluctuation range 20.4-28.8V DC); Power consumption ≤4W

Operating temperature: 0°C to 60°C, storage temperature: -20 °C to +60°C; Humidity: 5%-95% RH (no condensation)

Certification and Standards: Compliant with CE, UL, and CSA certifications; Compatible with all S7-300 series cpus (FM module expansion is required if the CPU firmware version supports it)

Software support: Compatible with Step7 V5.x programming software (V5.3 and above), supports setting control algorithms, PID parameters, input and output ranges through hardware configuration tools, and supports visual monitoring of process values and control values

Function

Multi-channel independent closed-loop control: The 4 channels can be independently configured as PID/PD/P control modes, with each channel corresponding to a complete control loop (sensor signal acquisition → control algorithm operation → actuator drive output), supporting simultaneous control of multiple independent physical quantities (such as different reactor temperatures, multiple storage tank liquid levels).

High-precision signal processing: 16-bit input/output resolution, combined with low drift and high linearity signal conversion circuits, ensures the accuracy of sensor signal acquisition and actuator drive. It is equipped with a built-in configurable filtering function to suppress electromagnetic interference in industrial sites and ensure the stability of process values.

Flexible PID parameter configuration: Supports independent adjustment of proportional (P), integral (I), and differential (D) parameters, and can optimize parameters according to the characteristics of the controlled object. Supports manual/automatic control mode switching. In manual mode, fixed control values can be directly output, facilitating debugging and emergency operations.

Rich control function expansion: Equipped with set value (SP) ramp function, dead zone compensation, and limiting function; Supports alarm function.

Diagnosis and status feedback: It is equipped with power fault, input signal disconnection/over-range, output short circuit/overload diagnosis functions, and fault information is uploaded to the PLC in real time. Supports online monitoring of process values (PV), set values (SP), control output values (MV), and PID parameters through the Step7 software, facilitating debugging and maintenance.

Seamless system integration: Direct communication with the S7-300 PLC backplane bus enables real-time synchronization of control data to the PLC process image area. It supports modification of set values and switching of control modes through PLC programs, and can also upload control status to the SCADA system for remote monitoring.

Application scenarios

Chemical and pharmaceutical industries: Closed-loop control of temperature and pressure in chemical reaction vessels, control of pH value and dissolved oxygen concentration in pharmaceutical fermentation tanks, and regulation of liquid level and flow rate in solvent distillation processes to ensure the stability of production processes and consistency of product quality.

Food and beverage industry: Ingredient flow control in beverage production lines, temperature control in food sterilization equipment, and liquid level stability control in storage tanks, meeting the strict process requirements of the food industry.

Power and energy industry: Flow control of boiler feed water in thermal power plants, steam pressure regulation, temperature control of energy storage systems in photovoltaic power stations, closed-loop regulation of liquid level and flow in cooling systems of substations, ensuring the safe and stable operation of equipment.

Building materials and metallurgy industry: Temperature and kiln pressure control in cement kilns, lubricating oil temperature control in the steel rolling process of steel mills, melt temperature regulation in glass production lines, suitable for high-temperature and high-inertia industrial scenarios.

Water treatment and environmental protection industry: Control of dissolved oxygen concentration and dosing flow in aeration tanks of sewage treatment plants, closed-loop control of pH value and turbidity in the process of drinking water purification, to ensure that the treated water quality meets the standards.

General machinery and automation equipment: segmented control of barrel temperature for injection molding machines, closed-loop regulation of temperature and humidity for constant temperature and humidity test chambers, and control of heating power for industrial ovens, meeting the high-precision process requirements of equipment.

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