Siemens FM 355 S (6ES7 355-1VH10-0AE0) – S7-300 Step/Pulse Closed-Loop Control Module

Siemens FM 355 S (6ES7 355-1VH10-0AE0) – S7-300 Step/Pulse Closed-Loop Control Module

The Siemens FM 355 S (Part No. 6ES7 355-1VH10-0AE0) is an intelligent Function Module designed for high-performance, four-channel closed-loop control tasks within the SIMATIC S7-300 PLC system. Often referred to as a **Step and Pulse Controller** or **PID Control Module**, it is optimized for controlling actuators like contactors or solenoid valves (step/pulse control). This unit integrates its own processing and I/O (4 AI / 8 DI / 8 DO), making it a compact and powerful solution for industrial process regulation.

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Quick Navigation

• About This Control Module
• Applications
• Why ROMA Industrial Company
• Technical Specifications
• Key Features & Benefits

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About This Control Module

This product is a dedicated Function Module (FM) that adds complex closed-loop control capabilities to the SIMATIC S7-300. The **FM 355 S** excels at PID control for processes that are managed by simple ON/OFF (step) or time-proportional ON/OFF (pulse) digital outputs. It features integrated I/O that supports a wide range of analog sensors, including voltage, current, and various Thermocouple/RTD types. By executing the complex PID algorithms internally, it frees up the main CPU for primary automation tasks, enhancing system efficiency and response time.

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Applications

This closed-loop control module is suitable for precise process regulation in various industrial systems, including:

• Temperature Control (Furnaces, Ovens, HVAC systems)
• Flow and Level Regulation (using on/off or pulse-modulated valves)
• Pressure Control in Pipelines and Vessels
• General Purpose PID Control for Step/Pulse Actuators

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Why ROMA Industrial Company

ROMA Industrial is your trusted partner for a full range of industrial supplies across categories like Motion Control & Mechatronics, Electrical & Automation, and Fluid Power & Control. We are committed to providing top-tier products and service to keep your operations running smoothly. We partner with world-class shipping providers like FedEx, DHL, and UPS to ensure fast and reliable delivery worldwide. We accept returns to fulfill your satisfaction and accept variable payments methods including PayPal, credit cards, and more. We are a supplier in Europe, USA, and Saudi Arabia.

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Technical Specifications

• Manufacturer: Siemens
• Part Number: 6ES7 355-1VH10-0AE0
• Model: FM 355 S
• Product Type: Function Module (FM) for Closed-Loop Control
• Series: SIMATIC S7-300
• Control Type: PID Closed-Loop Control (Step and Pulse)
• Channels: 4 independent channels
• Analog Inputs (AI): 4 (Supports Voltage, Current, Thermocouple/RTD)
• Digital Inputs (DI): 8 (24V DC)
• Digital Outputs (DO): 8 (Step/Pulse Control, 100 mA rated)
• Supply Voltage: 24 V DC (Rated)
• Hazardous Location: Approved for Class I, Div 2 and Zone 2
• Weight: N/A

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Key Features & Benefits

• Integrated Control: Executes complex PID algorithms internally, offloading the main S7-300 CPU.
• High Versatility: Integrated I/O supports a wide range of process sensors (Voltage, Current, RTD, Thermocouple).
• Optimized Actuation: Designed for step (ON/OFF) and pulse control of digital outputs, common in thermal and fluid regulation.
• Industrial Ready: Approved for Class I, Div 2 hazardous locations, ensuring safe use in demanding environments.