The STN ATLAS VSM 401 (Part Number: 271.128.309/C) is a high-precision Valve Control Module engineered for industrial automation and fluid control systems. It provides robust signal processing and reliable actuation command outputs to ensure the seamless operation of hydraulic or pneumatic valve assemblies in complex manufacturing environments.

📋 Technical Specifications

• Dimensions: 180mm x 120mm x 60mm
• Weight: 0.85 kg
• Country of Origin: Germany
• Operating Voltage: 24V DC
• Control Interface: Fieldbus-compatible
• Protection Class: IP20

⚙️ Mechanical Installation Requirements

• Mounting Method: The module is designed for standard 35mm DIN rail mounting. Ensure the module is snapped firmly into place until the locking mechanism clicks.
• Spatial Clearance: Maintain a minimum vertical clearance of 50mm above and below the module to allow for adequate airflow and easy access to terminal blocks.
• Thermal Dissipation: Do not install near high-heat components. Ensure ambient operating temperature remains between 0°C and 55°C. Forced air cooling is recommended if multiple modules are densely packed in the same enclosure.

⚡ Electrical Wiring & Connectivity

• Terminal Definitions:
  • Terminals 1-2: 24V DC Power Supply Input
  • Terminals 3-4: Valve Actuator Output (A/B)
  • Terminals 5-6: Communication Bus (A/B lines)
• Wire Gauge Requirements: Use shielded twisted-pair cables with a cross-section between 0.5mm² and 1.5mm² (20-16 AWG) to minimize signal interference.
• Grounding Specifications: Connect the module’s functional earth (FE) terminal directly to the enclosure’s main grounding busbar using a low-impedance copper strap to prevent electromagnetic interference (EMI).

📡 Communication Configuration

• IP Address Setting: Configure the IP address via the integrated DIP switches or the manufacturer’s software tool. Default factory setting is 192.168.1.10.
• Station Number (Node ID): Assign a unique Node ID (Range 1-127) to avoid address conflicts on the bus segment.
• Baud Rate Selection: Set the baud rate to match the master controller network speed (standard support for 9.6 kbps to 1.5 Mbps). Ensure termination resistors (120Ω) are installed at both ends of the bus segment.

❓ Frequently Asked Questions (Q&A)

• What should I do if the “ERR” LED is flashing? Check the communication bus integrity and ensure that the node ID and baud rate match the master controller configuration.
• Is this module hot-swappable? No, power must be disconnected before removing or inserting the module to prevent electrical damage to the backplane connectors.
• Can the module drive valves directly? Yes, it is designed for direct control, provided the solenoid current draw does not exceed the module’s maximum output current specification of 2A per channel.
• How do I perform a factory reset? Hold the “Reset” button located on the front panel for 5 seconds while powering on the unit until the diagnostic LEDs cycle through a green-red sequence.