PLCs, Power Supplies & Others

High-Speed Strain Gauge Measurement for Control Systems

The Bachmann DMS202 is a dual-channel PLC controller module designed for rapid strain gauge signal acquisition. It samples data at 1 kHz, with a 12.5 µs conversion time, ensuring accurate measurement in real-time industrial automation applications. Moreover, its microcontroller-based design enables reliable integration into PLC and DCS control systems.

Versatile Input and Output Capabilities

The module features two strain measurement inputs and two analog measurement outputs. It supports automatic measurement range selection and includes disconnection detection on each input. High-quality plug-in connectors and 500 V electrical isolation provide secure connections for sensitive industrial processes. As a result, operators can monitor strain, pressure, or load variations with high precision.

Key Technical Specifications

• Strain Amplifier Input: Input resistance >5 MΩ, signal bandwidth 1 kHz
• Resolution: 12 bits for accurate readings
• Common Mode Rejection (0–5 kHz): >80 dB
• Bridge Power: 5 kHz ±2%, 4 VRMS ±2%
• Output Voltage: 0–10 V, internal resistance <2 Ω
• Conversion Time: 12.5 µs (single channel), 25 µs (dual channel)
• External Power Supply: 18–34 VDC, 100 mA at 24 VDC
• Reverse Polarity Protection: Yes

These features make the DMS202 ideal for high-speed data acquisition in modern factory automation and precise control systems.

Environmental Robustness

The DMS202 operates in temperatures from 0 to +60°C and tolerates 5–95% relative humidity. Storage conditions range from -40 to +85°C, ensuring durability in industrial and harsh environments. The module’s compact dimensions (55 × 119 × 61 mm) and lightweight design (235 g) allow for easy installation in control cabinets.

Author’s Insight

In practical industrial automation projects, modules like the DMS202 are essential for monitoring fast-changing strain or force in machinery. Its high-speed sampling and built-in disconnection detection reduce system downtime. Moreover, precise analog outputs facilitate seamless integration with PLC, DCS, and advanced control systems, improving reliability and operational efficiency.

Solution Use Cases

1. Automated Manufacturing: Real-time strain monitoring in robotic arms and production lines.
2. Machine Health Monitoring: Detecting mechanical stress and preventing overloads.
3. Process Control: Integration with PLCs for precise measurement and feedback loops.
4. Transportation Systems: Structural monitoring in rail and vehicle automation.
5. Research & Development: Accurate strain measurement for testing and validation.

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