General Information

• Brand: Siemens
• Part Number: 6DD1640-0AH0
• Product Series: SIMATIC TDC
• Product Type: Analog Input Signal Module (SM500)
• Core Function: Converts analog signals from field sensors (e.g., temperature, pressure, flow sensors) into digital data for processing by the SIMATIC TDC CPU (e.g., CPU551/553), enabling high-accuracy closed-loop control.
• Compatibility: Exclusively works with the SIMATIC TDC system; communicates via the TDC local bus; configured via SIMATIC TDC Manager software.

Technical Specifications

1. Analog Input Configuration

• Input Channels: 8 independent, galvanically isolated analog input channels (isolation between channels and system, preventing cross-interference).
• Supported Signal Types:
  • Voltage signals: ±10 V DC, ±5 V DC, 0–10 V DC, 0–5 V DC
  • Current signals: 0–20 mA DC, 4–20 mA DC
• Resolution: 16 bits (ensures high-precision signal conversion for critical measurement tasks).
• Conversion Time: ≤ 1 ms per channel (fast conversion for real-time control systems requiring low latency).
• Input Impedance:
  • Voltage inputs: ≥ 100 kΩ
  • Current inputs: ≤ 250 Ω (matches standard industrial current sensors)

2. Accuracy & Error Limits

• Basic Error: ±0.05% of full scale (at 25°C, reference to the selected signal range; ensures minimal measurement deviation).
• Temperature Drift: ±0.001% of full scale per Kelvin (reduces accuracy loss in variable industrial temperature environments).
• Linearity Error: ±0.01% of full scale (ensures consistent conversion across the entire signal range).

3. Power Supply & Electrical Ratings

• Power Source: Powered via the SIMATIC TDC backplane bus (24 V DC, supplied by the TDC system power module).
• Power Consumption: Typical 3 W (low energy use, suitable for dense TDC system configurations).
• Isolation Voltage: 2.5 kV AC (between channels and system, meeting industrial safety standards for high-voltage environments).

4. Operating Environment

• Temperature Range:
  • Operating: 0 °C – 60 °C (suitable for industrial control cabinets with forced air cooling)
  • Storage: -25 °C – 70 °C
• Humidity: 5% – 95% (non-condensing, compliant with IEC 61131-2)
• Electromagnetic Compatibility (EMC): Complies with EN 61000-6-2 (industrial immunity) and EN 61000-6-4 (emission), resisting interference from nearby drives, motors, or high-voltage equipment.
• Vibration/Shock Resistance:
  • Vibration: 5 Hz – 150 Hz, 0.5 g acceleration (IEC 60068-2-6)
  • Shock: 15 g acceleration (11 ms duration, IEC 60068-2-27)

5. Mechanical Characteristics

• Dimensions (W×H×D): 23.6 cm × 30.2 cm × 4.1 cm (matches standard SIMATIC TDC module form factor for rack mounting)
• Mounting Method: Installed in SIMATIC TDC standard racks (e.g., UR 1/UR 2) via slide-in guides
• Protection Level: IP20 (front panel; prevents dust and small debris from entering internal components)
• Weight: Approximately 0.25 kg (lightweight for easy rack assembly)

Functional Features

1. High-Precision Signal Acquisition: 16-bit resolution and low temperature drift make it ideal for applications requiring ultra-accurate analog measurements (e.g., laboratory-grade process control).
2. Galvanic Isolation: Channel-to-channel and channel-to-system isolation eliminates ground loops and signal interference, critical for industrial environments with multiple voltage potentials.
3. Flexible Signal Support: Compatible with both voltage and current analog signals, eliminating the need for additional signal converters and simplifying sensor integration.
4. TDC Bus Integration: Communicates directly with SIMATIC TDC CPUs via the local bus, ensuring high-speed data transfer (no latency from external communication protocols).
5. Diagnostic Functions: Built-in self-diagnosis for channel faults (e.g., open circuit, overrange) and module hardware issues; sends fault codes to the TDC CPU for remote monitoring and troubleshooting.
6. Industrial Durability: Robust design resists vibration, temperature fluctuations, and electromagnetic interference, ensuring reliable operation in harsh industrial conditions.

Application Areas

• High-Precision Process Control: Used in chemical, pharmaceutical, and semiconductor manufacturing to measure and control critical parameters (e.g., reaction temperature, chemical concentration, wafer processing pressure).
• Power Generation: Applied in thermal power plants, wind turbines, and solar farms to monitor analog signals from turbines, generators, and energy meters for efficient power regulation.
• Aerospace & Defense: Used in industrial-grade test benches (e.g., engine performance testing) to acquire high-accuracy analog data for component validation.
• Metallurgical Industry: Integrated into rolling mills and steel production lines to monitor temperature, tension, and pressure signals for precise material processing.