FMA ELEKTRONIK ST 2002 CONTROLLER SN 19041129 12:37

The FMA Elektronik ST 2002 is a versatile, high-precision, single-loop digital controller designed for a wide range of industrial applications, primarily temperature control, but also capable of handling pressure, level, and flow processes.

Key Product Description:

This controller is a classic, robust unit from the German manufacturer FMA Elektronik, known for its reliability and straightforward operation. The model “ST 2002” represents a standard, feature-rich version from their controller lineup. With the Serial Number 19041129, it indicates a manufacturing date likely in the 41st week of 2019, confirming it is a relatively recent unit.

Key Features and Specifications:

• Display: A clear, easy-to-read 4-digit, 7-segment LED display (typically red) for showing the Process Value (PV) and a secondary display for the Setpoint (SV).

• Control Outputs: The ST 2002 was available in multiple variants. Common output types include:

  • Relay Output: For on/off control of heaters, fans, or solenoid valves.

  • SSR (Solid State Relay) Output: A DC voltage pulse output (e.g., 12V DC) for driving solid-state relays, ideal for precise heating control.

  • Analog Output: A standard 0/4-20 mA or 0-10 V signal for controlling proportioning valves, thyristor units, or variable speed drives.

• Input Types: Highly versatile, accepting a wide range of sensors:

  • Thermocouples: Types J, K, S, R, B, N, etc.

  • Resistance Thermometers (RTD): Pt100, Pt1000.

  • Standard Analog Signals: 0/4-20 mA, 0-10 V.

• Control Action: Features PID (Proportional-Integral-Derivative) control with auto-tuning functionality. This allows the controller to automatically calculate the optimal P, I, and D parameters for the specific process, ensuring fast and stable control without overshoot.

• Alarms: Typically includes one or two programmable alarms. These can be set for various functions like high/low limit, deviation alarm, or process monitoring, and are output via relay contacts.

• Communication: Optional versions were available with RS485 serial communication (often using protocols like Modbus RTU), allowing for integration into a central supervisory system (SCADA, PLC).

• Power Supply: Standard industrial power supplies, such as 24V AC/DC, 110-230V AC.

• Housing: Designed for panel mounting in a standard DIN 43700 cutout (typically 92 x 45 mm or 96 x 48 mm, depending on the exact variant).

Common Applications:

The ST 2002 is a universal controller found in many industrial and laboratory settings, including:

• Industrial Ovens & Furnaces

• Plastic Processing Machinery (Injection Molding, Extrusion)

• Packaging Machines

• Environmental Test Chambers

• HVAC Systems

• Food and Beverage Processing Equipment

• Chemical Process Plants