PUR-94D PID Process Controller

The PUR-94D PID Controller from Simex is engineered to deliver both simplicity and advanced functionality in process control applications. It operates as a two-step ON-OFF controller with hysteresis as well as a sophisticated PID controller, supporting two independent control loops for heating and cooling. The device features a dual LED display, providing clear, real-time indication of both the measured process value (PV) and the setpoint value (SV), ensuring operators have immediate access to critical process information.

With a universal input that accepts current, voltage, millivolt, RTD, and thermocouple signals, the PUR-94D adapts easily to a wide range of industrial sensors. Advanced features such as auto-tuning and fuzzy logic algorithms optimize control performance, even in complex or variable process conditions. The controller offers multiple output options, including relay, open collector (SSR), and analog outputs, as well as a 24V DC power supply output for external devices. Configuration is straightforward, either via the local keypad or through the free S-Config software using the RS-485 Modbus RTU interface. With support for a variety of characteristic curves and automatic cold junction compensation for thermocouples, the PUR-94D is a robust solution for demanding process environments.

Features Of The PUR-94D PID Process Controller

  1. Dual LED Display For Process And Setpoint Values Simultaneously shows the measured value and setpoint value on bright, easy-to-read LED displays for clear process monitoring.

  2. Universal Input Compatibility Accepts 0/4-20 mA, 0-10V, 0-150 mV, RTD (Pt100/500/1000), and thermocouple (K, S, J, T, N, R, B, E) inputs for maximum flexibility.

  3. Advanced Control Algorithms Features ON-OFF hysteresis, full PID control, auto-tuning, and fuzzy logic for precise and adaptive process regulation.

  4. Multiple Output Options Offers relay, open collector (SSR), and analog outputs (active or passive), plus a 24V DC power supply output for external devices.

  5. Easy Configuration And Communication Local keypad and free S-Config software via RS-485 Modbus RTU make setup and integration into automation systems simple.

PUR-94D PID Controller Technical Specifications

FeatureSpecification
Power Supply19–50V DC; 16–35V AC; 85–260V AC/DC; 12V AC/DC (all separated)
Power ConsumptionMax. 7 VA (AC), Max. 7 W (DC)
DisplayDual LED: 4 x 13 mm (PV), 4 x 9 mm (SV), red/green or green/red
Displayed Values-999 to 9999, decimal point selectable
Input Types0/4-20 mA, 0-10V, 0-150 mV, RTD (Pt100/500/1000), TC (K, S, J, T, N, R, B, E)
Input FeaturesOverload protection, automatic cold junction compensation, full linearization
Accuracy0.1% @25°C ±1 digit (most inputs), 0.2% (TC N), 0.5% (TC S, T, R, B)
Stability50 ppm/°C
Binary Outputs1, 2, or 4 x REL NO (5A/250V AC), 1 x OC (SSR, 30mA/30VDC)
Analog OutputActive/passive current (0/4-20 mA), active voltage (0/1-5V, 0/2-10V), 13-bit resolution
Power Supply Output24V DC +5%/-10% (max. 100 mA), stabilized
CommunicationRS-485, 8N1/8N2, 1200–115200 bit/s, Modbus RTU
Operating Temperature0°C to +50°C (standard), -20°C to +50°C (option)
Storage Temperature-10°C to +70°C (standard), -20°C to +70°C (option)
Protection ClassIP65 (front), IP20 (case and connection clips)
Case/DimensionsPanel mount, NORYL-GFN25 E1, 96 x 48 x 100 mm, panel cut-out 90.5 x 43 mm
WeightMax. 230 g

Applications For The PUR-94D PID Process Controller

The PUR-94D PID Controller is designed for precise and reliable process control in a wide range of industrial and automation environments. Its universal input, advanced algorithms, and flexible outputs make it ideal for both new installations and retrofits.

Suitable applications include:

  • Temperature control in industrial ovens, furnaces, and kilns
  • Process control in chemical, pharmaceutical, and food industries
  • Heating and cooling loop management in HVAC systems
  • Pressure, flow, and level regulation in process plants
  • Integration into SCADA and automation networks via Modbus RTU
  • Laboratory and test bench process control
  • Water and wastewater treatment process regulation

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