Yokogawa PK200-A73 ControlLinks actuator

Product Detailed Description

• Function:

• Converts an electrical current input signal (e.g., 4-20 mA DC) into a proportional pneumatic output pressure signal (e.g., 3-15 psi).

• Acts as an interface between electronic control systems (DCS, PLC) and pneumatic final control elements (valves, actuators).

• Often features electronic feedback control for maintaining accuracy.

• Can be equipped with an Auto/Manual (A/M) transfer switch for manual control of the output signal.

• Includes built-in stainless steel input/output gauges for local indication.

• Features:

• Model Designation: PK200 series, indicating a Current-to-Pneumatic Converter.

• Input Signal (-A): Specifically 4 to 20 mA DC.

• Output Signal (7): Specifically 3 to 15 psi; with a Gauge scale of 0 to 30 psi.

• Connections (3): Air connection is 1/4 NPT female; Electrical connection is 1/2 NPT female.

• Robust design with minimum effects from process environments.

• Energy-saving design with low air consumption.

• External zero and span adjustments for easy calibration.

• Optional explosion-proof approvals (e.g., /FF1 for FM Explosion proof) and intrinsically safe types (e.g., /CS1).

• Can be mounted on a surface or a 2-inch pipe.

Product Parameters

Based on the specific model PK200-A73 and general PK200 series specifications:

• Model: PK200 Current-to-Pneumatic Converter

• Input Signal: 4 to 20 mA DC

• Output Signal: 3 to 15 psi

• Gauge Scale: 0 to 30 psi

• Air Connection: 1/4 NPT female

• Electrical Connection: 1/2 NPT female

• Accuracy: ±0.5% of span

• Linearity: ±0.2% of span

• Hysteresis: 0.2% of span

• Repeatability: 0.1% of span

• Air Supply Pressure: 140 kPa (standard output), 240 kPa (doubled output)

• Max. Air Consumption: 4 Nl/min or 0.24 Nm³/hr at 140 kPa (20 psi) air supply pressure

• Max. Output Air Capacity: 110 Nl/min or 6.6 Nm³/hr at 140 kPa (20 psi) air supply pressure

• Operating Temperature Limits (General Use): -40 to 80 °C (-40 to 176 °F)

• Approximate Weight: 2.8 kg (unit only), Shipping weight around 4-5 kg (depending on options/packaging).

• Degree of Protection: Typically IP54, NEMA 4X (for certain explosion-proof types).

• EMC Conformity: EN61326-1 Class A, Table 2 (For use in industrial locations).

• Reverse Polarity Protection: No damage occurs from reversal of normal supply current (4-20 mA) or from misapplication of up to 62 mA.

• Stability (Short term): 0.1% of F.S./hr.

Product Advantages

• High Accuracy and Reliability: Ensures precise and consistent conversion for critical process control.

• Low Air Consumption: Energy-efficient design helps reduce operating costs (Max. 4 Nl/min).

• High Air Delivery Capacity: Capable of actuating various pneumatic devices (Max. 110 Nl/min).

• Electronic Feedback Control: Contributes to stable and accurate performance.

• Minimum Effects from Process Environments: Designed to withstand industrial conditions.

• Versatile Application: Suitable for a broad range of process control needs, from simple signal conversion to complex valve actuation.

• Built-in Gauges: Provides convenient local indication of input and output signals.

• Optional Features: Available with explosion-proof and intrinsically safe options for hazardous area installations.

Precautions

• Proper Installation: Adhere strictly to the installation guidelines provided in the Yokogawa user manual. Ensure correct mounting (surface or pipe) and secure connections.

• Air Supply Quality: Ensure the air supply is clean, dry, and within the specified pressure range to prevent damage and ensure optimal performance. Contaminants and moisture can degrade internal components.

• Electrical Connection: Connect the electrical input correctly (4-20 mA DC) and ensure proper grounding. Observe polarity to prevent reverse polarity protection from being activated.

• Environmental Conditions: Operate within the specified temperature and humidity limits. Avoid excessive vibration or physical shock.

• Calibration and Adjustment: While highly stable, periodic checks and re-calibration of zero and span may be required depending on application accuracy requirements and operating conditions.

• Hazardous Area Considerations: If using explosion-proof or intrinsically safe versions, strictly follow all relevant safety standards and wiring practices for hazardous locations. Ensure compatible safety barriers are used for intrinsically safe installations.

• User Manual: Always consult the official Yokogawa PK200 Current-to-Pneumatic Converter User's Manual (e.g., IM21B03D01-01E) for detailed safety precautions, installation instructions, wiring diagrams, and troubleshooting.

Product Applications

The Yokogawa PK200-A73 is widely used in various industrial process control applications where an electrical signal needs to be converted into a pneumatic signal to operate pneumatic devices. Common applications include:

• Actuating Control Valves: Driving diaphragm-operated control valves in process loops (e.g., flow, pressure, level, temperature control).

• Pneumatic Actuators: Controlling air cylinder-operated valves, dampers, and other pneumatic actuators.

• Hybrid Instrumentation Systems: Serving as an interface between electronic Distributed Control Systems (DCS) or Programmable Logic Controllers (PLC) and legacy or existing pneumatic instrumentation.

• Boiler and Burner Control: Regulating air/fuel ratios or damper positions.

• Chemical and Petrochemical Plants: In processes requiring precise pneumatic control.

• Power Generation: Controlling various pneumatic components within power plants.

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Related products:

E-mail: alex@fenoux.com

Tel.: +86 13338369201

Skype: +86  13338369201

WhatsApp: +86  13338369201