Description
Overview
The Type P200 Pneumatic-to-Current P/I Transducer converts standard pneumatic instrument air signals into a proportional 4-20 mA electrical output. Using all solid-state circuitry, the P200 accepts either a 3-15 psig or 6-30 psig pneumatic input and provides accurate, reliable signal conversion for industrial instrumentation and process control systems.
Designed as a self-contained two-wire device, the P200 combines high accuracy, fast response, and rugged explosion-proof construction. Typical accuracy is ±0.10% of span, while response time is 10 milliseconds to 99% of a step change.
The P200 is FM approved and is available with CSA certification options for hazardous locations. Its enclosure is designed for demanding industrial environments, including Class I, Division 1; Class II, Division 1; and Class III, Division 1 applications when configured with the appropriate approvals.
Key Features
- Pneumatic-to-current signal conversion
- Converts 3-15 psig or 6-30 psig input to 4-20 mA output
- Two-wire 4-20 mA output
- ±0.10% of span typical accuracy
- ±0.15% of span guaranteed accuracy
- 10 millisecond response to 99% of step change
- Negligible hysteresis
- High repeatability
- Infinite resolution
- No output ripple
- Explosion-proof housing
- FM approved
- CSA approval options available
- NEMA 4 enclosure rating with applicable approvals
- Broad 10-42 VDC operating power range
- Multiturn span and zero calibration adjustments
- No mounting position effect
- 1/4″ NPT female pneumatic signal connection
- 1/2″ NPT female electrical conduit connection
Performance Characteristics
- Pneumatic Input Ranges: 3-15 psig (0.2-1.0 bar) or 6-30 psig (0.4-2.0 bar)
- Maximum Input: 3 times full scale without recalibration
- Maximum Input Without Failure: 4 times full scale
- Output: 4-20 mA, two-wire, with over-current limit
- Allowable Load at 24 VDC: 700 Ohms
- Accuracy: ±0.15% of span guaranteed; ±0.10% of span typical
- Repeatability: ±0.10% of span maximum; ±0.03% of span typical
- Hysteresis: Negligible
- Resolution: Infinite
- Output Ripple: None
- Response Time: 10 ms to 99% of step change
- Temperature Stability: Span and zero ±0.007% of span per °F maximum deviation from 77°F calibration
- Power Supply Stability: Less than 0.005% of span output change per volt change at the input terminals
- Power Supply: 10 VDC minimum to 42 VDC maximum at input terminals
- Overvoltage Withstand: Up to 100 VDC indefinitely without failure
- RFI/EMI Effect: Meets or exceeds SAMA PMC 33.1, 1978, 2-abc; 0.1% of span at 10 V/m
- Operating Temperature Range: -40°F to 161°F (-40°C to 72°C)
- Storage Temperature Range: -60°F to 161°F (-51°C to 72°C)
- Calibration Adjustment: Multiturn span and zero potentiometers with approximately ±20% of span adjustment
- Mounting Position Effect: None
- Signal Air Connection: 1/4″ NPT female
- Electrical Wiring Connection: 1/2″ NPT female to barrier terminal strip, up to 14 AWG
The P200 combines precise pneumatic-to-current conversion with excellent repeatability and fast dynamic response. Its specified accuracy includes the combined effects of linearity, hysteresis, and repeatability errors.
How to Select the Right Configuration
Selecting the correct Type P200 configuration depends on the pneumatic input range, hazardous-area certification requirements, and any additional protection or identification options required by the installation.
- Select the P11 input range for standard 3-15 psig pneumatic control signals
- Select the P13 input range for 6-30 psig pneumatic signals
- Select the CSA Intrinsically Safe option when intrinsic safety certification is required
- Select the CSA Explosion-Proof option when CSA explosion-proof certification is required
- Select the Lightning Surge Protector option where additional electrical surge protection is desired
- Select the Extra 316 Stainless Steel Tag option when a durable stainless steel identification tag is required
- Consult ControlAir for custom input range calibrations
- Confirm available loop voltage and load resistance when integrating the P200 into a 4-20 mA control loop
For additional guidance:
Applications
The Type P200 is designed for industrial systems that require conversion of a pneumatic instrumentation signal into a standard 4-20 mA electrical signal.
- Pneumatic-to-electronic signal conversion
- Process control systems
- Industrial instrumentation
- Legacy pneumatic control system integration
- PLC and DCS input conversion
- Remote pressure signal transmission
- Process monitoring
- Control room instrumentation
- Hazardous-area instrumentation
- Oil and gas process systems
- Chemical processing equipment
- Industrial automation systems
Principle of Operation
The Type P200 receives a pneumatic pressure signal through its 1/4″ NPT signal air connection and converts that pressure into a proportional electrical current output. Standard input ranges of 3-15 psig and 6-30 psig correspond to a 4-20 mA two-wire output.
Solid-state electronic circuitry performs the pressure-to-current conversion while maintaining high accuracy and fast response. Span and zero are adjustable through multiturn potentiometers, allowing approximately ±20% calibration adjustment around the standard range.
The P200 is powered through the current loop and operates from 10 to 42 VDC at its input terminals. At a 24 VDC supply, the allowable external loop load is up to 700 Ohms.
Models & Configurations
Type P200 Ordering Structure
P200 + Input Range + Options
Base Model
- P200 = P/I Device, 2-wire, FM explosion-proof, CSA optional, 4-20 mA output
Input Ranges
- P11 = 3-15 psig (0.2-1.0 bar)
- P13 = 6-30 psig (0.4-2.0 bar)
Available Options
- P21 = Lightning Surge Protector
- P23 = Extra 316 Stainless Steel Tag
- P28 = CSA Intrinsically Safe
- P29 = CSA Explosion-Proof
Ordering Example
P200 + P11 + P21
The ordering structure combines the base model with the required pneumatic input range and any selected options. ControlAir also notes that custom range calibrations may be available by factory consultation.
Accessories
- 2″ Pipe U-Bolt Mounting Kit: P/N 748-542-010
The dimensional drawing on page 2 shows the standard P200 housing and the optional 2″ pipe U-bolt mounting arrangement.
Approvals & Hazardous Area Certifications
The P200 is approved by Factory Mutual and the Canadian Standards Association for applicable hazardous-location installations. The specification sheet identifies NEMA 4 enclosure approval and explosion-proof, dust ignition-proof, and intrinsic safety classifications depending on configuration.
- FM approved
- CSA certification options available
- NEMA 4 / Enclosure 4
- Class I, Division 1, Groups A, B, C, D explosion-proof
- Class II, Division 1, Groups E, F, G dust ignition-proof
- Suitable for Class III, Division 1 locations
- CSA intrinsic safety approval available for Class I, Division 1, Groups A, B, C, D
Technical Resources
FAQs
What is the Type P200 P/I transducer used for?
The Type P200 converts a pneumatic pressure signal into a proportional 4-20 mA electrical current signal for industrial instrumentation and process control systems.
What pneumatic input ranges are available?
The Type P200 is available with either a 3-15 psig (0.2-1.0 bar) or 6-30 psig (0.4-2.0 bar) pneumatic input range.
What electrical output does the Type P200 provide?
The P200 provides a two-wire 4-20 mA output with over-current limiting.
How accurate is the Type P200?
The P200 provides ±0.15% of span guaranteed accuracy and ±0.10% of span typical accuracy, including the combined effects of linearity, hysteresis, and repeatability.
What is the response time of the Type P200?
The Type P200 responds to 99% of a step change in approximately 10 milliseconds.
What power supply does the Type P200 require?
The P200 operates from 10 VDC to 42 VDC at its input terminals. It can withstand up to 100 VDC indefinitely without failure.
What is the allowable loop load at 24 VDC?
The allowable load is up to 700 Ohms with a 24 VDC power supply.
Does mounting position affect the Type P200?
No. The specification sheet states that mounting position has no effect on performance.
What is the operating temperature range?
The Type P200 operates from -40°F to 161°F (-40°C to 72°C).
Is the Type P200 explosion-proof?
Yes. The P200 is available with explosion-proof hazardous-area approvals and is designed for demanding industrial applications.
What hazardous location approvals are available?
The P200 has FM approval and CSA certification options for Class I, Division 1, Class II, Division 1, and Class III, Division 1 locations. CSA intrinsic safety certification is also available for applicable Class I, Division 1 installations.
Can custom pressure ranges be ordered?
Yes. The specification sheet directs users to contact ControlAir for information about custom range calibrations.
How is the Type P200 calibrated?
The P200 uses multiturn span and zero potentiometers with approximately ±20% of span adjustment range.
