Johnson Controls 4214-001

Description

Technical Specifications:

Pressure Range: 0 to 500 Pa (0 to 2.0 in. H₂O)

Output Signal: 4 to 20 mA DC (2-wire loop powered)

Alternative Output: 0 to 10 VDC (available on select variants)

Power Supply: 24 VAC or 24 VDC

Supply Voltage Tolerance: 18 VAC to 32 VAC / 20 VDC to 35 VDC

Accuracy: ±1% of Full Scale (at 25°C / 77°F)

Zero Offset Drift: ±0.5% of Full Scale per year

Span Drift: ±0.5% of Full Scale per year

Response Time: < 500 milliseconds (typical, 90% step response)

Operating Temperature Range: -15°C to +65°C (5°F to 149°F)

Storage Temperature Range: -40°C to +85°C (-40°F to 185°F)

Ambient Humidity: 5% to 95% RH, non-condensing

Overpressure Rating: 4 × Full Scale (2000 Pa) without damage

Burst Pressure: 10 × Full Scale (5000 Pa)

Electrical Protection: Reverse polarity protection, short-circuit protection

EMC Compliance: EN 61326-1 (EMC for measurement and control equipment)

Enclosure Rating: IP65 (with cable gland installed)

Functional Features:

• Continuous Differential Pressure Measurement: Provides real-time monitoring of pressure drop across HVAC components.
• Two-Wire 4-20 mA Output: Enables long-distance signal transmission with minimal noise interference.
• Field-Selectable Range: The transmitter is pre-configured at the factory for the 0-500 Pa range.
• Zero and Span Adjustment: Accessible via external potentiometers on the transmitter housing.
• LED Status Indicator: Visual confirmation of normal operation and fault conditions.
• Fail-Safe Output: Output drops to 3.8 mA in the event of internal sensor failure, enabling fault detection by the BMS.

Material Composition:

Sensor Diaphragm: 316L Stainless Steel

Sensor Housing: Polycarbonate (UL 94 V-0 rated)

Process Connection Fittings: Brass with nickel plating

Cable Gland: Polyamide (PA66), nickel-plated brass

O-Ring Seals: FKM (Viton®)

Printed Circuit Board: FR-4 epoxy glass with conformal coating

Structural Features:

Housing Dimensions: 84 mm × 56 mm × 38 mm (L × W × H)

Process Connection Size: 1/4″ NPT (Female) — two ports (HIGH and LOW pressure)

Cable Entry: M20 × 1.5 cable gland (PG11 equivalent)

Mounting Orientation: Any orientation; diaphragm is not orientation-sensitive

Weight: Approximately 180 grams (with cable gland, no cable)

Terminal Block: Screw-clamp terminal, 2.5 mm² max wire size

Working Principle:
The 4214-001 utilizes a piezoresistive MEMS sensing element bonded to a 316L stainless steel diaphragm. When a pressure differential is applied between the HIGH and LOW ports, the diaphragm deflects proportionally. This mechanical deflection is converted into a change in electrical resistance by the piezoresistive Wheatstone bridge circuit. The onboard signal conditioning ASIC linearizes the output and converts it into a 4-20 mA current signal proportional to the measured differential pressure. The transmitter is loop-powered, drawing its operating current from the same 4-20 mA loop, eliminating the need for a separate power supply.

Key Advantages:

• High Accuracy at Low Pressure Ranges: Optimized for the 0-500 Pa range critical for filter monitoring applications.
• Low Power Consumption: Typical operating current < 20 mA at 24 VDC, suitable for loop-powered BMS inputs.
• Robust Construction: IP65-rated housing withstands dust, moisture, and mild chemical exposure in mechanical rooms.
• Long-Term Stability: Low drift specifications ensure reliable operation over multi-year maintenance cycles.
• Direct BMS Integration: Standard 4-20 mA output is compatible with all major building automation controllers including Johnson Controls Metasys, Siemens Desigo, Honeywell Enterprise Buildings Integrator, and Tridium Niagara.
• No Moving Parts: Solid-state design eliminates mechanical wear and ensures extended service life.

Applicable Industries:

• Commercial HVAC: Air handling units (AHU), fan coil units (FCU), variable air volume (VAV) systems
• Healthcare Facilities: Cleanrooms, hospital isolation rooms, pharmaceutical manufacturing
• Data Centers: CRAC/CRAH unit monitoring, filter bank differential pressure
• Industrial Facilities: Process ventilation, exhaust system monitoring
• Educational Buildings: University campus HVAC, classroom air quality management
• Government Buildings: Federal facility HVAC compliance monitoring

Model Series:
The 4214-001 is part of the Johnson Controls Series 4214 differential pressure transmitter family. Available models include:

All models share the same housing, connection size, output type, and power requirements.

Installation Requirements:

• Mounting Location: Install in a location with stable ambient temperature within the -15°C to +65°C operating range.
• Process Connections: Connect HIGH pressure port to the upstream side (clean air side) and LOW pressure port to the downstream side (dirty air side) of the component being monitored.
• Tubing: Use flexible polyurethane or nylon tubing, 4 mm to 6 mm ID, with maximum tubing length of 15 meters (50 feet) to avoid signal lag.
• Cable Routing: Route signal cable away from high-voltage power cables (minimum separation 150 mm / 6 inches).
• Cable Gland Tightening Torque: 0.5 Nm maximum to avoid cracking the housing.
• Loop Wiring: Connect in series with the BMS analog input module. Total loop resistance must not exceed 600 Ohms at 24 VDC supply.
• Grounding: Connect the transmitter housing to building ground if required by local electrical code.

Usage Precautions:

• Do not exceed the maximum overpressure rating of 2000 Pa (4 × full scale). Sustained overpressure will cause permanent sensor damage.
• Do not apply pressure to only one port while leaving the other port open to atmosphere — this creates a full-scale unidirectional load that exceeds the rated differential and will damage the diaphragm.
• Never use compressed air to blow out process tubing — use a low-pressure hand pump or vacuum source only.
• Clean process connections with isopropyl alcohol (≥ 99%) before initial installation.
• Do not disassemble the transmitter housing — the sensor is calibrated at the factory and field recalibration requires specialized equipment.
• Replace the cable gland O-ring if the enclosure is opened for any reason to maintain the IP65 rating.
• Verify output signal with a calibrated milliammeter after installation and at least annually thereafter.
• Do not install in locations with direct exposure to corrosive chemicals, strong vibration (> 5g), or water submersion — the unit is rated IP65, not submersible.

Certifications and Compliance:

• CE Marking: EN 61326-1, EN 61000-6-2, EN 61000-6-4
• UL Listing: UL 61010-1 (Measurement, Control, and Laboratory Use)
• RoHS Compliant: Directive 2011/65/EU
• REACH Compliant: EC 1907/2006

Part Number Reference:

• Johnson Controls Part Number: 4214-001-001
• Metasys Equipment ID Format: DPT-4214-001
• Replacement Sensor Assembly Part Number: 4214-SENSOR-001 (field-replaceable on select configurations)