IFM PP7551 Pressure Switch – PP-250-SBG14-QFPKG/US/ /V

The IFM PP7551 is a compact electronic pressure switch designed for industrial monitoring and control of fluid and gas systems up to 250 bar. It features two configurable PNP switching outputs, IO-Link communication, and a robust pressure rating of 400 bar, making it ideal for high-pressure environments. The PP7551 is built with IP68 protection, high vibration/shock resistance, and a bright LED status display, ensuring dependable and visible performance in tough machine and automation applications.

Technical Specifications

Model: PP7551
Manufacturer: IFM
Product Series: PP Series
Sensor Type: Electronic pressure switch
Measuring Range: 0…250 bar | 0…3625 psi | 0…25 MPa

Process Connection

• G 1/4 external thread
• Internal M5 thread for secondary mounting options

Electrical Characteristics

• Operating Voltage: 9.6–36 VDC (18–32 VDC in IO-Link mode)
• Current Consumption: < 45 mA
• Insulation Resistance: ≥100 MΩ (500 VDC)
• Protection Class: III
• Power-On Delay: 0.3 s
• Reverse Polarity Protection: Yes
• Electrical Connection: 1 × M12 connector (A-coded)

Output Configuration

• Total Outputs: 2
• Output Signal: Switching / IO-Link (configurable)
• Output Type: PNP
• Digital Outputs: 2 (NO/NC configurable)
• Voltage Drop: ≤ 2.0 V
• Current Rating: 250 mA
• Switching Frequency: 170 Hz
• Short-Circuit Protection: Yes (pulsed)
• Overload Protection: Yes

Measuring & Setting Ranges

• Measuring Range: 0…250 bar | 0…3625 psi | 0…25 MPa
• Set Point (SP): 2…250 bar
• Reset Point (rP): 1…249 bar
• Step Resolution: 1 bar | 20 psi | 0.1 MPa
• Factory Settings:
  • SP1 = 63 bar rP1 = 58 bar
  • SP2 = 188 bar rP2 = 183 bar
  • OUT1 = Hno OUT2 = Hno

Accuracy & Repeatability

• Switch Point Accuracy: < ±0.5% of span
• Repeatability: < ±0.1% of span (ΔT < 10 K)
• Characteristics Deviation: < ±0.25% (BFSL) / < ±0.5% (LS)
• Hysteresis Deviation: < ±0.1% of span
• Long-Term Stability: < ±0.1% of span per year
• Temp. Coefficient (Zero/Span): < ±0.2% of span / 10 K (0…80°C)

Response Times

• Response Time: < 3 ms
• Damping (dAP): Selectable: 0.003 to 0.5 s in 8 steps

IO-Link Communication

• Interface Type: IO-Link v1.0
• Transmission Type: COM2 (38.4 kBaud)
• SIO Mode: Supported
• Profiles: No predefined profile
• Process Data: 1 analogue, 2 binary
• Min. Cycle Time: 2.3 ms
• Master Port Type: Type A
• Device ID: Default = 3

Environmental Conditions

• Ambient Temperature: –25 to +85°C
• Storage Temperature: –40 to +100°C
• Medium Temperature: –25 to +90°C
• Protection Rating: IP68 (7 days / 1 m depth / 0.1 bar)
• Bursting Pressure: 850 bar | 12300 psi | 85 MPa
• Pressure Rating: 400 bar | 5800 psi | 40 MPa
• Type of Pressure: Relative
• Gas Suitability: Conditionally suitable for gases > 25 bar (on request)

Compliance & Certifications

• EMC Standards:
  • EN 61000-6-2
  • ESD: 4 kV contact / 15 kV air
  • HF Radiated: 20 V/m
  • Burst: 4 kV
  • Surge: 0.5–1 kV
  • Conducted HF: 10 V
• Shock Resistance:
  • IEC 60068-2-27/29: 1000 g
  • EN 61373: Category 3
• Vibration Resistance:
  • IEC 68-2-6: 20 g
  • EN 60068-2-64: 14 g
  • EN 61373: Category 2
• MTTF: 308 years

Mechanical Design

• Weight: 227.5 g
• Dimensions: Ø 30 mm × 79.5 mm
• Housing: Cylindrical
• Housing Materials: Stainless steel (304), FKM, EPDM/X, PA
• Wetted Materials: Stainless steel (303), ceramics, FKM
• Pressure Cycle Durability: 100 million cycles
• Restrictor Element: Not integrated

Display & Operating Elements

• Display LEDs:
  • 2 × Green (operation)
  • 2 × Yellow (switching status)
• Teach Function: Supported

Key Features & Benefits:

✅ High Pressure Handling: Designed for up to 250 bar monitoring with 850 bar burst protection.

✅ Dual Output Flexibility: Configure NO/NC outputs independently via IO-Link.

✅ Fast Response Time: Reliable control with < 3 ms switching performance.

✅ Compact Rugged Design: Ideal for limited-space machine applications.

✅ Clear Status Indication: Green/yellow LED display with teach-in functionality.

✅ IP68 Sealing & EMC Certified: Suitable for harsh and mobile environments.

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