The IFM PP7556 is an electronic pressure switch designed for reliable monitoring of relative pressure in industrial applications. It features a ceramic measuring cell and supports a measuring range of 0 to 2.5 bar. The sensor provides two configurable digital switching outputs for flexible control functions. IO-Link communication enables convenient parameterisation, diagnostics and process-data access. Its robust construction and IP68 protection make it suitable for demanding applications involving liquids and gases.
Explore performance details, construction highlights, applications, and technical information in one clear overview.
The PP7556 uses a ceramic measuring cell for dependable pressure monitoring in industrial systems. It is designed to measure relative pressure over a range from 0 to 2.5 bar, equivalent to 0 to 250 kPa. The low-pressure measuring range makes the device suitable for applications where accurate pressure switching is required at comparatively low process pressures. The sensor supports configurable switch and reset points, allowing users to adapt pressure monitoring to individual machine requirements. Its documented switch-point accuracy is better than ±0.5% of span.
The pressure switch provides two digital switching outputs that can be configured according to the required control strategy. The outputs can operate as normally open or normally closed and can be parameterised for different switching functions. Each switching output supports a permanent current rating of up to 250 mA. Short-circuit and overload protection help protect the outputs during demanding operating conditions. The switching frequency is specified up to 170 Hz, supporting responsive pressure-based control in automated machinery.
The PP7556 incorporates an IO-Link communication interface for advanced parameterisation and diagnostics. IO-Link operates using COM2 communication at 38.4 kBaud and provides access to sensor information beyond conventional switching signals. The device also supports SIO operation, allowing it to function with standard switching control when IO-Link communication is not being used. This combination makes the sensor suitable for modern automation architectures where both direct switching and intelligent device communication are required. IO-Link can simplify commissioning, configuration changes and device diagnostics.
The PP7556 is designed for industrial pressure-monitoring applications involving liquids and gases. It uses a G 1/4 external process connection with an M5 internal thread and an M12 electrical connection. The specified medium-temperature range is -25 to 90 °C, while the ambient operating range is -25 to 85 °C. The device provides IP68 protection under the specified test conditions, helping protect the sensor against moisture and demanding environmental conditions. Its pressure rating is 20 bar, with a minimum bursting pressure of 50 bar.
Ceramic measuring cell for reliable industrial pressure monitoring
Relative-pressure measurement from 0 to 2.5 bar
Two configurable digital switching outputs
PNP electrical design
Normally open and normally closed output functions
IO-Link communication interface
COM2 communication at 38.4 kBaud
Configurable switch and reset points
Switch-point accuracy better than ±0.5% of span
Repeatability better than ±0.1% of span under specified conditions
Response time below 3 ms
Short-circuit and overload protection
Reverse-polarity protection
G 1/4 external process connection
M5 internal thread
M12 electrical connection
IP68 protection under specified conditions
Suitable for liquids and gases
Operating voltage of 9.6 to 36 V DC
Two green LEDs for operating status
Two yellow LEDs for output status
Industrial pressure monitoring systems
Low-pressure monitoring in machinery
Pump and fluid handling systems
Water and liquid pressure monitoring
Compressed-air and pneumatic systems
Process equipment using liquid media
Pressure-dependent machine control
Alarm and limit-value monitoring
Automation and control systems
Industrial fluid circuits
Cooling and process-water systems
Machine safety and diagnostic functions
IO-Link-enabled automation installations
Pressure-based switching applications
| Specification | Details |
|---|---|
| Product model | PP7556 |
| Product type | Pressure switch with ceramic measuring cell |
| Ordering code | PP-2,5-RBG14-QFPKG/US/ /V |
| Measuring principle | Ceramic pressure measuring cell |
| Pressure type | Relative pressure |
| Measuring range | 0...2.5 bar |
| Measuring range | 0...2500 mbar |
| Measuring range | 0...36.3 psi |
| Measuring range | 0...250 kPa |
| Set point SP | 0.02...2.5 bar |
| Reset point rP | 0.01...2.49 bar |
| Set-point increment | 0.01 bar / 1 kPa / 0.2 psi |
| Factory SP1 setting | 0.63 bar |
| Factory rP1 setting | 0.58 bar |
| Factory SP2 setting | 1.88 bar |
| Factory rP2 setting | 1.83 bar |
| Number of digital outputs | 2 |
| Electrical design | DC PNP |
| Output function | Normally open / normally closed, configurable |
| Output current rating | 250 mA per switching output |
| Switching frequency | Up to 170 Hz |
| Operating voltage | 9.6...36 V DC |
| Current consumption | <45 mA |
| Communication interface | IO-Link |
| IO-Link revision | 1.0 |
| IO-Link transmission | COM2, 38.4 kBaud |
| SIO mode | Yes |
| Process connection | G 1/4 external thread |
| Additional connection | M5 internal thread |
| Electrical connection | M12 connector |
| Medium | Liquids and gases |
| Medium temperature | -25...90 °C |
| Ambient temperature | -25...85 °C |
| Pressure rating | 20 bar / 290 psi / 2000 kPa |
| Minimum bursting pressure | 50 bar / 725 psi / 5000 kPa |
| Switch-point accuracy | < ±0.5% of span |
| Repeatability | < ±0.1% of span under specified conditions |
| Characteristic deviation | < ±0.25% BFSL / < ±0.5% LS |
| Hysteresis deviation | < ±0.1% of span |
| Long-term stability | < ±0.1% of span per year |
| Response time | <3 ms |
| Protection | IP68 under specified conditions |
| Short-circuit protection | Yes, pulsed |
| Overload protection | Yes |
| Reverse-polarity protection | Yes |
| Insulation resistance | ≥100 MΩ at 500 V DC |
| Protection class | III |
| Power-on delay | 0.3 s |
| Status indication | 2 green LEDs |
| Output indication | 2 yellow LEDs |
| Housing / wetted construction | Industrial-grade materials with ceramic sensing element |
| Application environment | Industrial applications |
| Process media compatibility | Liquids and gases |
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