Universal f/f–f/I converter 4225B

Functional highlights

• Measures frequencies up to 100 kHz.
• Active and passive current output ±23 mA / 0...23 mA.
• Buffered voltage output ±10 VDC.
• Linearization: Linear or square root function.
• 2-point process calibration.
• Programmable trigger levels -0.05…6.5 V.
• Programmable sensor supply 5…17 V.
• NAMUR sensor error detection.
• Advanced configurable input limits for increased safety.
• Digital output: NPN & PNP; 0...100 kHz with programmable logic level 5…24 V.
• Output relay with windows, setpoint and latch functionality.
• Simulation of process value during commissioning and maintenance.
• All terminals are over-voltage protected (24 VDC), polarity protected and short-circuit protected.
• The 4225 provides the required failure data (SFF and PFDAVG) for SIL 2 applications as per IEC 61508 / IEC 61511.
• Failure rates for 4225 correspond to Performance Level “d” according to ISO-13849.

Technical highlights

• Accuracy < 0.06% / span.
• Temperature coefficient 0.006% / °C.
• Response time < 30 ms.
• 2.3 kVAC, 3-port galvanic isolation.
• NAMUR NE21 and NE43.

Programming

• Configuration, monitoring and diagnostics using the PR 4500 detachable communication interfaces. Product-specific functionality includes communication via Modbus and Bluetooth using our PR Process Supervisor (PPS) application, available for iOS and Android.
• All programming can be password protected.
• Scrolling help text in 7 languages.

Mounting

• Units can be mounted side by side, horizontally and vertically, without air gap on a standard DIN rail – even at 60°C ambient temperature.

Technical articles

• PR 4225A, B and C: choosing outputs for pulse signals

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