PR Electronics Universal f/I-f/f Converter Series Frequency Current Input Analogue Output Relay 4225A

PR Electronics 4225A Universal f/I-f/f Converter is a precision frequency and current converter designed for industrial signal conditioning and automation applications. It supports both current and frequency input signals, providing flexible analogue and relay outputs suitable for monitoring and control tasks.

This device features a wide universal power supply range of 21.6 to 253 VAC and 19.2 to 300 VDC, enabling deployment in various electrical environments. It accurately measures frequencies up to 100 kHz with an exceptional accuracy of less than 0.06% per span. The temperature coefficient is a low 0.006% per °C ensuring stable operation across its operating temperature range from -20°C to 60°C.

The 4225A supports multiple input signal types including NAMUR, NPN, PNP, tacho, TTL, and S0, making it versatile for different sensor systems. Programmable output options include bipolar mA/V signals, frequency output, and relay switching, allowing customization to specific industrial needs. The device is front programmable for ease of configuration.

All terminals are protected against over-voltage, polarity errors, and short circuits, thereby enhancing reliability in industrial conditions. The unit offers programmable sensor supply voltage from 5 to 17 V and includes NAMUR sensor error detection functionality for increased operational safety.

Mounting flexibility is excellent with options for horizontal, vertical, or side mounting on a standard DIN rail without the need for air gaps, even at ambient temperatures of up to 60°C. The device provides 2.3 kVAC, 3-port galvanic isolation, ensuring robust electrical isolation between input, output, and power supply circuits.

Measures frequencies up to 100 kHz with high accuracy. Universal power supply from 21.6 to 253 VAC and 19.2 to 300 VDC. Programmable bipolar mA/V output, frequency output, or relay switching. Supports NAMUR, NPN, PNP, tacho, TTL, and S0 input signals.

Terminals protected against over-voltage, polarity reversal, and short-circuit. Flexible mounting options on DIN rail at high ambient temperatures. Programmable sensor supply voltage 5 to 17 V with NAMUR error detection.

High accuracy below 0.06% span with low temperature drift. Operating temperature range -20°C to 60°C. 3-port galvanic isolation rated at 2.3 kVAC for electrical safety.

This converter is ideal for use in industrial automation, electrical control systems, laboratory instrumentation, and process monitoring applications where reliable signal conditioning is critical. The robust construction and wide input/output compatibility make it suitable for harsh operating environments.

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