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Yokogawa AXFC-4-L005/CH
Product Overview:
The AXFC-4-L005/CH is a 4-channel analog signal conditioner from Yokogawa’s AXF series. It converts, isolates, and conditions analog signals between field instruments and control systems. The unit provides galvanic isolation between input and output channels to eliminate ground loop interference.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Number of Channels | 4 channels |
| Input Signal Types | Thermocouple (J, K, T, E, R, S, B, N), RTD (Pt100, JPt100, Cu50), DC Voltage (0-1V, 0-5V, 1-5V), DC Current (0-10mA, 4-20mA, 0-20mA) |
| Output Signal Type | 4-20 mA DC (2-wire or 4-wire) |
| Isolation Voltage | 1500 V AC (input to output, input to power, output to power) |
| Power Supply Voltage | 24 V DC (±10%) |
| Power Consumption | Approximately 3.5 W per channel (typical) |
| Accuracy | ±0.1% of span (at 25°C) |
| Response Time | Less than 200 ms (for 90% step response) |
| Operating Temperature Range | -10°C to +55°C |
| Storage Temperature Range | -20°C to +70°C |
| Humidity Range | 20% to 85% RH (non-condensing) |
| Mounting Method | DIN Rail (35mm rail, EN 50022 compliant) |
| Enclosure Rating | IP20 (front panel), suitable for indoor panel mounting |
| Enclosure Material | Flame-retardant polycarbonate plastic (UL94 V-0 rated) |
| Dimensions (W × H × D) | Approximately 75 mm × 100 mm × 105 mm (per channel module width ~17.5mm) |
| Weight | Approximately 300 g per channel |
Functional Features:
- Signal Conversion: Converts various field instrument signals (thermocouple, RTD, mA, mV) to standardized 4-20 mA output
- Linearization: Built-in linearization for thermocouple and RTD inputs
- Cold Junction Compensation (CJC): Automatic CJC for thermocouple inputs with accuracy of ±1°C
- Galvanic Isolation: Full isolation between all channels and between channels and power supply
- Burnout Detection: Detects input sensor break (open circuit) and signals fault condition
- Output Holding: Maintains last valid output in case of power failure or input fault
- Zero/Span Adjustment: Adjustable via front panel or external commands
Working Principle:
The AXFC-4-L005/CH uses precision analog-to-digital conversion (ADC) and digital-to-analog conversion (DAC) with optical or magnetic isolation between stages. The input signal is conditioned, filtered, linearized in the digital domain, then converted back to an isolated 4-20 mA output. The isolation barrier uses high-frequency transformer coupling or optocouplers rated at 1500 V AC.
Advantages and Highlights:
- 4 independent channels in a single compact module
- Universal input acceptance eliminates need for multiple signal conditioner types
- High isolation rating (1500 V AC) provides robust noise immunity
- DIN rail mounting enables standard panel integration
- Wide operating temperature range suitable for harsh industrial environments
- Low power consumption reduces thermal load in control panels
Applicable Industries:
- Oil and Gas
- Chemical and Petrochemical
- Power Generation
- Water and Wastewater Treatment
- Pulp and Paper
- Pharmaceutical
- Food and Beverage
Installation Requirements:
- Mount on DIN 35mm rail (EN 50022) inside a control cabinet
- Maintain minimum 10mm spacing between adjacent modules for ventilation
- Ensure proper grounding of the DIN rail and chassis ground
- Route input and output wiring in separate conduit to prevent crosstalk
- Verify power supply polarity before energizing (24V DC, polarity protected)
Usage Precautions:
- Do not exceed the maximum input voltage of 60V DC or maximum input current of 30 mA
- Do not apply voltage between input terminals and chassis ground exceeding 250V AC
- Ensure ambient temperature stays within -10°C to +55°C during operation
- Perform zero and span calibration after installation and annually thereafter
- Use shielded twisted-pair cables for all analog signal connections
- Do not open the enclosure in hazardous (explosive) atmospheres without proper certification
