Technical Specifications:

• Number of Input Channels: 8 channels
• Input Signal Type: 4–20 mA DC (2-wire transmitters)
• Input Resolution: 16-bit A/D converter (65,536 steps)
• Input Impedance: 250 Ω (burden resistor internal)
• Accuracy: ±0.1% of Full Scale (FS)
• Sampling Rate: 100 ms per channel (10 samples/second per channel)
• Communication Protocol: HART 7 overlaid on 4–20 mA signal
• Fieldbus Protocol: F3 Fieldbus (FF H1, 31.25 kbps)
• Isolation: Channel-to-channel isolation, channel-to-bus isolation
• Isolation Voltage: 500 V DC (channel to channel), 500 V DC (channel to bus)
• Power Supply: 24 V DC from F3 bus (bus-powered)
• Power Consumption: Maximum 2.5 W per module
• Operating Temperature: 0°C to +55°C (+32°F to +131°F)
• Protection Rating: IP20 (cabinet installation only)
• Dimensions (W × H × D): 25 mm × 160 mm × 115 mm (card format)
• Weight: Approximately 0.35 kg

Functional Features:

• 8 independent analog input channels with individual scaling and engineering units
• HART communication for remote configuration, diagnostics, and device management
• Channel-to-channel galvanic isolation prevents ground loop interference
• Built-in diagnostics: sensor wire break detection, over-range/under-range indication
• Input filtering: user-configurable damping (0.5 to 60 seconds)
• Hot-swappable — replacement without system shutdown
• LED indicators per channel for status monitoring

Structural Characteristics:

• Standard F3 series card-type module
• DIN rail or chassis mounting (CENTUM VP rack)
• Front-facing terminal blocks for field wiring
• LED status indicators on the front panel

Working Principle:
Each of the 8 channels accepts a 4–20 mA DC signal from a 2-wire field transmitter. The internal 250 Ω burden resistor converts the current to a voltage (1–5 V). A 16-bit A/D converter digitizes this voltage with high resolution. The digital data is transmitted over the F3 fieldbus to the control station. HART communication uses FSK modulation (1200/2200 Hz) superimposed on the 4–20 mA signal to enable bidirectional digital communication with HART-compatible transmitters.

Advantages:

• High resolution (16-bit) for precise measurement
• 8 channels per module — reduces cabinet space and wiring
• HART compatibility enables smart device management
• Full galvanic isolation eliminates ground loop issues
• Bus-powered — no external power supply required

Applicable Industries:

• Oil and Gas Refining
• Chemical Processing
• Power Generation
• Pharmaceutical
• Pulp and Paper

Installation Requirements:

• Install in CENTUM VP F3 controller cabinet or I/O cabinet
• Connect field wiring to front-panel screw terminals
• Use shielded twisted-pair cable for each channel
• Terminate the fieldbus segment with 120 Ω resistor at both ends
• Ensure the cabinet is properly grounded

Precautions:

• Do not apply voltage signals (0–10V, 0–5V) to current input channels — this will damage the module
• Maximum input current: 25 mA DC (do not exceed)
• Ensure proper fieldbus termination to prevent communication errors
• Do not mix intrinsically safe and non-IS circuits on the same module unless specifically rated