Foxboro FBM06

Technical Specifications:

• Input Type: Frequency (Pulse)
• Input Channels: 4 isolated and independent channels
• Input Frequency Range: 3 Hz to 12,500 Hz (software-configurable conversion time)
• Input Resistance: 10 kΩ
• Output Type: 0–20 mA DC current
• Output Channels: 4 isolated and independent channels
• Maximum Output Load: 735 Ω
• Conversion Accuracy: ±0.05% of span (at 25°C)
• Linearity Error: ±0.025% of span
• Resolution: 12 bits
• Power Supply: 12 VDC – 28 VDC (nominal 24 VDC)
• Current Consumption: ≤25 mA
• Operating Temperature: -20°C to +85°C
• Protection Rating: IP65
• Communication Protocol: Modbus RTU
• Settling Time: 100 ms to settle within 1% band for 10–90% input step change Functional Features:
• High-precision frequency-to-current signal conversion
• Galvanic isolation between each channel and ground
• Software-configurable conversion time
• Built-in self-diagnostic function with fault alarm
• Compatible with redundant fieldbus communication
• Compact rugged industrial-grade design Application Scenarios:
• Flow measurement and control in process industries
• Petroleum, chemical, power generation and metallurgy automation systems
• Field signal acquisition and execution in Distributed Control Systems
• High-precision process control requiring stable signal conversion Structural Features:
• Compact modular structure for DIN rail mounting
• IP65-rated enclosure against dust and water ingress
• Integrated terminal interface for field wiring connection Operating Principle: The module receives frequency/pulse signals from field sensors (e.g. flow meters), converts them into standard 0–20 mA analog current signals via internal high-precision sigma-delta conversion circuits, and transmits data to the control system via fieldbus. It also receives control commands and converts them into current outputs to drive field actuators. Installation Requirements:
• Install in a dry, well-ventilated control cabinet or field junction box
• Maintain power supply voltage within 12–28 VDC
• Use shielded signal cables to reduce electromagnetic interference
• Securely mount on standard DIN rail or mounting panel Usage Notes:
• Inspect wiring connections regularly to prevent loosening
• Avoid installation in environments with corrosive gases or severe vibration
• Ensure proper grounding for reliable operation and surge protection