Foxboro FBM241C

Technical Specifications:

• Input Channels: 8 discrete inputs
• Input Voltage Range: 15 – 60 VDC
• Input On-State Voltage: 15 to 60 VDC
• Input Off-State Voltage: 0 to 5 VDC
• Input Current: 1.4 mA typical at 5–60 VDC
• Output Channels: 8 discrete outputs (external source)
• Maximum Output Voltage: 60 VDC
• Maximum Output Current: 2.0 A per channel
• Isolation: Galvanic isolation channel-to-channel and channel-to-ground; withstands 600 VAC for 1 minute
• Debounce Time: Configurable: 0, 4, 8, 16, 32 ms
• Power Supply: 24 VDC ±5%, max 5 W
• Heat Dissipation: Max 6 W
• Operating Temperature: –40°C to +85°C Functional Features:
• Software-configurable input filter/debounce
• Full galvanic isolation for safety and noise immunity
• Self-diagnostic and fault detection functions
• Hot-swap capability for online maintenance
• Per-channel LED status indicators
• Compatible with 2 Mbps redundant fieldbus Application Scenarios:
• Connection of limit switches, push buttons, relays and other discrete devices
• On-off control in chemical, oil & gas, metallurgy and pulp & paper industries
• Interlock and sequence control in process automation
• Discrete signal monitoring in harsh environments Structural Features:
• Compact modular housing with heat dissipation structure
• Standard rack mounting for I/A Series 200 systems
• Front panel LED indicators for real-time status
• Plug-in terminals for easy wiring and maintenance Operating Principle: The module detects on/off states of field discrete devices, performs signal conditioning and debounce filtering, and transmits status data to the control system via fieldbus. For outputs, it receives switch commands and drives external loads through output switches. Full galvanic isolation improves system safety and noise immunity. Installation Requirements:
• Mount in standard I/A Series 200 I/O rack
• Match external output power supply to load requirements
• Use appropriate wire gauge based on load current
• Maintain proper grounding for isolation and surge protection Usage Notes:
• Do not exceed per-channel output current rating
• Set debounce time according to field device characteristics
• Follow hot-swap procedures to avoid system disturbance
• Perform periodic contact resistance checks on outputs