Model Foxboro FBM206 Module Type Discrete Input (DI) Number of Channels 16 independent input channels. Input Type Dry Contact (preferred) or Voltage Sourcing (typically 48 V DC field-supplied). The module itself sinks current to detect a closed contact. Logic Levels OFF (Logic 0): Open circuit or voltage < 5V DC ON (Logic 1): Closed contact to field common, or voltage > 15V DC. System Compatibility Foxboro I/A Series DCS. Must be installed in a compatible FBM fieldbase (e.g., FBM200 series). Update Rate Very fast, typically on the order of milliseconds for state change detection. Power Supply Powered by the fieldbase (typically +5V from the power supply module). The field device loop is powered externally (for dry contact) or by a field-supplied voltage source. Isolation Channel-to-Channel: Groups of channels are typically isolated. Channel-to-Bus: Optical isolation provides protection for the system bus from field-side electrical faults. Field Wiring Field wiring is terminated to a removable screw terminal block on the associated fieldbase. A common return terminal is provided for groups of inputs. Diagnostics Includes internal diagnostics for module health (e.g., module failure, communication loss). LED Indicators Module status LEDs (e.g., OK, ACTIVE, FAIL) and often per-channel status LEDs that show the real-time state (ON/OFF) of each input. Environmental Designed for industrial environments. Operating temperature typically 0 to 60°C (32 to 140°F).
