Model Foxboro FBM217 Module Type Analog Output (AO) Number of Channels 8 independent, isolated output channels. Output Signal 4 to 20 mA DC, user-scalable, per channel. Resolution 16-bit (high resolution for precise control). Accuracy Typically ±0.05% of full scale at 25°C (77°F). Load Capacity 0 to 750 Ohms (maximum loop resistance). Update Rate Configurable, typically every 40 to 70 milliseconds for all channels. System Compatibility Foxboro I/A Series DCS. Must be installed in a compatible FBM fieldbase (e.g., FBM200 series). Power Supply Powered by the fieldbase (typically +5V and ±12V from the power supply module). The 4-20 mA output power is sourced from the module (sourcing output). Isolation Channel-to-Channel: Yes, channels are isolated from each other. Channel-to-Bus: 500 V AC minimum. Redundancy Supports redundant (1:1) configuration. A primary and a backup FBM217 can be paired for critical control loops. Automatic switchover occurs upon failure. Diagnostics Includes comprehensive internal diagnostics for fault detection (e.g., module failure, communication loss, field short-circuit). LED Indicators Module status LEDs (e.g., OK, ACTIVE, FAIL) and often per-channel status indicators. Connections Field wiring is terminated to a removable screw terminal block on the associated fieldbase. Environmental Designed for industrial environments. Operating temperature typically 0 to 60°C (32 to 140°F).
