FBM237 RH914XS high-reliability isolated analog output module

The FBM237 RH914XS is a high-reliability isolated analog output module developed by Foxboro for its I/A Series Distributed Control System (DCS). It specializes in converting digital control signals from the DCS into precise analog output signals to drive field actuators (e.g., control valves, variable frequency drives), and is widely used in harsh industrial environments due to its robust design and redundant capabilities. Below is its detailed information:

1. Core Technical Specifications

Parameter	Details
Output Channels	8 independent analog output channels; each channel is fully isolated from others and the backplane.
Supported Output Signals	Primary: 4–20mA DC (sink/source configurable); Optional: 0–10V DC, 1–5V DC.
Accuracy	±0.1% of full scale (includes linearity, hysteresis, and repeatability); temperature coefficient: ±25ppm/°C (minimizes drift in temperature-fluctuating environments).
Resolution	12-bit (ensures fine-grained control for precision-dependent scenarios, such as valve positioning).
Load Capacity	Maximum load resistance: ≤750Ω (compatible with most industrial actuators and long-distance wiring).
Power Supply	24V DC ±10% (redundant power input supported); maximum power consumption: ≤7W (low energy consumption for stable operation).
Isolation Rating	Channel-to-channel isolation: ≥600V AC (1 minute); Module-to-backplane isolation: ≥2500V AC (1 minute) (prevents ground loops and electromagnetic interference).