- Use FBM208 only for its documented redundant analog I/O function with output readback
- Confirm the exact module identity, termination hardware and cable before replacement
- Preserve field wiring, channel configuration, diagnostics and control state before removal
Foxboro FBM208 is a redundant four-channel analog I/O module with output readback for high-availability 0-20 mA Foxboro DCS control loops.
FBM208 is the exact functional designation; RH914TB is the current module part number; RH916NN is separate redundant-adapter hardware. FBM208b is a different model and is not used here.
Before replacement, verify the exact label, termination hardware, cable, signal limits, field wiring, saved configuration and supported system environment.
Availability, condition, price, and shipping time for FBM208 are confirmed during quotation.
Foxboro FBM208 Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Treat output readback as a core FBM208 selection requirement
- Investigate any output deviation greater than ±2% before returning a loop to service
- Follow an approved procedure when testing the over-readback power cut
- Install the pair in adjacent baseplate slots
- Use the documented RH916NN redundant adapter
- Preserve termination, cable and active/tracker identities
- Inject every used input and command every used output
- Measure actual output current independently and compare readback
- Verify scaling, alarms, failover, BAD status and diagnostics
- High-availability single-input/single-output control
- Redundant 4-20 mA input acquisition
- Readback-monitored redundant analog output control