FOXBORO FBM202 8CH Thermocouple mV Isolated Analog Input Module I A Series Compact 200 DCS
- Product Code: FBM202
- Availability: In Stock
FOXBORO FBM202 8CH Thermocouple/mV Isolated Analog Input Module I/A Series Compact 200 DCS
Manufacturer: FOXBORO (Schneider Electric Process Automation)
Part Number: FBM202 (hardware PN P0916FH; matching TA base RH916FH, interconnection cable AD908CC)
Product Type: Thermocouple & millivolt dedicated analog input FBM, built-in isolated RTD cold junction compensation (CJC), full channel galvanic isolation, master-tracker hot redundant support, high-precision temperature measurement module
Matching Platform: Foxboro I/A Series DCS, FCM100E redundant fieldbus gateway, ZCP270/ZCP280 control processors, RH916FH thermocouple passive TA termination base, AD908JQ/AD908CC 25Pin analog shielded cable, DIN rail modular Compact 200 baseplate
Core Function: 8 independent galvanically isolated thermocouple/mV input channels + 1 dedicated isolated Pt100 RTD cold junction compensation channel; native support J/K/T/E/R/S/B/N/C standard thermocouple types; input range -10.5 ~ +69.4mV DC; automatic thermocouple burnout upscale detection; high-resolution Σ-Δ ADC conversion; software configurable integration filter & temperature rate-of-change alarm threshold; 600VAC channel-to-channel & channel-ground isolation withstand; per-channel open/short circuit continuous fault diagnosis; dual redundant 2Mbps HDLC fieldbus communication; bumpless millisecond hot redundant switchover paired with second FBM202; front panel dual-color LED array for RUN/BUS/FAULT/individual channel status; ISA G3 Class G3 harsh industrial PCB; optional anti-salt-fog conformal coating for offshore control rooms; single-width Compact FBM hot-swap capable
1. Product Overview
FBM202 is a dedicated temperature analog input module within Foxboro Compact 200 Series I/O lineup, uniquely designed for thermocouple (TC) and low-level millivolt signal collection, filling the temperature measurement gap between voltage/current AI modules (FBM201D/FBM201E/FBM201) and RTD temperature module FBM203.
Eight fully isolated low-mV channels accept all mainstream industrial thermocouple types, with built-in independent Pt100 RTD cold junction compensation channel to accurately compensate terminal block ambient temperature, eliminating cold junction error without external CJC hardware. The module features automatic burnout detection: when thermocouple wire breaks, the channel reading jumps to full-scale high value to trigger fault alarm, avoiding blind temperature measurement failure risks.
Each channel adopts 600VAC full galvanic isolation to thoroughly eliminate ground loop crosstalk caused by multi-point earthing in complex plant wiring, critical for weak millivolt signal stability. High-precision sigma-delta conversion delivers ultra-low measurement error ±0.03%FS @25°C, CJC compensation accuracy ±0.5°C; user-adjustable integration time filters 50/60Hz power frequency interference from inverters and large motors, stabilizing temperature readings in heavy vibration factory environments.
Continuous per-channel self-diagnostics flag open sensor leads, shorted wiring and signal over-range values, fault codes transmitted to DCS HMI alongside front panel LED indicators for rapid on-site troubleshooting without portable test equipment. Supports master-tracker hot redundant pairing: two FBM202 share one RH916FH TC TA terminal base via redundant adapter, synchronous sampling operation; millisecond-level seamless switchover with zero temperature reading fluctuation if primary module fails, eliminating single-point failure risk of furnace, reactor and boiler critical temperature monitoring loops.
Dual redundant 2Mbps HDLC fieldbus links connect to upstream FCM gateway; slim single-width mechanical design conserves cabinet space, matched with AD908 series 25Pin double-shielded analog cable for centralized marshalling. Compliant with ISA S71.04 Class G3 harsh industrial standard, resistant to dust, high humidity and mild chemical vapors; optional IPC-CC-830 anti-corrosion PCB coating available for salt-laden offshore control environments.
This FBM202 thermocouple/mV input module is standard spare temperature I/O hardware for I/A Series DCS control cabinets, used for new cabinet build, legacy system retrofit and routine temperature measuring channel hardware fault replacement maintenance.
