Technical Specifications
Compatible Termination Assemblies & Cables
Note: The P0916DC termination cable is a separate accessory and is required for connecting field wiring to the FBM204 module.
Key Features & Benefits
Combined Analog Input and Output Capability
The FBM204 integrates four analog input channels and four analog output channels on a single module, reducing module count in the rack and cutting rack slot consumption by approximately half compared to separate AI and AO cards. This hybrid design simplifies wiring, lowers overall system cost, and conserves valuable cabinet space for future expansion .
High-Precision Signal Conversion
Each input and output channel delivers ±0.03% of span accuracy with 13-bit output resolution. The module employs Sigma-Delta data conversion on a per-channel basis, providing new analog input readings every 25 ms with a configurable integration period to remove process noise and power line frequencies .
Redundant Fieldbus Architecture
As a main-type FBM, the module independently connects to the redundant 2 Mbps Fieldbus. If one Fieldbus segment fails, the module automatically switches to the alternate path, maintaining continuous data exchange with the control processor without process interruption .
Configurable Fail-Safe Output Behavior
The module supports per-channel fail-safe configuration with options for Hold (maintain last output) or Fallback (output a configured fallback value) during Fieldbus faults. Fallback data is individually configurable per output channel, ensuring that control valves behave predictably during abnormal conditions.
Channel-to-Channel Galvanic Isolation
Each channel is individually isolated from all other channels and earth. The module withstands 600 V AC for one minute between any channel and ground, or between any two channels, without damage. This isolation prevents field faults, ground loops, and electrical noise from propagating between channels or damaging upstream electronics .
HART Compatibility
The FBM204 channels meet the impedance requirements for a HART high-impedance device and can be used in a HART loop without interfering with HART signals between the field device and a Hand-Held Communicator. For FoxCom or HART transmitters used as input devices, a 200 Ω in-line resistor (P0902VY) must be added in series with the transmitter .
Hot-Swap Capability
The FBM204 supports live insert and removal on an energized I/A Series baseplate. The module can be removed or replaced without removing field device termination cabling, power, or communication cabling, dramatically reducing Mean Time to Repair (MTTR) and enabling maintenance during continuous process operations .
Rugged Compact Construction
The module features a compact design with a rugged extruded aluminum exterior for physical protection of circuits. It is rated for Class G3 (Harsh) environmental contamination per ISA S71.04, making it suitable for corrosive chemical plants, coastal installations, and other demanding industrial settings .
Recommended Related Models
Compatible I/A Series Components:
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Control Processors: CP60, FCP270, FCP280
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Fieldbus Communication Modules: FCM10E, FCM2F2
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Termination Cable: P0916DC (Type-1, 3 m)
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Termination Assembly: P0916AG
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Output Bypass Station: For output maintenance support
Frequently Asked Questions (FAQ)
Q1: What is the primary function of the Foxboro FBM204 (P0916DC)?
The FBM204 is a mixed analog Input/Output module for the I/A Series and Foxboro Evo DCS. It provides four 0-20 mA analog input channels for process measurement and four 0-20 mA analog output channels for driving control valves and actuators, all communicating via the redundant 2 Mbps Fieldbus .
Q2: What is the difference between P0916DC and P0914SY?
P0916DC is the part number for both the FBM204 module (in some listings) and the Type-1 termination cable assembly (3 m, 50-pin D-SUB) that connects the FBM baseplate to field wiring. P0914SY (or RH914SY) is the module part number used in other catalogs. Always verify with your supplier whether you are ordering the module or the cable .
Q3: What is the input and output accuracy of the FBM204?
Both input and output channels provide ±0.03% of span accuracy (including linearity) with an accuracy temperature coefficient of ±50 ppm/°C .
Q4: What is the maximum load for the output channels?
Each output channel can drive a maximum load of 750 Ω. Exceeding this limit may cause output current to clamp below the full 20 mA range .
Q5: Can the FBM204 be used with HART transmitters?
Yes. The module channels are electrically compatible with HART signals. For FoxCom or HART transmitters used as input devices, a 200 Ω in-line resistor (P0902VY) must be added in series with the transmitter .
Q6: Can the FBM204 be replaced without shutting down the system?
Yes. The FBM204 supports hot-swap replacement on an energized I/A Series baseplate. Field wiring, power, and communication cables remain undisturbed, and the redundant Fieldbus ensures no loss of communication during the swap .
Q7: What is the difference between the standard FBM204 and the Compact FBM204?
The standard FBM204 mounts on a Modular baseplate accommodating up to 4 or 8 FBMs. The Compact FBM204 has a narrower design and mounts on a Compact 200 Series baseplate accommodating up to 16 compact FBMs. Both share the same 4 AI + 4 AO channel configuration and 0-20 mA range .
Q8: What environmental conditions can the FBM204 withstand?
The module is rated for Class G3 (Harsh) environmental contamination per ISA S71.04. Operating temperature is -20°C to +60°C, with storage from -40°C to +85°C. Humidity range is 5% to 95% non-condensing .
Q9: What is the input channel impedance of the FBM204?
The input channel impedance is 61.5 Ω nominal .
Q10: What certifications does the FBM204 hold?
The FBM204 holds UL/UL-C listing for Class I, Groups A-D, Division 2, T4; DEMKO ATEX certification as Ex nA IIC T4 for Zone 2; and meets European EMC Directive requirements (EN61326-1:2013 Class A Emissions, Industrial Immunity) .
Q11: Does this module come with a warranty?
Yes. This offering includes a 1 Year Warranty on the module. Verify warranty terms with your supplier before purchase.
