Description
Product Introduction & Engineering Value
The FBM211 P0914TN provides sixteen group-isolated analog input channels designed for 0-20 mA (including 4-20 mA) field transmitter signals. Channels are organized in isolated groups, delivering strong common-mode noise rejection while maintaining high channel density on a single module.
Each channel uses a multiplexed Sigma-Delta converter with software-configurable integration period. Accuracy is ±0.03% of span with a temperature coefficient of ±50 ppm/°C. The module mounts on a standard 200 Series baseplate, communicates over the 2 Mbps Module Fieldbus, and pairs with specific Termination Assemblies that support either internal loop power or externally powered transmitters.
Technical Specifications
| Parameter | Value |
|---|---|
| Input Channels | 16, group-isolated |
| Input Range | 0 to 20.4 mA DC (current limited ~33 mA per channel) |
| Accuracy (includes linearity) | ±0.03% of span |
| Temperature Coefficient | ±50 ppm/°C |
| Common Mode Rejection | >100 dB at 50/60 Hz |
| Normal Mode Rejection | >35 dB at 50/60 Hz |
| Input Impedance | ~61.9 Ω nominal |
| A/D Conversion | Multiplexed Sigma-Delta, software-configurable integration |
| Power Supply | 24 V DC +5% / –10% (redundant) |
| Power Consumption | 7 W max (up to 11 W with all channels at full scale internal power) |
| Operating Temperature | –20 to +70 °C (–4 to +158 °F) |
| Module Weight | Approx. 284 g |
Field Application & The “Trench” Experience
A Gulf Coast chemical plant needed to add a high density of 4-20 mA transmitter signals in a noisy electrical environment. Sixteen differential pressure and flow transmitters were brought into a single FBM211 P0914TN. Group isolation and high common-mode rejection kept the signals clean despite nearby variable-frequency drives. After mapping the points and verifying accuracy against a calibrated source, the module ran without noise-related faults or recalibration for an extended period.
Typical niche applications:
- High-density 4-20 mA transmitter input in electrically noisy process areas
- Group-isolated analog acquisition for pressure, flow, and level transmitters on continuous process units
- Expansion of existing 200 Series I/O where channel count and noise immunity are both required
P0914TN
P0914TN
Transparency SOP: QA & Testing
- Visual inspection of housing, connectors, and original P0914TN labeling.
- Power-up on dual 24 V supplies with Module Fieldbus communication verification.
- Channel-by-channel 0-20 mA accuracy sweep against a precision current source.
- Common-mode and isolation resistance checks.
- Verification of current limiting and (where applicable) internal loop-power behavior.
- Extended temperature soak while monitoring continuous conversion stability.
The Veteran’s Tech Trap Guide
⚠️ Match the Termination Assembly to the power scheme. Use the correct TA for internal loop power versus externally powered transmitters. Installing the wrong TA will either leave two-wire transmitters without power or create grounding/isolation issues.
PRO TIP: Confirm group isolation boundaries when mixing high-noise and clean signals. All channels in a group share the same isolation reference; segregate noisy signals into separate groups when possible.
⚠️ Watch total current draw with internal loop power. When the module supplies loop power to many two-wire transmitters, power consumption rises. Ensure the baseplate power budget can support the full load.
Dynamic FAQ
Q: How many channels does the FBM211 P0914TN provide? A: Sixteen group-isolated 0-20 mA analog input channels.
Q: What is the accuracy specification? A: ±0.03% of span (includes linearity), with a temperature coefficient of ±50 ppm/°C.
Q: Does the module support internal loop power for two-wire transmitters? A: Yes, when paired with the appropriate Termination Assembly designed for internal power.
Q: What is the common-mode rejection performance? A: Greater than 100 dB at 50 or 60 Hz.
Q: Are New Surplus FBM211 P0914TN units original Foxboro product? A: Yes. Units are original OEM material that have passed full accuracy, isolation, and functional testing.
Q: What warranty is provided? A: 12-month warranty against defects in materials and workmanship from the date of shipment for both New Surplus and fully tested refurbished units.
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