Discrete I/O Module | Foxboro FBM219 I/A Series
Manufacturer: Foxboro
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Part Number: FBM219
Condition：New with Original Package
Product Type: Digital I/O Cards
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Foxboro FBM219 Discrete I/O Module
The Foxboro FBM219, also cataloged as the FBM219 Discrete I/O Interface Module, operates as a dedicated hardware component for discrete signal acquisition and control execution within Foxboro Evo and I/A Series platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FBM219 |
| Brand | Foxboro |
| Origin | United States |
| Weight | 0.185 kg |
| Dimensions | 10.2 x 4.5 x 11.4 cm |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | Standard Backplane Bus Load |
| Input Channels | 24 isolated voltage inputs |
| Output Channels | 8 isolated switch outputs |
| Input Protection | Current-limited to 2.5 mA |
| Signal Update Rate | Less than 100 ms |
| Communication | Redundant Fieldbus via FCM/FCP |
HART Protocol & Channel Isolation Performance
The hardware incorporates channel-to-channel and channel-to-system galvanic isolation barriers across all 24 input and 8 output circuits to prevent ground loop currents in high-density rack configurations. Although HART loop protocol functions are reserved for transmitter-specific series such as the FBM216, the FBM219 maintains dedicated current-limiting hardware on each input circuit to hold currents at 2.5 mA, protecting internal processing logic from external field wiring short circuits and transient voltage spikes.
Frequently Asked Questions
Q: How does the module handle backplane fieldbus communication failures in redundant configurations?
A: In dual-module redundant setups, the secondary tracking module monitors the primary module heartbeat across the redundant fieldbus. If the primary module fails or loses backplane communication, the secondary unit takes over I/O execution without interrupting field loop states.
Q: Are the 24 discrete input channels compatible with HART digital field devices?
A: No, the FBM219 interface channels are strictly engineered for discrete voltage input sensing and switch output driving. Applications requiring HART protocol communication must utilize modules such as the FBM216 series.
Q: What physical isolation mechanisms prevent field transients from damaging the system backplane?
A: Individual galvanic isolation barriers isolate each channel from adjacent field wiring, chassis ground, and system backplane logic circuits, suppressing noise coupling and eliminating ground potential differences.
Field Installation Guidelines
- Slide the module vertically into the designated baseplate mounting slot until the rear backplane connectors seat fully.
- Tighten the top and bottom retaining screws to establish low-impedance mechanical grounding with the baseplate metal frame.
- Keep field discrete wiring separated from high-voltage AC lines inside cabinet wire ducts to reduce inductive noise.
- Ground all field cable shields at a single ground bar near the cabinet entry panel to eliminate circulating ground loop currents.
- Verify that field supply voltages align with input limits and output switch ratings before energizing connected field circuits.