Redundant HART I/O Module | Foxboro P0917XV FBM218
Manufacturer: Foxboro
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Part Number: FBM218 P0917XV
Condition：New with Original Package
Product Type: Analog I/O Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Foxboro P0917XV FBM218 Redundant HART I/O Module
The Foxboro FBM218 P0917XV, also cataloged as the FBM218 Redundant HART I/O Module, operates as a dedicated hardware component for analog input acquisition and HART signal execution within Foxboro Evo platforms. The unit processes 16 isolated 4-20 mA analog inputs via 12-bit A/D converters and drives 8 isolated HART-enabled analog outputs over dual 2 Mbps HDLC fieldbus connections.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | Foxboro FBM218 P0917XV |
| Brand | Foxboro |
| Origin | United States |
| Weight | 0.3 kg |
| Dimensions | 63.5 x 124.46 x 307.34 mm |
| Operating Temp | 0 deg C to +60 deg C (inputs), -20 deg C to +70 deg C (outputs) |
| Power Consumption | Standard Backplane Bus Load |
| Product Type | Redundant Analog Input & HART Output Module |
| Input Channels | 16 analog inputs (4-20 mA) |
| Output Channels | 8 analog outputs with HART FSK |
| Input Isolation | Channel-to-channel and channel-to-system |
| Output Isolation | Galvanically isolated per channel and logic/ground |
| Resolution | 12-bit A/D conversion |
| Accuracy | +/-0.1% of full scale |
| Redundancy | Dual-module operation for fault tolerance |
| Communication | Redundant 2 Mbps HDLC Fieldbus |
HART Communication & Channel-to-Channel Isolation
The Foxboro FBM218 P0917XV integrates independent FSK modems across its 8 output channels, enabling host-level 4-20 mA HART loop protocol interaction at two digital message cycles per second. Galvanic isolation barriers eliminate potential earth loops between channels, backplane logic, and local grounds. This channel-to-channel isolation safeguards 12-bit A/D signal conversion accuracy (+/-0.1% full scale) from common-mode voltage spikes and electrical interference generated in crowded field panels.
Frequently Asked Questions
Q: How does the master and tracking module pairing operate during primary hardware failure?
A: Dual FBM218 modules operate in paired fault-tolerant configuration where the primary master module executes control and output updates while the secondary tracking module mirrors bus states. Upon master failure, execution switches to the tracking module instantly without disturbing output loop current.
Q: Does the module support burst mode communication for connected field instruments?
A: No. Each dedicated FSK modem executes master queries requesting and receiving two digital responses per second using standard HART point-to-point commands; HART burst communication mode is not supported.
Q: Can the module withstand hot-swapping under powered backplane conditions?
A: Yes. Technicians can insert or remove the module online on an active baseplate without disrupting active communication on the redundant 2 Mbps HDLC fieldbus or tripping adjacent system slots.
Field Installation Guidelines
Observe the following mechanical and electrical grounding practices during field deployment:
- Insert the module into its designated baseplate slot and push until the backplane bus connectors engage firmly.
- Tighten retaining chassis screws to establish continuous low-impedance electrical contact with the cabinet ground rail.
- Keep 4-20 mA signal wires separated from high-voltage AC lines inside panel conduits to prevent noise coupling.
- Ground cable drain shields at a single point on the main instrument Earth bus bar to block ground loop currents.
- Cover unpopulated baseplate slots with protective blanking plates to maintain design convection airflow across adjacent module heat sinks.