The Foxboro FCM2F2, also cataloged as the P0914YZ Fiber Optic Fieldbus Extender, operates as a dedicated hardware component for converting electrical fieldbus signals into optical signals within Foxboro I/A Series distributed control system networks. Configured to interface directly with 200 Series Fieldbus Modules, the device executes data transmission across distances up to 2 kilometers via multimode fiber media.
| Parameter | Specification |
|---|---|
| Model | FCM2F2 (P0914YZ) |
| Brand | Foxboro |
| Origin | USA |
| Weight | 284 g (Module only), 2.7 kg (Shipping package baseline) |
| Dimensions | 102 x 45 x 104 mm |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | 5 W max |
| Transmission Rate | 2 Mbps (HDLC Fieldbus protocol) |
| Power Requirements | 24 VDC (+5%, -10%) |
| Fiber Type | Multimode graded-index glass fiber (62.5 um core / 125 um cladding, 0.275 NA) |
| Maximum Distance | 2 km per fiber segment |
| Connectors | ST-type fiber connectors |
| Storage Temperature | -40 to +70 deg C |
| Humidity | 5% to 95% non-condensing |
| Vibration | 0.05 g rms (random), 5 to 500 Hz |
| Shock | 15 g, 20 ms half-sine |
| Contamination Rating | Class G3 (Harsh) per ISA S71.04 |
The module utilizes optical conversion pathways to establish complete galvanic isolation between distant FBM baseplate nodes. By shifting signal transmission from copper media to a multimode graded-index glass fiber architecture, it neutralizes common-mode voltage differences and eliminates ground loop currents across long cable runs. The optical link budget accommodates a signal loss allowance of 1 dB/km at a 1300 nm wavelength and 3.6 dB/km at an 850 nm wavelength, maintaining 2 Mbps HDLC Fieldbus protocol line balance and cross-talk suppression without the need for external Balun hardware.
Q: Does the FCM2F2 support hot-swap execution when installed in a redundant pair?
A: Yes. In a redundant configuration where two FCM2F2 modules are mounted on a compatible 200 Series baseplate, an individual module can be hot-swapped without interrupting the active 2 Mbps fieldbus traffic. The secondary module maintains continuous optical line drive throughout the swap duration.
Q: What indicates an optical signal loss or a transceiver hardware fault on the module faceplate?
A: Real-time traffic, directionality, and internal diagnostic status are monitored by integrated LED indicators on the front panel. A loss of signal or a protocol synchronization fault drops the specific status line, causing the I/A Series controller to generate a system alert while the redundant module takes over the communication path.
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