The Schneider Electric BMXFTB2820, also cataloged as the BMXFTB2820 Removable Connection Block, operates as a dedicated hardware component for field wiring termination within Modicon X80 I/O platforms. The module provides direct electrical interfaces for up to 28 independent termination lines, routing discrete and analog signals from field instrumentation to compatible Modicon M340 and M580 rack modules. It uses a spring clamp tension system to establish permanent physical contact with solid or stranded conductors without the use of threaded fasteners.
| Parameter | Specification |
|---|---|
| Model | BMXFTB2820 |
| Brand | Schneider Electric |
| Origin | China |
| Weight | 0.07 kg |
| Dimensions | 32 x 100 x 40 mm |
| Operating Temp | -25 to +70 deg C |
| Power Consumption | Passive (0 mA) |
| Connection Type | Spring clamp terminals |
| Number of Terminals | 28 positions |
| Enclosure Rating | IP20 |
| Wire Size Supported | 0.25 to 2.5 mm² (AWG 24 to 14) |
| Module Compatibility | 28-way compatible Modicon X80 I/O modules |
The mechanical structure of this 28-way connection block interfaces directly with high-density I/O modules operating across Profinet / EtherNet/IP deterministic networks. By facilitating compact terminal grouping, the component enables precise I/O density scaling within a standardized chassis footprint. The direct-insertion spring mechanism maintains constant contact force under vibration, preventing electrical noise from impacting the backplane bus communication velocity or degrading signal conversion accuracy.
Q: Can this terminal block be uncoupled while the host I/O module is actively powered?
A: The mechanical architecture allows the block to be removed from the front of the module; however, field-side loops must be isolated prior to removal to prevent transient voltage spikes or active channel disruption.
Q: What are the maintenance requirements for the spring clamp termination points compared to screw terminals?
A: The spring clamp configuration requires zero periodic torque validation. The internal tension leaf automatically compensates for wire settling, thermal expansion, and mechanical vibration over time.
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