The Comnet FDC24NLSFP 24 Channel Duplex Contact Closure Transceiver is engineered for efficient transmission of up to twenty-four independent duplex dry switch or relay contact closures via a single SFP optical port or a 4-wire RS-422 copper circuit. This versatile unit supports an expandable RS-422 data bus, enabling connection of multiple uniquely addressed units, while ensuring robust and error-free transmission of contact closure information, making it ideal for various monitoring and control applications.
Comnet FDC24NLSFP Key Features
- Multiple Unit Support: Supports multiple units with the same address, allowing for one-to-many or many-to-one contact closure scenarios, enhancing flexibility in system design.
- High Capacity Transmission: Transmits up to twenty-four duplex independent dry switch or relay contacts over one SFP fiber port or 4-wire RS-422 copper circuit, streamlining connectivity.
- Environmental Compliance: Meets full compliance with NEMA TS-1/TS-2 and Caltrans Specification for Traffic Signal Control Equipment, ensuring reliable performance in challenging conditions.
- Status Indication: Equipped with indicating LEDs for monitoring contact closure status and summary fault, providing real-time feedback for operational awareness.
- Cascadable Data Bus: Unique design allows easy system expansion with up to 12 uniquely addressed units (288 unique duplex contacts) over a single SFP port or RS-422 circuit.
- Automatic Current Limiting: Features automatic resettable solid-state current limiters to protect against overloads, enhancing durability.
- Hot-Swappable Modules: Allows for hot-swapping of rack modules, minimizing downtime during maintenance or upgrades.
- Versatile Mounting Options: Interchangeable between stand-alone or rack mount configurations for flexible installation.
Comnet FDC24NLSFP Detailed Specifications
| Feature | Detail |
| Channels | 24 duplex contact closures |
| Interface | SFP optical port or 4-wire RS-422 copper circuit |
| Data Bus | Expandable RS-422 data bus supporting up to 12 units |
| Compliance | NEMA TS-1/TS-2 and Caltrans Specification |
| LED Indicators | For monitoring contact closure status and summary fault |
| Current Limiting | Automatic resettable solid-state current limiters |
| Mounting Options | Wall, rack, or DIN-rail mounted |
| Temperature Range | Designed for varied ambient operating conditions |



















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