Description
Honeywell 51305517-100
Technical Specifications
- Network interfaces: 1 RJ45 Ethernet port, 1 RS485 Modbus port
- Protocols: Modbus TCP, Modbus RTU, OPC DA
- Network speed: 10/100 Mbps auto-negotiation Ethernet
- Backplane interface: TDC3000 LCN bus
- Supply power: 5 V DC from backplane
- Operating temperature: 0 °C to +60 °C
- Maximum connected tags: 1000 process tags
Functional Features Protocol conversion between TDC LCN proprietary format and open Modbus/OPC standards. Dual Ethernet and serial ports, supports simultaneous connection to SCADA and serial devices. On-board data buffering, stores up to 1000 process tags for external polling. On-board LEDs indicate network link, data activity and fault status. IP address and Modbus mapping configurable via TDC system engineering station. Isolated ports, blocks ground loop interference between plant network and TDC system.
Application Scenarios Legacy TDC3000 integration with modern SCADA systems Historian data feed from TDC3000 to plant data platforms Third-party device communication gateway for TDC systems Spare part replacement for failed communication gateway boards
Performance Parameters
- Communication latency: ≤10 ms
- Ethernet isolation: 1500 VAC
- Modbus RTU baud rate: Up to 115200 bps
- Tag refresh rate: 1 second minimum
- Mean time between failures: 500,000 hours
Material Composition FR4 PCB substrate Ethernet PHY chip Protocol conversion processor Optocoupler isolation circuits RJ45 and RS485 connectors Metal shielded front panel
Structural Features Standard Eurocard dimensions, inserts into dedicated communication slots. Front panel houses RJ45 Ethernet port, RS485 terminal block and status LEDs. Metal shielded enclosure contains high-speed network electromagnetic radiation. Isolation barrier separates plant network side and TDC LCN side.
Working Principle The board reads process tag data from the TDC LCN network over the backplane. Data is stored in on-board buffer memory, mapped to Modbus and OPC register addresses. External SCADA and historian systems poll the board over Ethernet or RS485, reading mapped process values. Write commands from external systems are translated back to TDC LCN format, forwarded to the process manager for execution. Optocoupler isolation separates plant network ground from TDC system ground, preventing ground loop damage.
Installation Requirements Insert the board into the dedicated communication slot in the LCN cabinet. Connect Ethernet patch cable to the RJ45 port, RS485 devices to the serial terminals. Assign IP address and configure tag mapping in TDC engineering software. Verify data read/write communication from the external SCADA system after power-up.
Usage Notes IP address must not conflict with other devices on the plant network. Shielded cable for RS485 connection reduces EMI-induced communication errors. Tag mapping changes require a board reset; perform during maintenance windows. Never connect unprotected public networks directly to the board, add firewall protection for external access.
