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Honeywell 51304511-200
Product Name: PWB NIM/LCN Modem (Network Interface Module Modem)
Overview:
The Honeywell 51304511-200 is a NIM Modem network interface modem board for the TDC 3000 DCS. It serves as the UCN bus transceiver modem core board inside the NIM (Network Interface Module) assembly, responsible for data conversion and signal modulation/demodulation between the LCN (Local Control Network) and the UCN (Universal Control Network).
Detailed content
Technical Specifications:
- Product Type: PWB NIM/LCN Modem
- Operating Voltage: 24 VDC (supplied from rack via gold-finger backplane connector)
- Data Rate: Up to 1.2 Mbps
- Communication Interface: LCN Network
- Mounting Type: Panel Mount (installed inside the NIM chassis, not operating standalone)
- Net Weight: Approx. 0.25 kg (with 1.5 kg total reference from some supplier data)
- Operating Temperature: 0°C to 60°C (cabinet installation)
- Certifications: CE, RoHS compliant
- Interfaces: J2 (UCN A) and J3 (UCN B) dual coaxial redundant bus interfaces; JPI serial port for RX/TX debugging/firmware download/diagnostics; gold-finger backplane connector to NIM main chassis.
Features:
- Dual coaxial UCN A / UCN B interfaces with redundant UCN bus support; automatic switchover upon single-link breakage ensures uninterrupted process.
- Acts as a gateway connecting operator stations, UCN controllers (APM/HPM), and field I/O subsystems.
- Handles bidirectional transmission of real-time process data, alarms, trends, and control commands.
- Millisecond-level deterministic UCN industrial real-time bus.
Applications:
- Core communication bridge within TDC 3000 DCS.
- Power generation, oil refining, chemical, oil & gas, and large-scale papermaking legacy DCS installations.
- Interconnecting HPM/APM process managers, US operator stations, and LCN bus cards.
Installation & Notes:
- Must be installed inside the NIM chassis; cannot operate as a standalone unit.
- Ensure proper seating of the gold-finger connector into the NIM backplane.
- Maintain cabinet temperature within 0°C to 60°C.
- Firmware download and fault diagnosis are performed via the JPI serial port.
