Honeywell 51401583-200 Network Interface Card

Honeywell 51401583-200 Network Interface Card

The Honeywell 51401583-200, also cataloged as the 51401583 network interface card, serves as a dedicated NGI board for managing data exchange between the Local Control Network (LCN) and external communication links within Honeywell TPMS and TDC 3000 architectures. It executes independent routing functions inside 10‑slot Split Node or Multinode chassis.

Hardware Specifications

4-20 mA HART Loop Protocol & Fieldbus Isolation Behavior

Although the NGI board handles digital network traffic rather than analog loops, its internal channel‑to‑channel isolation prevents interference when installed near Honeywell I/O assemblies carrying 4‑20 mA HART or Fieldbus/PA signals. The board’s grounding and shielding layout minimizes coupling into adjacent low‑level channels, ensuring stable LCN routing performance. Cold junction compensation (CJC) circuits in nearby modules remain unaffected due to the NGI’s non‑analog, low‑thermal‑load design.

Frequently Asked Questions

Q: Can the NGI board be hot‑swapped in a Split Node chassis? A: No. Removal or insertion must occur with the chassis de‑energized to avoid LCN bus faults.

Q: Does the module directly interface with standard UCN coax lines? A: No. Carrier Band and fiber networks are supported; coax UCN requires dedicated physical‑layer integration.

Q: Does high throughput affect backplane timing? A: The NGI board manages routing independently; backplane timing is governed by the host node processor.

Field Installation Guidelines

• Ensure proper seating in the cardfile to maintain LCN backplane alignment.
• Maintain separation between network cabling and high‑energy conductors to reduce induced noise.
• Verify grounding continuity to preserve shielding effectiveness.
• Avoid excessive bending of fiber or Carrier Band cabling to maintain signal integrity.
• Confirm connector engagement before energizing the node.