The Honeywell 51304516-100 is a high-performance Smart Transmitter Interface (STI) card designed for the TDC 3000 (Total Plant Management System) and Experion PKS environments, enabling digital communication between the control system and field-mounted smart transmitters.
Product Parameters (Datasheet)
- Model Number: 51304516-100
- Part Type: STI (Smart Transmitter Interface) Card
- System Compatibility: Honeywell TDC 3000 / TPS / Experion PKS
- Slot Requirement: Standard I/O rack or IOP (Input/Output Processor) file
- Communication Protocol: Honeywell DE (Digital Enhancement) protocol
- Channel Capacity: Typically supports 8 or 16 channels depending on the specific FTA (Field Termination Assembly) used
- Operating Voltage: 24V DC (System supplied)
- Power Dissipation: Approximately 4-6 Watts
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Humidity: 5% to 95% RH (Non-condensing)

Country of Origin
This specialized control hardware was engineered and manufactured in the United States by Honeywell Process Solutions.
Application Fields
The 51304516-100 interface is widely used in legacy and upgraded industrial facilities, including:
- Oil & Gas Refineries: Interfacing with high-precision pressure and temperature transmitters on distillation columns.
- Chemical Processing: Managing digital data from flowmeters and level sensors in hazardous areas.
- Power Generation: Monitoring steam and water parameters in boiler control loops.
- Pulp & Paper: Integrating smart field instrumentation across large-scale production lines.
- Water Treatment: Communicating with remote chemical dosing and turbidity sensors.
Product Usage Instructions
- Chassis Preparation: Ensure the IOP or I/O file has a vacant slot. Check that the backplane pins are straight and clean.
- ESD Safety: This card contains highly sensitive CMOS components. Wear a grounded ESD wrist strap before removing the card from its protective anti-static bag.
- Installation: Align the card with the guide rails and slide it firmly into the slot until the connectors seat fully. Secure the front-panel captive screws.
- Configuration: Use the Honeywell Engineering Station (NCF/Configuration tools) to define the transmitter type (e.g., ST3000) and the DE communication parameters for each channel.
- Wiring: Connect the field wiring via the appropriate Field Termination Assembly (FTA). The STI card powers the transmitter and receives the digital signal over the same two wires.
Product Technical Description
The 51304516-100 acts as the digital bridge between the field and the control room. Technically, it utilizes the Honeywell Digital Enhancement (DE) protocol, which is a robust, bidirectional communication method. Unlike standard 4-20mA analog signals, the STI card receives high-resolution digital data, status information, and diagnostic alerts directly from the transmitter’s microprocessor. This allows the TDC 3000 system to perform remote ranging, zeroing, and health monitoring, significantly reducing the need for field-based maintenance and improving overall loop accuracy.
Q&A (Common Questions)
Q: Can this card read standard 4-20mA analog transmitters? A: This specific card is designed for Honeywell’s DE digital protocol. While many Honeywell transmitters can output both, the STI card is optimized for the digital signal to provide higher precision and diagnostics.
Q: Is the 51304516-100 hot-swappable? A: In most Honeywell TDC 3000 and Experion configurations, I/O cards are hot-swappable, but it is always recommended to check the system-specific redundancy status before removal.
Q: What is the difference between this and the -200 or -300 versions? A: The suffix (-100) denotes the specific hardware revision or component grade. Later revisions may offer improved noise immunity or updated component longevity.
Q: Does this card require a separate power supply for the field instruments? A: No, the STI card typically provides the necessary “loop power” to the field transmitters through the FTA connections.
Similar Model Recommendations
- Honeywell 51304516-200 (Updated revision of the STI card)
- Honeywell 51304754-100 (Analog Input Processor)
- Honeywell 51402497-200 (STI Field Termination Assembly)
- Honeywell 51309135-100 (High-Level Analog Input card)
- Honeywell 51304362-100 (Smart Transmitter Interface for specialized racks)
For more information on the Honeywell 51304516-100 and our full range of Honeywell TDC 3000 and Experion spare parts, please contact our technical sales team.
