Product Overview

The Honeywell FTA-T-01 is a high-reliability Field Termination Assembly (FTA) designed specifically for the Fail-Safe Control (FSC) system architecture. This module acts as the physical and electrical bridge between external field sensing devices and the system's internal I/O interconnection cables. It is engineered to handle 24 discrete digital input channels, providing a centralized and organized terminal point that simplifies both initial installation and long-term maintenance of safety-critical control loops.

By consolidating field wiring onto a DIN rail-mounted PC board, the FTA-T-01 minimizes cable clutter within the control cabinet. Its fail-safe design ensures that digital signals from the plant floor are accurately transmitted to the DCS, making it an essential component for Emergency Shutdown (ESD) systems and Burner Management Systems (BMS) where signal integrity is a fundamental safety requirement.

Technical Characteristics and Circuit Protection

The FTA-T-01 is built to industrial standards, emphasizing circuit isolation and localized protection to prevent system-wide failures.

• Segmented Group Protection: The 24 digital input channels are partitioned into three independent groups of eight. This modular grouping ensures that a localized electrical fault only impacts a single segment rather than the entire assembly.

• Integrated Safety Fusing: Each of the three channel groups is protected by an individual 250 mA slow-acting fuse. This prevents overcurrent conditions in the field from damaging sensitive upstream PLC or DCS modules.

• High Voltage Tolerance: The assembly is rated to accommodate field signal levels up to 150 Vdc, providing a wide operational envelope for various industrial sensing technologies.

• Secure Screw Terminals: Features heavy-duty screw-type terminal blocks that ensure vibration-resistant connections and low contact resistance for high-fidelity signal transmission.

• Standardized Mounting: The compact 145 x 70 x 65 mm footprint is designed for standard 35mm DIN rail mounting, allowing for high-density installation in compact control panels.

• Compliance and Certification: Fully compliant with CE and UL standards, meeting the rigorous safety and quality benchmarks required for global industrial deployment.

Technical Specifications

• Manufacturer: Honeywell

• Model Number: FTA-T-01

• Product Series: Fail-Safe Control (FSC) System

• Module Type: Field Termination Assembly (FTA)

• Channel Density: 24 Digital Input Channels

• Protection: 3 x 250 mA Slow-acting fuses (1 per 8 channels)

• Maximum Voltage: 150 Vdc

• Dimensions: 14.5 x 7.0 x 6.5 cm

• Weight: 0.4 kg

• Mounting Type: DIN Rail

• Origin: USA

Industrial Applications

The Honeywell FTA-T-01 is a staple in high-availability automation environments:

• Safety Instrumented Systems (SIS): Serving as the termination point for emergency stop buttons and safety interlocks.

• Oil and Gas Facilities: Interfacing field-side limit switches and pressure transmitters with the FSC safety manager.

• Chemical Processing: Managing digital inputs for hazardous area monitoring and automated reactor protection.

• Building Management: Integrating discrete fire and security sensor signals into a centralized control backbone.