Product Short Description
Product Name: Fail-Safe Digital Output Field Termination Assembly (FTA)
Product Overview: The FTA-T-02 is a fail-safe digital output FTA for Honeywell’s Fail-Safe Controller system family. It provides 24 output channels grouped into six isolated sets of four, ensuring stable and fault-tolerant control with automatic transition to a safe state on signal failure or power loss.
Description
Technical Specifications:
- Product Type: Fail-Safe Digital Output FTA
- Channels: 24 (6 groups of 4)
- Operating Voltage: 24 V DC / 48 V DC / 60 V DC
- Max Voltage Rating: 36 V AC / 50 V DC (Overvoltage Cat 3); 125 V AC / 150 V DC (Overvoltage Cat 2)
- Max Continuous Current per Channel: 2 A
- Terminal Type: Screw terminals
- Max Wire Diameter: 0.25 cm² (AWG 14)
- Strip Length: 0.7 cm (0.28 in)
- Tightening Torque: 0.5 Nm (0.37 ft-lb)
- Dimensions (L×W×H): 14.5 × 7 × 5.7 cm
- DIN Rail: TS32 / TS35 × 7.5; required rail length 14.6 cm
- Approvals: CE, UL
- Protection: IEC 1010 (1990) overvoltage categories 2 and 3
Key Features: Fail-safe design transitions to safe state on fault or power loss; 24 isolated channels for simplified wiring and improved protection; wide voltage range (24/48/60 V DC); compact DIN-rail mounting; CE and UL compliant.
Working Principle: The FTA interfaces between system interconnection cables (SIC) from the controller and external field wiring via screw terminals. On loss of communication or power, each group’s output is driven to its predefined safe state.
Application Scenarios: Distributed Control Systems (DCS); Emergency Shutdown (ESD) units; fail-safe PLC architectures; safety-critical and automation control applications requiring reliability and redundancy.
Installation Requirements: Mount on TS32 or TS35 × 7.5 DIN rail using 14.6 cm rail length; terminate field wiring with AWG 14 max, 0.7 cm strip, 0.5 Nm torque; observe polarity per group; connect SIC from controller to the FTA’s SIC connectors.
Usage Notes: Ensure the selected operating voltage (24/48/60 V DC) matches the field device requirements; verify overvoltage category rating matches the installation environment; do not exceed 2 A per channel continuous.
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