Product Details
Configured for safety-critical digital switching in industrial control platforms, the Honeywell FTA-T-08 (FTA-T-08) Field Termination Assembly provides direct physical execution of 4-channel relay-based outputs. The assembly operates with a nominal input voltage of 24 V DC, facilitating secure load switching through fused, high-capacity relay contacts designed for demanding signal processing environments.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FTA-T-08 |
| Brand | Honeywell |
| Dimensions | Standard FTA rack format |
| Operating Temp | Consult system technical manual |
| Power Consumption | ~50 mA at 24 V |
| Output Channels | 4 channels |
| Switched Voltage | 250 V AC / 150 V DC |
Fail-safe State Execution
The FTA-T-08 assembly is engineered to facilitate fail-safe state execution, ensuring that in the event of a control system loss or logic fault, the relay outputs transition to a pre-defined safe state. The integration of 3.15 AT slow-acting fuses per channel provides circuit protection against overcurrent conditions, preventing potential damage to the relay contact assembly. This architecture ensures that safety-critical signals remain isolated and deterministic, protecting the downstream process equipment from erroneous state transitions.
Frequently Asked Questions
Q: Can this module be hot-swapped while the field loop is powered?
A: No. Disconnect all field power and control signals before extracting or inserting the FTA-T-08 assembly to prevent arcing and ensure the safety of the backplane logic.
Q: What is the maximum switching frequency allowed for the output relays?
A: The maximum switched frequency is 20 Hz. Exceeding this rate will accelerate contact degradation and compromise the electrical life expectancy of the relays.
Field Installation Guidelines
- Mounting: Ensure the assembly is securely mounted within the designated cabinet space, allowing sufficient clearance for heat dissipation and cable management.
- Shielding: Use shielded multi-core cables for all digital output signals. The shield must be connected to the system common ground at the entry point to minimize electromagnetic interference.
- Fuse Maintenance: Ensure only 5x20 mm or 5x25 mm slow-acting (3.15 AT) fuses are used for replacement. Verify the fuse rating during each periodic safety check to ensure continued circuit protection.
- Cable Routing: Route output power lines away from sensitive low-level analog signal cabling to prevent inductive coupling and signal crosstalk.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.