T8891 Speed Output Field Terminal Assy | ICS Triplex Trusted

ICS Triplex T8891 is a Speed Output Field Terminal Assembly (SOFTA). It works with the Trusted TMR System. This FTA connects field devices to the T8403 digital input module. It handles up to 40 input channels. Each channel has a fused power supply. A green LED shows field power status. SmartSlot supports hot replacement of modules. This unit provides reliable and safe signal termination.

Technical Specifications

• Brand: ICS Triplex
• Model: T8891
• Series: Trusted TMR System
• Type: Speed Output Field Terminal Assy (SOFTA)
• Supply Ratings: N/A – power comes from T8442
• Output Ratings: 3A at 120Vac; 2A at 30Vdc
• RA Part Number: 3AX185
• Terminal Block Type: Screw clamp
• Torque: 0.5 N.m
• Wire Size: 30 to 12 AWG (0.05 to 2.5 mm²)
• Cable Terminations Per TB: 1
• Number of Channels: 40 input channels per FTA
• Field Power Supply: Dual 24 Vdc feeds with diode commoning
• Channel Fuse: 50 mA per channel
• Operating Voltage: 24 Vdc
• Connector: 96-way socket SK1 and SK2 (SmartSlot)
• Temperature Range: 0°C to +60°C (operating)
• Environmental Tolerance: Resists humidity and vibration per industrial standards
• Noise Immunity: High resistance to electrical interference (EMC compliant)
• Line Monitoring: Detects open/short circuit and alarm conditions

Installation Guide

• Mount on standard DIN rail for quick setup.
• Use screw clamp terminals with 0.5 N.m torque.
• Wire size: 30-12 AWG (0.05-2.5 mm²).
• Connect field power via the 5-way terminal block (PWR TB).
• Wire input signals using 2-wire arrangements on 12 three-way and 2 two-way terminal blocks.
• Insert the 96-way cable from T8403 module into SK1 socket.
• SmartSlot connector SK2 is for Version 1; not used for Version 2.
• Only one cable termination allowed per terminal block.

Debugging & Maintenance Convenience

• Green LED indicates field power integrity at a glance.
• Per-channel fuse simplifies fault isolation.
• SmartSlot allows hot replacement without system shutdown.
• Easy access to terminal blocks for wiring checks.
• Line monitoring components help diagnose loop issues.
• No complex tools needed for routine inspection.

Compatibility Information

• Designed for Trusted TMR 24 Vdc Digital Input Module T8403.
• Works with industry standard 2-wire field devices.
• Compatible with SmartSlot Version 1 and 2 (SK2 not used in V2).
• Accepts dual 24 Vdc field power supplies from T8442.
• Supports DIN rail mounting in any standard enclosure.

Certifications & Standards

• Complies with Trusted TMR System safety standards.
• Designed for high availability and fault-tolerant applications.
• EMC compliant for industrial environments.
• RoHS and CE marked (typical for ICS Triplex).

Package Contents

• 1 x ICS Triplex T8891 SOFTA assembly.
• Terminal blocks pre-installed (screw clamp type).
• Product documentation sheet (quick start).
• No additional cables included – order separately.

Warranty & Shipping

• 12-month warranty from date of shipment.
• Covers manufacturing defects and material faults.
• Shipping methods: FedEx, UPS, DHL – worldwide express.
• Tracking number provided for every order.

Typical Application Scenarios

• Turbine speed monitoring systems.
• Emergency shutdown (ESD) logic interfaces.
• Burner management systems (BMS).
• High-speed digital input acquisition for rotating machinery.
• Process automation in oil & gas, power generation.

Diagnostic Capabilities

• Detects open circuit in field loops.
• Identifies short circuit conditions per channel.
• Monitors field power supply integrity via LED.
• Line monitoring thresholds help pinpoint device faults.
• Fuse status check without module removal.

Frequently Asked Questions (FAQ)

• What is the maximum current per channel?3A at 120Vac or 2A at 30Vdc.
• Can I use this FTA with other input modules?No. It is designed only for T8403 Trusted module.
• How do I know if field power is present?The green LED on the board lights up.
• What wire size fits the screw terminals?30 to 12 AWG (0.05 to 2.5 mm²).
• Is the FTA hot-swappable?Yes, SmartSlot supports one-to-many hot replacement.
• What happens if a channel fuse blows?That channel stops working. Replace the fuse after fixing the field fault.
• Does this assembly require external power?It takes 24 Vdc from T8442 supply.

Advanced FAQ – Experience-based & Selection Guide

• Why does my field loop show open circuit alarm?Check wiring continuity and fuse. Also verify field device is powered.
• Can I mix 120Vac and 30Vdc channels on same FTA?No. Each channel rating is fixed per module design. Use separate FTAs for different voltages.
• How to improve noise immunity in long cable runs?Use shielded twisted pair cables. Keep field wiring away from high-power lines.
• What is the typical lifespan of this FTA?Over 10 years in normal industrial conditions, with regular maintenance.
• Selection guide: Choose T8891 for speed output + digital input integration. If you need only digital inputs without speed functions, consider T8800. For higher current outputs, select other Trusted FTAs. Always match with T8403 module.
• Is there a compatible spare part kit?Yes. RA part #3AX185 is the reference. Order fuses separately from ICS Triplex.
• How to test channel diagnostics without field device?Use a resistor to simulate sensor. Measure voltage across terminals.

Ordering & Purchasing Guidance

• Always confirm model T8891 and series Trusted TMR.
• Check that your system uses T8442 for supply.
• Verify channel count (40 channels) matches application.
• Consider spares: order extra FTAs for critical processes.
• Contact us for bulk discounts and fast shipping options.
• For urgent needs, choose FedEx Priority or DHL Express.

Contact & Support

For inquiries or technical support: +86 158 8020 0923 (WhatsApp)

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