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SKU: FTA-T-21

Honeywell FTA-T-21 Fail-Safe Digital Input FTA

The Honeywell FTA-T-21 is a 16-channel Fail-Safe Digital Input Field Termination Assembly for FSC systems. It provides high-integrity signal processing for safety-critical applications with support for 125VAC and 150VDC inputs.

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Technical Specifications

FeatureDetails
BrandHoneywell
Model NumberFTA-T-21
Module TypeFail-Safe Digital Input Field Termination Assembly
System SeriesFail Safe Control (FSC) System
Input Capacity16 Channels
Maximum Voltage125VAC / 150VDC
Operating Temperature-40°C to +85°C
Protection RatingIP20
Weight0.12 kg

System Purpose and Performance

The Honeywell FTA-T-21 serves as a critical interface within the Fail Safe Control (FSC) architecture. This Field Termination Assembly (FTA) manages discrete signals for high-integrity safety applications. It bridges field sensors and the central logic controller to ensure emergency shutdown capabilities. Furthermore, the unit prioritizes system uptime by providing a stable signal path for industrial monitoring.

Key Engineering Features

This module supports 16 independent digital input channels for high-density wiring. Its design handles diverse voltage requirements up to 125VAC or 150VDC. Consequently, the FTA-T-21 accommodates various sensor types and power configurations. The hardware maintains operational accuracy across a wide temperature spectrum from -40°C to +85°C.

The unit utilizes a compact panel-mounted footprint to optimize control cabinet space. High-grade terminal connectors prevent signal loss during high-vibration conditions. Additionally, the IP20-rated enclosure protects internal circuitry from particulate contamination and moisture. This robust construction significantly reduces the need for frequent hardware maintenance.

Operational Integration

The FTA-T-21 integrates seamlessly with existing Honeywell SMS technology and DCS frameworks. This compatibility streamlines the installation process for both new builds and safety upgrades. Operators benefit from reduced commissioning time due to the straightforward plug-and-play header design. By utilizing this assembly, industrial plants enhance their overall safety integrity level (SIL) for critical processes.

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Hardware Specifications

ParameterSpecification
ModelFTA-T-20
BrandHoneywell
OriginUSA
Weight0.34 kg
Dimensions19 x 7 x 5.7 cm
Operating Temp0 to 60 deg C
Power ConsumptionStandard Backplane Power
Module TypeFTA Output Module
SystemFSC System / DCS
Operating Voltage220 VAC
Output Frequency30 kHz
HS Code8537101190

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Frequently Asked Questions

Q: What is the main physical purpose of the FTA-T-20 assembly?A: The board functions as a Field Termination Assembly (FTA) to interface logic controller output channels directly with field wiring field devices.Q: How does channel-to-channel isolation benefit the field wiring connections?A: Channel-to-channel isolation prevents electrical cross-talk, common-mode noise, and transient voltage spikes from propagating between individual output loops or back into the main system rack.

Field Installation Guidelines

  1. Mount the module onto the dedicated DIN rail or cabinet termination rack using the integral retaining latches.
  2. Verify that field supply power is de-energized before connecting high-voltage wiring to the terminal blocks.
  3. Strip field wires to the specified length and torque terminal screws according to standard cabinet wiring practices.
  4. Ensure signal cable shielding is grounded at a single common earth ground point to minimize electro-magnetic interference.
  5. Check line continuity and load impedance before applying the 220 VAC system operating power.
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