Triconex 338S2
Triconex 338S2 - Image 2

Triconex 338S2

Product Introduction: The Triconex 338S2 is a triple-redundant digital output module belonging to the Trident family. It converts digital commands from the Trident processors into safety-critical outputs to drive field devices such as solenoid valves, relays, and actuators. The module includes per-channel diagnostics and supports supervised output configurations, ensuring high safety and availability.

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Category: SKU: Triconex 338S2

Description

Triconex 338S2

Technical Specifications:

  • Type: Triple-redundant digital output module (supervised outputs)
  • Output Channels: 32 points (common reference)
  • Nominal Voltage: 24 VDC
  • Current Rating: Up to 1.7 A per point (typical); surge ratings per datasheet
  • Diagnostic Coverage: Continuous per-point diagnostics; output voter diagnostics (OVD)
  • Isolation: Point-to-point isolation; 1,500 VDC isolation typical
  • Operating Temperature: 40 °C to +70 °C
  • Mounting: Trident chassis with hot-swap support

Functional Features:

  • Triple-redundant output circuits with patented quadruple voter
  • Output Voter Diagnostics (OVD) to detect stuck-on/off faults
  • Automatic fault detection and reporting; per-point status LEDs
  • Supports supervised and non-supervised output modes

Application Scenarios:

  • Final element actuation in ESD systems (solenoid valves, shutdown devices)
  • Fire and gas system outputs (annunciators, suppression actuators)
  • Safety interlock outputs in process plants

Performance Parameters:

  • Fast response times (typically <10 ms) for safety actions
  • High diagnostic coverage (>99%) for output faults

Material and Structural Characteristics:

  • Rugged PCB with power switch components; conformal coating options
  • Trident front panel with keyed connector and status indicators

Working Principle: Each output is driven by three independent circuits; a quadruple voter ensures correct operation unless two paths fail. Diagnostics periodically pulse outputs to detect failures (OVD). Faults are reported and the module maintains safety on failure. Installation Requirements:

  • Install into Trident chassis slot; verify correct keying
  • Connect field wiring to appropriate field termination panels/FTAs
  • Configure output modes (supervised/non-supervised) via TriStation
  • Verify output response during commissioning

Usage Notes:

  • Do not exceed per-point current ratings; use external interposing relays if necessary for high loads
  • Regularly review diagnostic alarms; perform periodic output testing
  • Maintain proper grounding and shielding for output circuits

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