IS230STCIH6A
IS230STCIH6A
IS230STCIH6A
IS230STCIH6A
IS230STCIH6A

GE IS230TNDTH2A | Mark VIe TMR Discrete I/O Terminal Board – Field Service Notes

  • Model: IS230TNDTH2A
  • Series: GE Speedtronic Mark VIe / VIeS
  • Type: TMR (Triple Modular Redundant) Discrete I/O Terminal Board
  • Pair With: IS220PDIOH1B (TMR Digital I/O Pack)
  • Key Feature: 72× isolated discrete inputs, 36× Form-C relay outputs (3-of-3 voting)
  • Use: Safety-critical turbine digital I/O (E-stop, overspeed, burner management)
Get a Quote
In Stock
Manufacturer:
Part number: IS230TNDTH2A
Our extensive catalogue, including : IS230TNDTH2A , is available now for dispatch to the worldwide. Brand:
The listed price is not final; the actual selling price is negotiable based on current market conditions.

Description

Hard-Numbers: Technical Specifications

  • Input Channels: 72× TMR discrete contact inputs (24 groups × 3)
  • Input Wetting: 18–32 VDC (24/48/125 VDC configurable)
  • Output Channels: 36× Form-C TMR relay outputs (12 groups × 3)
  • Relay Rating: 5A @ 250VAC / 30VDC; 125VDC trip solenoid rated
  • Isolation: 2500VAC field-to-backplane; channel-to-channel isolated
  • Power Input: 24 VDC (18.5–32 VDC), 25 W max
  • Response Time: Input ≤10ms, Output ≤5ms
  • Voting Logic: 2-out-of-3 (2oo3) for safety functions
  • Temp: -40°C to +70°C; Humidity 5–95% (non-condensing)
  • Mount: 35mm DIN-rail
  • Dimensions: 267 × 150 × 64 mm; Weight: 2.0 kg
  • Cert: UL, CE, Class I Div 2, ATEX Zone 2, SIL 3 capable
  • Protection: Surge suppression, over-voltage, reverse polarity
IS230STCIH6A

IS230STCIH6A

The Real-World Problem It Solves

Safety systems (E-stop, burner management, overspeed) demand zero-fault tolerance. Single-channel I/O risks single-point failure. delivers TMR isolation, 2oo3 voting, and surge protection to eliminate common-mode failures.

Typical Safety Applications:

  • Gas turbine emergency stop (E-stop)
  • Burner management and flame detection
  • Overspeed and vibration trip circuits
  • Compressor anti-surge protection
  • Safety interlock & permissive circuits

Bottom line: is the TMR I/O backbone for Mark VIe safety-critical turbine control.

 

Hardware Architecture & Under-the-Hood Logic

is a TMR passive-active interface:

  1. Field signals split into 3 isolated channels (A/B/C) to 72 input terminals.
  2. Inputs: EMI filtering + surge suppression + 2500VAC isolation.
  3. Outputs: 36× Form-C relays (3 per channel) for 2oo3 voting.
  4. Backplane connects to IS220PDIOH1B TMR I/O pack for voting logic.
  5. Front-panel LEDs: Power, Input On, Relay Energized, Fault.
  6. Thermal protection triggers at >70°C; per-channel fusing.
IS230STCIH6A

IS230STCIH6A

Field Service Pitfalls: What Rookies Get Wrong

TMR Wiring Phase MisalignmentCrossing A/B/C phases breaks 2oo3 voting; causes nuisance trips.

  • Field Rule: Label A/B/C at sensor and ; verify continuity.

Under-sized Safety WiringUsing <18 AWG for 5A safety outputs causes voltage drop.

  • Field Rule: Use 18 AWG stranded for safety relays; max 3m length.

Missing Inductive Spike ProtectionSolenoids/valves destroy relay contacts without suppression.

  • Quick Fix: Install 1N4007 diodes or RC snubbers on all DC outputs.

Common Ground LoopsMixing TMR grounds creates measurement error and fault masking.

  • Field Rule: Terminate shields ; float remote ends.

 

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.

Related products