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SKU:T8449
ICS Triplex T8449 TMR Valve Position Monitor 24V
Manufacturer: ICS Triplex
Product No.: T8449
Product Type: Position Monitor
Product Origin: USA
Payment:T/T, Western Union
Weight: 1130g
Shipping port: Xiamen
Warranty: 12 months
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Tavsif
Product Overview
The ICS Triplex T8449 is a TMR valve monitor module for safety-critical actuation. It provides a triplicated 24 Vdc output to drive the valve and monitors position via the next input channel—either 4–20 mA from a sensor or a resistor network from limit switches. Built for SIL 3 applications.
Core Advantages
TMR Architecture
Fully triplicated with 2-out-of-3 voting. No single failure compromises valve action.
Flexible Feedback Input
Accepts 4–20 mA loops or voltage-divider networks. The resistor network must produce monotonic voltage steps across full valve travel—otherwise the module cannot determine position.
Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 20–32 Vdc (nom. 24 Vdc) |
| Power | 27 W max |
| Analogue Input | 4–20 mA |
| Switch Network Input | 0–24 Vdc stepped |
| Temp. Range | -40 °C to +70 °C |
| Certifications | ATEX, IECEx, HazLoc |
| SIL | SIL 3 (IEC 61508) |
Installation Tips
Analogue Sensor
Set zero/span for 4 mA (closed) and 20 mA (open). Ensure loop power is 24 Vdc.
Resistor Network
Use precision resistors (≤1%). Voltage steps must be monotonic across entire stroke—otherwise the module will flag a position error.
Hazardous Area
Follow ATEX/IECEx rules: use certified glands, separate IS from non-IS circuits, and observe max surface temperature.
Why Choose T8449?
Withstands vibration, temperature swings, and corrosion. TMR eliminates common-cause failures. Seamlessly integrates with ICS Triplex Trusted systems and third-party TSI platforms. Reduces external components while improving diagnostic coverage.
FAQs
Q1: How to check valve position via voltage?
A1: Measure voltage at the input. It should step up or down monotonically as switches actuate. Reversing steps means wiring error—module will reject it.
Q2: Can it replace an old single-channel monitor?
A2: Yes, but rewire for TMR: connect both output (drive) and input (feedback). The old monitor usually lacks feedback input—add the resistor network or transmitter.
Q3: What does HazLoc mean?
A3: Approved for Class I, Div. 2 / Zone 2. Global compliance for explosive atmospheres. Check certificate for gas group and T-class (e.g., II 3 G Ex nA IIC T4).
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