Description
T8449 Trusted TMR Valve Monitor Module
Monitor and control safety valves with high reliability. This triple-module redundant (TMR) unit drives safety valves and checks their position using the next channel as an input.
Key Features
- ✓ Triplicated design for safety-critical applications
- ✓ Works with 20-32 Vdc power (27 W max)
- ✓ Monitors valve position via next channel input
- ✓ Accepts 4-20 mA loop from analog position sensor
- ✓ Also accepts resistor network from limit switches
- ✓ Certified for Ordinary, HazLoc, ATEX, IECEx
Technical Data
- ▪ Model: T8449
- ▪ Series: Trusted TMR
- ▪ Type: Valve Monitor Module
- ▪ Power supply: 20 – 32 Vdc
- ▪ Power consumption: 27 W
- ▪ Architecture: Triple modular redundancy (TMR)
- ▪ Certifications: Ordinary location, HazLoc, ATEX, IECEx
- ▪ Input types supported:
- 4-20 mA current loop (analog position sensor)
- Voltage input via resistor network (limit switches)
Installation & Wiring Notes
- Each output needs a config to drive the safety valve.
- Valve position is monitored by the next channel (set as input).
- For analog sensor: wire as 4-20 mA current loop.
- For limit switches: arrange them in a resistor network.
- Resistor network must be powered from 24 Vdc.
- Voltage steps must move one direction through full valve travel.
- If steps reverse, the module cannot find valve position.
Wiring Diagrams Reference
- Figure 4: Resistor network with limit switches (voltage input).
- Figure 6: Analog position sensor (4-20 mA current loop).
Diagnostics & Maintenance
- TMR design allows one fault without losing function.
- Module reports valve position errors in real time.
- Use Trusted engineering software for health checks.
- Inspect wiring if voltage steps are non-monotonic.
Compatibility
- Fits all Trusted TMR Controller Chassis.
- Works with 4-20 mA position transmitters.
- Works with dry contact limit switches plus resistors.
Package Includes
- T8449 Trusted TMR Valve Monitor Module
- Mounting hardware
- Documentation pack (includes wiring diagrams)
- Certificate of conformance (ATEX/IECEx)
Warranty & Delivery
- 12-month warranty covers manufacturing defects.
- Express shipping via FedEx, UPS, or DHL.
- Tracking number provided for all orders.
Typical Applications
- Emergency shutdown (ESD) valve monitoring
- Process safety systems in oil & gas
- Chemical plant isolation valves
- Power generation turbine valves
- High-integrity pressure protection systems (HIPPS)
Frequently Asked Questions (FAQ)
- Q1: What happens if the resistor network steps reverse direction?
A: The valve monitor module cannot determine valve position. Always keep steps moving one way through full travel. - Q2: Can I use both 4-20 mA and limit switches on same module?
A: Yes, but each input channel must use only one type. Mix channels as needed. - Q3: Is T8449 hot-swappable?
A: No. Power down the chassis before installing or removing this module. - Q4: Does the 12-month warranty cover shipping damage?
A: It covers defects only. For shipping damage, file a claim with FedEx, UPS or DHL immediately. - Q5: How do I choose between analog sensor and limit switches?
A: Use analog (4-20 mA) for continuous position feedback. Use limit switches for end-stop detection only.
Buyer Guidance & Experience Tips
- Order spare T8449 for critical safety systems to reduce downtime.
- Test resistor network steps with a meter before connecting to module.
- Use DHL for fast international delivery. Use FedEx for Americas regions.
- Keep wiring diagrams (Figure 4 and Figure 6) near the chassis.
- For hazardous areas, verify ATEX/IECEx cert matches your zone.
- Label each channel’s sensor type to help future troubleshooting.
Questions or orders: +86 158 8020 0923 (WhatsApp)
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