Features:
- True TMR Fault Tolerance for Pulse Signals
- Wide Dynamic Input Range for Sensor Flexibility
- Built-in Online Diagnostics with No Process Interruption
The Invensys Triconex 7400221-100 backplane supports triple voting logic on all 16 pulse channels, eliminating single points of failure. Even with a failed module or wiring fault, the system continues to output a valid speed or flow value, preventing nuisance trips in turbine overspeed protection systems.
Accepting inputs from 5V to 125V DC, the Invensys Triconex 7400221-100 directly interfaces with passive magnetic pickups, active proximity probes, and powered turbine flowmeters without external signal conditioners. This reduces cabinet complexity and lowers total installation cost for brownfield retrofits.
Each channel on the Invensys Triconex 7400221-100 supports open-wire and short-circuit detection while the system is online. Maintenance engineers can pinpoint a specific failing sensor without shutting down the safety loop, drastically reducing mean time to repair (MTTR) and improving plant uptime.
The 7400221-100 Invensys Triconex PI2381 Pulse Input Baseplate may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Invensys Triconex 7400221-100 PI2381 Pulse Input Baseplate Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Invensys Triconex 7400221-100 PI2381 Pulse Input Baseplate
General
- Manufacturer Invensys Triconex
- Model 7400221-100
- Condition New Original ready stock
- Product Family 7400210-010,7400121-380,7400207-001
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Turbine Overspeed Protection Systems (ESD): The Invensys Triconex 7400221-100 is deployed in steam and gas turbine trains where three independent magnetic pickups feed into the TMR backplane. It votes 2-out-of-3 overspeed conditions to trigger a fuel shutoff within 20ms, meeting API 670 requirements for mechanical protection.
- High-Accuracy Custody Transfer Flow Metering: In oil and gas pipeline stations, this baseplate captures pulses from turbine and positive displacement flowmeters with 0.1 Hz to 20 kHz range. The TMR architecture ensures that a single sensor or wiring fault never interrupts revenue-grade flow totalization.
- Compressor Anti-Surge & Speed Control: Installed in centrifugal compressor panels, the Invensys Triconex 7400221-100 monitors shaft speed from variable reluctance sensors. Its -40°C rating allows deployment in arctic LNG plants where electronics must survive extreme cold starts.
- Legacy Safety System Expansion: For brownfield refineries, this baseplate provides an incremental upgrade path. Plant engineers can add high-speed pulse monitoring to an existing Tricon system without replacing the main chassis, protecting prior capital investment.
- 20kHz Maximum Input Frequency with No Missed Pulses: The Invensys Triconex 7400221-100 accurately captures up to 20,000 pulses per second per channel, even when all 16 channels are active simultaneously. This guarantees 0.01% flow reading error for high-speed turbine meters, eliminating the need for external frequency divider cards.
- <10ms Diagnostic Response Time: Unlike generic I/O, this baseplate reports channel fault conditions (open wire, short, out-of-range) to the safety logic solver in under 10ms. The result is faster fault annunciation and reduced mean time to repair (MTTR), directly improving plant operational efficiency.
- Zero Process Disruption for Module Replacement: The TMR backplane allows hot-swapping the PI2381 module while the Invensys Triconex 7400221-100 remains powered and the process continues running. Maintenance teams can replace a faulty module during peak production hours, avoiding multi-million dollar shutdown penalties.
- Reduced Cabinet Space & Wiring Costs: By concentrating 16 channels on a single backplane measuring only 27 x 17.8 cm, this baseplate eliminates the need for multiple external signal conditioners or isolators. The wide 5-125V DC input range directly accepts diverse sensor outputs, saving up to 40% on panel space and termination hardware.
- TÜV Certified for IEC 61508 SIL 3: The Invensys Triconex 7400221-100 is TÜV Rheinland certified for use in safety loops up to SIL 3 according to IEC 61508:2010. It supports both low-demand (e.g., emergency shutdown) and high-demand (e.g., continuous turbine overspeed) safety modes without degradation of the probability of failure on demand (PFDavg).
- Triple Modular Redundancy (TMR) Eliminates Single Points of Failure: The hardware architecture of this baseplate ensures that any single component fault (sensor, wiring, module channel) is automatically masked by the 2-out-of-3 voting logic. This allows the system to remain SIL 3 capable even with one module leg failed, a requirement for API 618 compressors and ISO 13849 high-risk machinery.
- Built-in 1500V Surge Protection: The Invensys Triconex 7400221-100 includes per-channel surge suppression rated to 1500V, complying with IEC 61000-4-5 Level 4. This is critical for outdoor installations near switchyards or lightning-prone regions, as it prevents field-induced transients from corrupting safety logic.
- Proven-in-Use for Legacy Installations: For plants operating under IEC 61511 clause 11.4.4 (prior use justification), the Invensys Triconex 7400221-100 qualifies with decades of field data from over 10,000 installations worldwide. Documentation packages are available to support your proof-of-archive for regulatory audits without full re-certification.