Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | TMR Pulse Input Module |
| Number of Channels | 6 galvanically isolated input points |
| Frequency Range | 0.5 Hz to 32 kHz |
| Speed Range | 0 to 32,000 RPM |
| Measurement Accuracy | ±0.1% (0.5–2000 Hz); ±0.01% (2000–32000 Hz) |
| Scan Update Rate | Minimum 20 ms |
| Redundancy Architecture | Triple Modular Redundant (TMR), 2oo3 voting |
| Isolation Rating | 500 VDC functional-to-protective earth; 800 VDC logic isolation |
| Input Sensor Type | Magnetic pickup, incremental pulse sensors |
| Safety Certification | IEC 61508 SIL3, IEC 61511 |
| Operating Temperature | 0°C to +60°C |
| Baseplate | Requires 2381 pulse input baseplate |
| Diagnostic | Built-in precision reference test, open/short circuit detection |
Product Introduction
TRICONEX PI3381 is a TMR pulse input module built for Tricon safety instrumented systems. It accepts pulse signals from magnetic speed pickups and converts pulses to RPM and frequency data for rotating machinery protection.
Each of the six channels uses triplicated signal paths. The Tricon controller performs 2oo3 voting on readings, so a fault in one channel will not produce false speed values or trigger spurious trips.
TRICONEX PI3381
TRICONEX PI3381
TRICONEX PI3381
TRICONEX PI3381
Application Scenarios & Field Experience
Part 1 (Narrative Paragraph)
High-speed turbines and centrifugal compressors depend on reliable overspeed protection. Standard single-channel pulse cards can fail silently, leaving machinery unprotected. The PI3381’s triple redundant signal path continuously validates pulse readings and flags sensor degradation before a dangerous overspeed event.
Part 2 (Numbered List)
- Power generation: Gas and steam turbine overspeed protection for generator safety trips
- Oil & gas: Centrifugal compressor speed monitoring at pipeline compressor stations
- Refining: Reactor recycle compressor safety interlock and RPM limiting
- LNG facilities: High-speed cryogenic pump speed monitoring and trip logic
Part 3 (Short Field Story)
A refinery’s steam turbine SIS system had intermittent noisy pulse signals from a magnetic pickup. Their older pulse module could not distinguish between real speed variation and electrical noise. After installing PI3381, the TMR voting rejected corrupted samples. The system maintained valid speed readings and avoided an unplanned turbine trip, while diagnostics alerted technicians to the failing pickup for scheduled replacement.
Standard Operating Procedure (SOP) for Quality Control
- Visual & Origin Inspection: Check Triconex OEM labeling, serial number, PCB condition, connector pins and factory seals for new original inventory.
- Live Rig Testing: Mount module on matching 2381 baseplate, apply simulated pulse signals across all six channels. Validate TMR voting, RPM conversion and fault diagnostics.
- Firmware Verification: Read and record module hardware/firmware revision; confirm channel count and frequency range match OEM datasheet.
- ESD-Safe Packaging: Protect edge connector, place unit inside anti-static bag, seal and pack in rigid shock-resistant carton for transit.
Frequently Asked Questions (FAQ)
Q1: Can PI3381 drop into older Tricon chassis without baseplate replacement? A: It requires the matching 2381 pulse input baseplate. Existing baseplates from non-TMR pulse modules are not compatible. Confirm baseplate part number before ordering.
Q2: What warranty do you provide for this unit? A: We offer a 12-month warranty. Warranty covers hardware defects under rated operating conditions. Overvoltage, reverse field wiring, or ESD damage void coverage.
Q3: What is the current stock and shipping timeline? A: We hold limited new surplus inventory. Units ship within 3 business days after order confirmation. Larger project quantities require lead time; confirm stock before locking project schedules.
Q4: Can I adjust gear-tooth count and RPM scaling in the module locally? A: Configuration is set via TriStation engineering software. Always back up SIS application logic before modifying scaling parameters. Wrong tooth count settings produce incorrect speed readings and false trips.
Q5: Can I remove or insert this module while the Tricon SIS rack stays powered? A: The module supports hot-swap in a properly configured Tricon rack. Even so, isolate field pulse wiring before removal to prevent signal spikes that may trigger SIS alarms.
