Invensys 7400221-100
Invensys 7400221-100
Invensys 7400221-100
Invensys 7400221-100
Invensys 7400221-100
Invensys 7400221-100
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7400221-100

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The 7400221-100 Pulse Input Baseplate provides secure mounting and reliable pulse signal connections.
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Technical specifications for 7400221-100

  • Manufacturer:
    Invensys
  • Part Number:
    7400221-100
  • Product Family:
    Triconex
  • Product Type:
    Pulse Input Baseplate
  • Stock:
    2
  • Points:
    6, channel-isolated, commoned ground
  • Input type:
    Differential
  • Sensor compatibility:
    Magnetic, active, open collector
  • Maximum operating voltage:
    ±33 VDC
  • Speed range:
    0 to 32,000 RPM
  • Input frequency range:
    0.5 Hz to 32 kHz
  • Weight:
    1.5 kg
  • Estimated shipping dimensions:
    27x17.8x8.5cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Applications Manuals Specifications Applications Performance & Efficiency Safety & Compliance

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.
Description
The 7400221-100 Pulse Input Baseplate is a Triconex pulse input baseplate , and is typically used in safety instrumented systems.

This baseplate provides 6 points, each channel isolated with a commoned ground, and supports differential input. It is compatible with a variety of sensors, including magnetic, active, and open collector types.

Overall, the 7400221-100 is a high-performance pulse input baseplate for Triconex systems, designed for safety-critical applications where reliability and accuracy are essential.

With built-in support for comprehensive online diagnostics, the Invensys Triconex 7400221-100 allows maintenance teams to monitor signal integrity and channel health without process interruption. This level of diagnostic granularity, combined with TMR fault tolerance, significantly reduces false trips and unplanned downtime, directly improving plant availability and operational efficiency. It remains the trusted choice for brownfield expansions and legacy system replacements requiring certified safety integrity.
Alternative Names
7400221 100 7400221100 7400221-1OO PI2381 7400210-010 7400121-380 7400207-001
Technical notes
The Invensys Triconex 7400221-100 requires a compatible Tricon main chassis (e.g., 3008, 3009) and must be paired with the PI2381 pulse input module. For SIL 3 applications, always verify the baseplate address jumpers (32A/32C as seen on physical label) match the system configuration to ensure proper channel mapping and fault annunciation.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What is the exact firmware and software compatibility requirement for the Invensys Triconex 7400221-100?
The Invensys Triconex 7400221-100 is a passive backplane and has no firmware itself. It is fully compatible with the PI2381 pulse input module running under Tricon MP firmware v9.0 or higher. The host system (Tricon v9 or Trident) must be configured using TriStation 1131 v4.x or later.
Can the Invensys Triconex 7400221-100 accept NAMUR sensors or 2-wive loop-powered devices?
No. The Invensys Triconex 7400221-100 does not provide loop power for 2-wire sensors. It is designed for dry contact, open-collector, or voltage-output sensors (5-125V DC). For NAMUR sensors, you must use an external isolator/converter before connecting to this baseplate.
How deep are the diagnostic capabilities on each channel of the Invensys Triconex 7400221-100?
The Invensys Triconex 7400221-100 enables per-channel open-circuit detection, short-to-ground detection, and signal out-of-range monitoring. These diagnostics are reported to the Tricon main processor and can be viewed in real-time via TriStation or a DCS through Modbus TCP gateway, with a typical detection delay of <10ms.
What third-party systems can the Invensys Triconex 7400221-100 integrate with?
The Invensys Triconex 7400221-100 integrates through the Tricon backplane. It can share pulse data (RPM, flow rate) with any DCS or PLC via Modbus TCP, Modbus RTU, or OPC DA/AE servers using the Tricon communication modules (e.g., 4351B, 4352B). Direct analog or serial output is not available from this baseplate itself.
What are the specific environmental limits for installing the Invensys Triconex 7400221-100?
The Invensys Triconex 7400221-100 must be installed in a non-condensing environment (5-95% humidity) with an operating temperature range of -40°C to +70°C. It is not rated for washdown areas or direct chemical exposure. Use a NEMA 4X / IP66 enclosure when installing near coastal or dust-heavy environments.

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