TRICONEX 2351 | Trident Analog I/O Baseplate

Unboxing & Physical Snapshot

• Manufacturer: TRICONEX / Invensys
• Model: 2351
• Product type: Analog Input Baseplate Kit
• Primary application: Trident analog-input subsystem for 4–20 mA applications.
• Associated AI module: Model 3351 Analog Input Module.
• OEM kit components: I/O Baseplate 3000675-010, I/O Interconnect Assembly 2921, Slot Cover 2900, and Terminal Cover 2901.
• Physical dimensions: Exact OEM dimensions should be taken from the applicable Trident mechanical drawing; third-party module dimensions should not be substituted for the baseplate assembly.
• Estimated shipping weight: Approximately 2.25 kg has been published by one supplier for a 2351 listing, but this is not an OEM-certified weight and should be replaced with the measured packed weight for freight documents.
• What’s in the box: 2351 baseplate kit components listed above; AI module 3351 is not automatically included unless explicitly stated on the purchase order.
• Receiving inspection: Check the baseplate, terminal positions, interconnect assembly, slot cover, terminal cover, mounting hardware, and identification labels.

Product Introduction

The TRICONEX 2351 is a physical I/O baseplate used to interface a Trident 3351 analog-input module with field wiring. It is therefore part of the signal-conditioning and termination architecture rather than the active processor electronics. The OEM Trident Planning and Installation Guide explicitly identifies 2351 as an Analog Input Baseplate, while 3351 is the corresponding 32-point, commoned, 4–20 mA analog-input module.

This distinction matters during warehouse receiving. Do not catalog 2351 as an analog-input electronics module. The baseplate provides the physical field interface and electrical termination path for the AI module (the field connections include redundant +24 V supplies, 24 V return, shield, safety connections, and individual signal connections).

Core Technical Specifications

TRICONEX 2351

The OEM documentation specifies 130 mA typical and 200 mA maximum fault current for the 2351 baseplate under the specified field short-to-ground condition.

Do not confuse these baseplate figures with the electrical specifications of the 3351 AI module. The 3351 provides the active signal conversion, including 4–20 mA input processing, while the 2351 provides the physical field termination/baseplate interface.

? Global Compliance & Industry Certifications

The 2351 should be evaluated as part of the complete Trident I/O installation, rather than assigning independent safety claims based solely on the baseplate.

• CE Mark: Verify the applicable Triconex/Invensys conformity documentation for the exact baseplate kit and system configuration.
• UL/cUL: Confirm the certification applicable to the complete Trident hardware arrangement.
• ATEX/IECEx: Do not assume hazardous-area approval from the 2351 part number. Hazardous-location applications require verification of the complete approved hardware and field termination arrangement.
• Marine approvals: DNV or equivalent marine approval must be confirmed for the exact system configuration.
• Functional safety: The 2351 is an I/O infrastructure component; its presence does not independently establish a SIL rating for an installed safety function.
• EMC: Cable shielding, grounding, field wiring, cabinet construction, and associated Trident modules all affect the final installation’s EMC performance.

The 2351’s 500 VDC minimum functional-to-protective-earth isolation is an important installation characteristic, but it should not be interpreted as an explosion-proof or hazardous-area certification.

Verify specific lot certifications with OEM.

? Long-Term Storage & Asset Preservation Guide

Keep the 2351 dry and mechanically protected. Unlike a CPU, the baseplate’s primary long-term risks are connector oxidation, contamination, warped mounting surfaces, and damage to terminal hardware.

Maintain humidity below 60% RH where practical. Store the baseplate in its original packaging or a clean protective bag, away from sulfur compounds, salt spray, solvents, and other corrosive atmospheres.

Protect the terminal and backplane interfaces. Do not stack heavy equipment on top of the baseplate, and keep the retaining hardware with the assembly. Missing screws, covers, or interconnect hardware can turn a nominally complete spare into an incomplete installation kit.

Before release from inventory, inspect the terminal connections, interconnect assembly, mounting holes, insulating surfaces, and identification markings. The associated 3351 AI module should be stored and tracked separately unless the purchased item is specifically a complete 5351 assembly.

TRICONEX 2351

Physical Installation Prerequisites

• Install the 2351 only within the specified Trident I/O architecture.
• Verify that the baseplate is the correct 3000675-010 configuration where applicable.
• Confirm compatibility with the 3351 analog-input module.
• Install the specified 2921 I/O Interconnect Assembly.
• Verify the slot cover and terminal cover are correctly installed where required.
• Connect field wiring according to the approved Trident termination drawing.
• Verify both field-power connections before commissioning.
• Maintain the specified protective-earth and shield connections.
• Route analog signal wiring separately from high-energy switching, VFD, and motor wiring.
• Avoid sharp bends or mechanical stress at terminal connections.
• Maintain sufficient cabinet airflow around adjacent Trident electronics.
• As a preliminary cabinet practice, preserve approximately 50 mm around ventilation paths, unless the applicable OEM mechanical drawing specifies a different clearance.
• Verify field short-circuit protection and grounding before energizing transmitters.
• Perform point-to-point verification for all 32 channels before placing the associated safety function into service.

Buyer’s FAQ

Which HS tariff code should be used for TRICONEX 2351?

Do not classify the 2351 as a generic analog-input electronic module. The OEM documentation identifies it as an Analog Input Baseplate, so the final HS classification should reflect the actual physical function and construction. Have the customs broker validate the destination-country tariff code before export.

What about Country of Origin?

Use the actual COO supported by the physical assembly and traceability documents. Do not infer COO from the supplier’s shipping location or from the country associated with the Triconex brand.

Should the baseplate be insured during shipment?

Yes, when it is a critical or obsolete spare. Protect the terminal hardware and interconnect assembly against impact and bending; use a rigid carton with ESD/moisture protection where electronic components are included.

Does the 2351 include the latest firmware?

No firmware should be expected in the 2351 baseplate itself. It is passive I/O infrastructure. Firmware and active signal-processing functions belong to the associated electronic module, such as the 3351 Analog Input Module.

Asset-control recommendation

Create the ERP/CMMS record as:

TRICONEX 2351 — ANALOG INPUT BASEPLATE KIT

Keep 2351 and 3351 as separate stock identities unless purchasing a documented complete assembly. The OEM documentation supports this distinction clearly: 2351 = baseplate; 3351 = analog-input module.