AI3351 TRICONEX Analog Input Module

Triconex AI3351 Tricon SIS Analog Input Module

Triconex AI3351 Tricon SIS Analog Input Module

Availability: 10 left in stock

TRICONEX AI3351 Analog Input Module The TRICONEX AI3351, also cataloged as the TRICONEX 3351 Analog Input Module, operates as a...

SKU: AI3351

Manufacturer: Triconex
Product No.: AI3351
Product Type: Analog Input Modules
Product Origin: USA
Payment:T/T, Western Union
Weight: 1500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

TRICONEX AI3351 Analog Input Module

The TRICONEX AI3351, also cataloged as the TRICONEX 3351 Analog Input Module, operates as a dedicated hardware component for converting field analog signals into digital values within Tricon SIS platforms. This hardware element samples analog currents from field transmitters and provides digital representations to the main processing units. The module manages input signal filtering and digitizes the electrical values via independent internal conversion circuits.

Hardware Specifications

Parameter	Specification
Model	AI3351
Brand	TRICONEX (Schneider Electric)
Origin	USA
Weight	1.5 kg (4.10 lbs)
Dimensions	177.8 mm x 101.6 mm x 228.6 mm
Operating Temp	-20 deg C to +60 deg C
Power Consumption	24 VDC nominal loop power
Channels	32 isolated analog input channels
Signal Range	4-20 mA (standard), 0-10 VDC (optional)
Resolution	12 bits
Accuracy	+/-0.1% of full scale
Input Isolation	2500 V RMS channel-to-channel and channel-to-backplane
Frequency Response	16 Hz
Safety Certification	IEC 61508 SIL3, TÜV, CE, UL Class I Div 2

Triple Modular Redundancy & Galvanic Isolation

The hardware incorporates a Triple Modular Redundancy (TMR) 2oo3 architecture to execute fail-safe state execution at the input processing level. The 32 isolated analog input channels split the incoming 4-20 mA current signals into three independent legs. Each leg routes through a dedicated analog-to-digital converter (ADC) and microprocessor circuit. The field data undergoes continuous software and hardware voting before logic execution. Galvanic isolation rated at 2500 V RMS prevents electrical surges or channel-to-channel cross-talk from corrupting the separate leg processing paths. If an individual channel experiences a hardware failure, the remaining legs sustain uninterrupted voted processing while triggering internal diagnostics.

Frequently Asked Questions

Q: How does the module execute a hot-swap sequence without corrupting live input data loops?

A: The slot architecture supports complete online hot-swapping. When you insert a replacement module into the adjacent slot on a dual baseplate, the TriBus backplane synchronization routine automatically transfers channel baseline profiles, enabling active processing without taking the safety loops offline.

Q: What are the diagnostic behaviors of the module when an open loop or wiring fault occurs?

A: The internal diagnostics run continuous background checks on loop current validity. An out-of-range signal drop below the 4 mA threshold or an open loop triggers a fault state inside the channel logs, changes the respective channel status bit, and illuminates the hardware FAULT LED.

Field Installation Guidelines

Termination Baseplate Alignment: Mount the module exclusively into compatible termination baseplates (such as the 3351-TB assembly). Ensure the high-density backplane pins align squarely with the socket prior to applying locking pressure.
Shielding and Ground Vectoring: Terminate all field transmitter instrument cable shields at the designated chassis ground bar. Do not ground the shield at both the field device and the Triconex panel to prevent creating ground loops that degrade the 12-bit resolution.
Loop Impedance and Sizing: Verify the external 24 VDC nominal loop power supply capacity accounts for a fully loaded 32-point configuration, allowing for adequate voltage margins under maximum over-range current scenarios.
Environmental Enclosure Management: Maintain adequate vertical air spacing within the enclosure cabinet to conform to the continuous operating temperature limits of -20 deg C to +60 deg C without experiencing convective choking.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

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Maintenance Manager, USA

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Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

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Engineering Lead, Germany

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We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.