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  • Model 3351 Analog Input Module
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  • Model 3351 Analog Input Module

    triconex Communication Module

    • U.S.$24551.00
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triconex Communication Module

Model 3351 Analog Input Module

Feature Specification

Points 32, commoned

Nominal input current 4–20 mA DC

Operational current range 2–22 mA DC

Absolute maximum field voltage 33 V DC

Absolute maximum reverse field voltage – 0.6 V DC

Absolute maximum input current 50 mA DC

Input bandwidth (3dB) 16 Hz

Source impedance 180 Ω

Input impedance (with baseplate) 250 Ω

I to V resistor 100 Ω, ±0.01%

Resolution 12 bits

Absolute error 0.15% of full scale (20 mA)

Diagnostic Force-to-value diagnostic (FVD)

Scan time <1 ms for all 32 points

Functional-to-protective-earth isolation 500 V DC, minimum

Functional-to-functional-earth (logic)


800 V DC, minimum

The Tricon is a state-of-the art

controller that provides fault tolerance

by means of Triple-Modular Redundant

(TMR) architecture. TMR integrates

three isolated, parallel control systems

and extensive diagnostics in one control

system. The system uses two-out-ofthree

voting to provide high-integrity,

error-free, uninterrupted process operation

with no single point of failure.

The Tricon controller uses three identical

channels. Each channel independently

executes the control program in

parallel with the other two channels.

Specialized hardware/software voting

mechanisms qualify and verify all

digital inputs and outputs from the

field, while analog inputs are subject to

a mid-value selection process.

Because each channel is isolated from

the others, no single-point failure in any

channel can pass to another. If a hardware

failure does occur on one channel,

the other channels override it. Meanwhile

the faulting module can easily be

removed and replaced while the

controller is online without interrupting

the process.

Setting up control programs is simplified

with the triplicated Tricon system,

because it operates as a single control

system from the user’s point of view.

The user terminates sensors and actuators

at a single wiring terminal and 

programs the Tricon with one set of

control program logic. The Tricon

controller manages the rest!


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               All orders are available with UPS, FedEX, USPS,EMS ,TNT and DHL;
               International shipping available with overnight, next day air or expedited shipping
               Ships in stock within 48 hours.


                All our products are covered by our own warranty.

                ✓ 18 months warranty - New parts
                ✓ 6 Months - 12 Months Warranty - Open box Parts
                ✓ 1-6 months warranty - Used parts

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