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TRICONEX AO3481 Analog Output Module

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BRAND	TRICONEX
Model Number	AO 3481
Module Description	Analog Output Module
Country of Origin	USA
Weight	1.46kg
Dimension	4.3x18.8x21.8cm

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Why Choose AMIKON?

At AMIKON, we understand that every minute of downtime matters. That’s why we’ve built our business around one core promise: making sure you never have to wait for the part you need.

We Solve Discontinued Part Challenges
"We maintain a large inventory of discontinued parts — so you can keep legacy systems running without long lead times."

We Deliver More Than Just Parts
"Whether it’s a rare spare part, urgent service, or faster delivery, we go the extra mile to ensure your operations stay on track."

We Combine Expertise with Reliability
"At AMIKON, we bring together the best people and the right parts — delivering not just products, but trust and peace of mind."

In short: We don’t just supply parts. We keep your systems — and your business — moving.

Miya Whatsapp/phone: +86 18020776792 Miya Email: sales@amikon.cn

Analog Output Modules

Analog Output (AO) Modules contain the circuitry for three identical, isolated channels. Each channel includes a proprietary ASIC that receives its output table from the I⁄O communication processor on its corresponding main processor. The AO Modules use special shunt circuitry to vote on the individual output signals before they are applied to the load. This voter circuitry insures only one output, A or B or C, is driving the field load. The shunt output circuitry provides multiple redundancy for all critical signal paths, guaranteeing safety and maximum availability.

The AO Modules continuously execute forced-switch diagnostics (FSD) on each point. By carefully forcing error conditions and observing proper behavior of the voting circuitry, high reliability and safe operation is insured. This safety feature allows unrestricted operation under a variety of multiple-fault scenarios.

The AO Modules support hot sparing for online replacement of a faulty module or continuous back-up to an active module. The AO Modules are mechanically keyed to prevent improper installation in a configured baseplate.

Model 3481 Analog Output Module

Model 3481 Analog Output Module Simplified Schematic

Model 3481 Analog Output Module Specifications

Feature	Specification
Points	4, commoned-return, DC-coupled
Output Current Range	4–20 mA output, controlled 0–22 mA over-range 0 mA output capability (step function <2mA)
Output Accuracy	<0.25% (in range of 4–20 mA) of FSR (0–22 mA), from 0° C to 70° C (32° F to 158° F)
Type	TMR
Resolution	12 bits
Diagnostic	Forced-switch diagnostic (FSD)
External loop power (reverse voltage-protected)	32 V DC maximum; 24 V DC nominal
Output loop power requirements for specified load	300 Ω @ >16 V DC (1 A minimum) 500 Ω @ >20 V DC (1 A minimum) 700 Ω @ >24 V DC (1 A minimum) 800 Ω @ >28 V DC (1 A minimum)
Over-range Protection	36 V DC continuous; 0 V DC continuous
Switch Time on Leg Failure	1 ms typical; 3 ms maximum
Functional-to-Protective-Earth Isolation	500 V DC minimum
Functional-to-Functional-Earth (Logic) Isolation	800 V DC minimum

FAQ

Q	How does the Triconex AO 3481 ensure deterministic analog signal delivery in high-integrity safety instrumented systems?
A	The Triconex AO 3481 employs a TMR architecture and controlled 4–20 mA analog output channels, enabling highly reliable and deterministic signal transmission for critical industrial automation and safety applications.
Q	What output performance parameters distinguish the Triconex AO 3481 in precision process control environments?
A	The Triconex AO 3481 provides four DC-coupled commoned-return outputs with a 4–20 mA controlled range, 0–22 mA over-range capability, 12-bit resolution, and output accuracy better than 0.25% of full-scale range.
Q	Why is the Triconex AO 3481 particularly suitable for fault-tolerant analog output applications?
A	The Triconex AO 3481 incorporates Triple Modular Redundancy (TMR), forced-switch diagnostics (FSD), and rapid leg-failure switch times, helping maintain uninterrupted operation and high system availability.
Q	Which external loop power and load conditions must be considered when integrating the Triconex AO 3481?
A	The Triconex AO 3481 supports reverse-voltage-protected loop power up to 32 V DC, with nominal 24 V DC operation, and accommodates specified load resistances ranging from 300 Ω to 800 Ω depending on the applied loop voltage.
Q	How does the Triconex AO 3481 enhance diagnostic transparency and electrical isolation in critical installations?
A	The Triconex AO 3481 features integrated forced-switch diagnostics, continuous over-range protection, and high isolation ratings between functional circuits and protective earth, improving fault detection and system robustness.

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