Triconex DO3401 | Model 3401 Digital Output Module

The Model 3401 Digital Output Module is designed for safe, reliable, and highly available operation in critical systems. It employs advanced diagnostics, redundant circuitry, and hot-sparing capabilities to ensure performance and fault detection.

Available Components

Model	Description	Voltage	Type
3401	Digital Output Module	24 V DC	Commoned
2401	Digital Output Baseplate	Direct Termination	–
2402	Digital Output Baseplate	Current Limited	–

Features

Redundant Circuitry:
- Triple Modular Redundancy (TMR) with ASIC-based quad output voting.
- Ensures high availability by voting on signals before applying them to the load.
Output Voter Diagnostic (OVD):
- Detects stuck-on or stuck-off points and switches within 500 ms.
- Enables transparent loop-back testing without affecting most field devices.
- Configurable to disable OVD for sensitive devices.
Hot-Sparing:
- Supports online replacement of faulty modules.
Mechanical Keying:
- Prevents improper installation in the configured baseplate.

Model 3401 Specifications

Feature	Specification
Points	16, commoned
Nominal Output Voltage	24 V DC
Operational Voltage Range	15–30 V DC
Max. Output Voltage	33 V DC
Reverse Input Voltage	–0.6 V DC
Output Current	– Switching: <4.8 A (self-limiting), 3 A typical
	– Carry: >0.7 A (self-limiting), 1.5 A typical
Field Alarms	Loss of field power, output point shorted (On/Off)
Loop-back Thresholds	– Off: 0–5 V DC
	– Transition: 6–14 V DC
	– On: 15–30 V DC
Leakage to Load (Off-state)	<1 mA
Diagnostic Glitch Duration	Max: <2 ms; Typical: 500 µs
Toggle Rates	– Maximum: >20 ms
	– Minimum: Not applicable
On-state Voltage Drop	<1 V DC @ 1.5 A
Loop-back Scan Time	<1 ms for all 16 points
Isolation	– Functional to protective earth: 500 V DC, minimum
	– Functional to functional-earth (logic): 800 V DC, minimum

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