Invensys Triconex|3401|Digital Output Module
Description
The 3401 Digital Output Module provides 16 commoned output points for controlling field devices. It uses proprietary ASICs and quad output circuitry to ensure safety and reliability through redundancy.
Features
- Channels: Three identical, isolated channels
- Redundancy: Quad output circuitry for critical signal paths
- Safety Feature: Output voter diagnostic (OVD) routine
- Hot Swappable: Supports online replacement
Technical Specifications
- Points: 16, commoned
- Nominal Output Voltage: 24 V DC
- Operational Voltage Range: 15–30 V DC
- Absolute Maximum Output Voltage: 33 V DC
- Absolute Maximum 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
-
Loop-back Thresholds:
- Off region: 0–5 V DC
- Transition region: 6–14 V DC
- On region: 15–30 V DC
- Leakage to Load (Off-state): <1 mA
- Diagnostic Glitch Duration: <2 ms (maximum), 500 µs (typical)
- 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
Invensys Triconex|3401|Digital Output Module



Invensys Triconex|3401|Digital Output Module
Description
The 3401 Digital Output Module provides 16 commoned output points for controlling field devices. It uses proprietary ASICs and quad output circuitry to ensure safety and reliability through redundancy.
Features
- Channels: Three identical, isolated channels
- Redundancy: Quad output circuitry for critical signal paths
- Safety Feature: Output voter diagnostic (OVD) routine
- Hot Swappable: Supports online replacement
Technical Specifications
- Points: 16, commoned
- Nominal Output Voltage: 24 V DC
- Operational Voltage Range: 15–30 V DC
- Absolute Maximum Output Voltage: 33 V DC
- Absolute Maximum 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
-
Loop-back Thresholds:
- Off region: 0–5 V DC
- Transition region: 6–14 V DC
- On region: 15–30 V DC
- Leakage to Load (Off-state): <1 mA
- Diagnostic Glitch Duration: <2 ms (maximum), 500 µs (typical)
- 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