3674| Triconex|Dual Digital Output Module
Description
The 3674 is a dual digital output (DDO) module designed for safety-critical control programs where low cost is prioritized over maximum availability. It receives output signals from the main processors via a single parallel or series path and applies a 2-out-of-3 voting process to each switch, ensuring safe operation with just enough redundancy. The module is optimized for de-energize-to-trip control programs, providing reliable operation in the presence of most single faults.
Features
- 2-out-of-3 voting process for each switch
- Voltage-loopback circuit for independent verification of output switch operation
- Ongoing diagnostics on each channel and circuit
- Hot-swap capability for online replacement of faulty modules
- Mechanically keyed to prevent improper installation
- Self-protecting design with no external fuses required
- External termination panel (ETP) required for field connections
Technical Specifications
Model Number: 3674
Type: Dual, serial (recommended for de-energize-to-trip control programs)
Output Signals: 32, commoned
Nominal Voltage: 24 VDC
Voltage Range: 16-30 VDC
Maximum Voltage: 36 VDC
Voltage Drop: < 1.5 VDC, typical
Power Module Load: < 10 watts
Current Ratings:
- Maximum: 2A per point
- Surge: 10A for 10 ms
Load Leakage: 2 mA maximum
Point Isolation: 1500 VDC minimum
Diagnostic Indicators:
- ON or OFF state per point
- Module Status: PASS, FAULT, ACTIVE
- Field Alarm: LOAD/FUSE
- Load Alarm, output stuck-ON: Stuck-ON point, all others commanded OFF (de-energized)
- Load Alarm, output stuck-OFF: Stuck-OFF point, all others commanded state — ON or OFF
Color Code: Dark Blue
3674| Triconex|Dual Digital Output Module
3674| Triconex|Dual Digital Output Module
Description
The 3674 is a dual digital output (DDO) module designed for safety-critical control programs where low cost is prioritized over maximum availability. It receives output signals from the main processors via a single parallel or series path and applies a 2-out-of-3 voting process to each switch, ensuring safe operation with just enough redundancy. The module is optimized for de-energize-to-trip control programs, providing reliable operation in the presence of most single faults.
Features
- 2-out-of-3 voting process for each switch
- Voltage-loopback circuit for independent verification of output switch operation
- Ongoing diagnostics on each channel and circuit
- Hot-swap capability for online replacement of faulty modules
- Mechanically keyed to prevent improper installation
- Self-protecting design with no external fuses required
- External termination panel (ETP) required for field connections
Technical Specifications
Model Number: 3674
Type: Dual, serial (recommended for de-energize-to-trip control programs)
Output Signals: 32, commoned
Nominal Voltage: 24 VDC
Voltage Range: 16-30 VDC
Maximum Voltage: 36 VDC
Voltage Drop: < 1.5 VDC, typical
Power Module Load: < 10 watts
Current Ratings:
- Maximum: 2A per point
- Surge: 10A for 10 ms
Load Leakage: 2 mA maximum
Point Isolation: 1500 VDC minimum
Diagnostic Indicators:
- ON or OFF state per point
- Module Status: PASS, FAULT, ACTIVE
- Field Alarm: LOAD/FUSE
- Load Alarm, output stuck-ON: Stuck-ON point, all others commanded OFF (de-energized)
- Load Alarm, output stuck-OFF: Stuck-OFF point, all others commanded state — ON or OFF
Color Code: Dark Blue
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