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3674

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Triconex 3674 is a 32-point dual 24 VDC digital output module with self-protected switches for commoned loads in Tricon control systems.
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Technical specifications for 3674

  • Manufacturer:
    Invensys
  • Part Number:
    3674
  • Product Family:
    Triconex
  • Product Type:
    Dual Digital Output Module
  • Stock:
    1
  • Output signals:
    32, commoned
  • Nominal voltage:
    24 VDC
  • Voltage range:
    16 to 30 VDC
  • Maximum voltage:
    36 VDC
  • Module architecture:
    Dual digital output
  • Recommended program style:
    De-energize-to-trip
  • Maximum point current:
    2 A
  • Surge current:
    10 A for 10 ms
  • Typical voltage drop:
    <1.5 VDC
  • Maximum load leakage:
    2 mA
  • Logic power load:
    <10 W
  • Point isolation:
    1500 VDC minimum
  • Field fuses:
    Not required; self-protecting
  • Point indicators:
    On / Off, one per point
  • Module indicators:
    PASS / FAULT / ACTIVE
  • Field indication:
    LOAD / FUSE
  • Standard ETP:
    9662-610F
  • Nonincendive ETP:
    9671-610F
  • ERT option:
    9671-810F
  • Operating temperature:
    0 to 60 °C
  • Storage temperature:
    -40 to 85 °C
  • Relative humidity:
    5 to 95%, non-condensing
  • Installation environment:
    Industrial control enclosure
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Applications Monitoring & Control Performance Protection

Features:

  • Supplies thirty-two commoned 24 VDC output signals.
  • Uses self-protecting switches rated for two amperes per point.
  • Supports de-energize-to-trip behavior during a stuck-on fault.
The selected module is the 3674 dual-output version rather than the similar 3664 operating-behavior variant.

It sources DC power to field devices and monitors the commanded state through ongoing diagnostics.

Engineering review must cover the total current, surge profile, common field supply and fault-response expectations.

Availability is subject to Apter Power inventory and sourcing confirmation.
Verified resources for Triconex 3674:Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Drives groups of 24 VDC shutdown solenoids in de-energize-to-trip schemes.
  • Controls commoned DC actuators that require point diagnostics without external output fuses.
  • Provides a like-for-like spare for installed 3674 safety-output positions.
  • Point indicators show the commanded on or off state for all thirty-two outputs.
  • Module status indicators report PASS, FAULT and ACTIVE conditions to maintenance personnel.
  • A field alarm identifies load or switch behavior that does not follow the commanded result.
  • The operational field-voltage window is 16 to 30 VDC with a 36 VDC maximum.
  • Each point supports up to 2 A and the documented ten-millisecond surge limit.
  • Typical on-state drop remains below 1.5 VDC in the stated load range.
  • Output switches are self-protecting, so the standard termination does not require individual fuses.
  • Minimum point isolation is specified at 1500 VDC.
  • The stuck-on response commands the remaining outputs to their de-energized state.
Description
Triconex 3674 provides thirty-two 24 VDC outputs through a dual-channel safety-oriented design. Serial output data is checked by independent circuits before the module drives commoned field loads. The dual-output design uses thirty-two commoned 24 VDC channels and electronically protected switching instead of field-replaceable point fuses.

Its behavior is optimized for de-energize-to-trip programs: when diagnostics identify a stuck-on point, the other outputs are commanded off. Self-protecting switches remove the need for individual termination fuses in the documented configuration. A low on-state drop and short-duration surge capability make the module suitable for DC loads with demanding pickup behavior while preserving voted control logic.

A replacement must keep the 16–30 VDC field range, current budget, termination option and program fail-state strategy intact. Verify surge demands and total commoned load before returning the rack to operation. Termination choices include the standard and nonincendive 9662/9671 families, so the installed ETP designation remains part of the hardware selection.
Alternative Names
3674 Triconex 3674 Tricon 3674 Schneider Electric Triconex 3674 3674 Digital Output Module 3674 24 VDC Digital Output Module 3674 Dual Digital Output Module 3674 Self-Protected Output Module
Technical notes
3674 intentionally de-energizes other points after a stuck-on diagnosis; confirm the process fail-state philosophy before substitution or logic changes.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Which specification separates 3674 from a look-alike module?
The 3674 label and its stuck-on response distinguish it from 3664 even though both are thirty-two-point 24 VDC dual-output modules.
What compatibility point matters most when selecting 3674?
Confirm the Tricon baseplate, commoned field supply and documented 9662/9653/9671 termination option used in the cabinet.
For which maintenance or control duty is 3674 intended?
It drives de-energize-to-trip solenoids, relays and other DC final elements in safety applications.
How should a purchaser request verified availability for 3674?
Apter Power can review the exact revision and provide current sourcing, condition and lead-time information.
What site details prevent an incorrect 3674 substitution?
Keep the point map, fail-state logic, total current and surge allowance unchanged and validate all alarms after replacement.
Which nameplate and project details should be sent for a 3674 quote?
Send the module photo, termination-panel model, field-voltage source, maximum load, quantity and delivery location.

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