Invensys DI3301
Invensys DI3301
Invensys DI3301
Invensys DI3301
Invensys DI3301
Invensys DI3301
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DI3301

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DI3301 is a Triconex Trident 32-channel commoned digital input module for nominal 24 V DC signals. It uses triplicated input processing, sub-millisecond scanning, and field voltage diagnostics for safety-system input acquisition.
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Technical specifications for DI3301

  • Manufacturer:
    Invensys
  • Part Number:
    DI3301
  • Product Family:
    Triconex
  • Product Type:
    Trident Digital Input Module
  • Stock:
    1
  • Model:
    3301 / DI3301
  • System:
    Triconex Trident
  • Module type:
    Digital input
  • Input points:
    32 commoned
  • Nominal input:
    24 V DC
  • Operational input range:
    15 to 30 V DC
  • Absolute maximum input:
    33 V DC
  • Absolute maximum reverse input:
    -0.6 V DC
  • Input delay:
    Less than 10 ms
  • Time constant:
    6.4 ms
  • Input impedance without baseplate:
    Greater than 30 kohm
  • Input impedance with baseplate:
    Approximately 3 kohm
  • Input power at 24 V DC:
    0.2 W per point
  • Input power at 33 V DC:
    0.5 W per point
  • Off threshold:
    0 to 5 V DC
  • Transition region:
    6 to 14 V DC
  • Diagnostic method:
    Forced-value diagnostics
  • Diagnostic test duration:
    Less than 2 ms per test
  • Maximum toggle rate:
    Less than 20 per second
  • Input scan:
    Less than 1 ms for all 32 points
  • Functional-to-protective-earth isolation:
    500 V DC minimum
  • Functional-to-functional-earth isolation:
    800 V DC minimum
  • 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 Diagnostics Monitoring Certifications

Features:

  • Provides 32 commoned inputs for nominal 24 V DC signals.
  • Uses triplicated signal paths for Trident safety processing.
  • Scans all input points in less than 1 ms with field voltage diagnostics.
The current ordering identity is DI3301, corresponding to the Trident model 3301 32-point digital input module.

It converts commoned 24 V DC field states into triplicated input data for the safety application.

Match the baseplate, termination, common wiring, system revision, channel map, and proof-test method before installation.

Availability is subject to Apter Power inventory and sourcing confirmation.
Verified resources for Triconex DI3301: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.
  • Acquire discrete trip, permissive, alarm, and equipment-status signals in a Trident application.
  • Monitor nominal 24 V DC field contacts through the documented on and off thresholds.
  • Replace a verified model 3301 module during controlled safety-system maintenance.
  • Forced-value diagnostics test input paths with a disturbance shorter than 2 ms per test.
  • The documented diagnostic glitch remains below 2 ms and approximately 36 percent of test voltage.
  • Input-path diagnostics operate within the maximum specified toggle-rate condition.
  • All 32 input points are scanned in less than 1 ms.
  • Signals from 0 to 5 V DC are interpreted off and 15 to 30 V DC are interpreted on.
  • The 6 to 14 V DC transition region must not be treated as a valid steady field state.
  • Functional-to-protective-earth isolation is documented at 500 V DC minimum.
  • Functional-to-functional-earth isolation is documented at 800 V DC minimum.
  • The module must be installed and proof-tested within the certified Trident system configuration.
Description
Triconex DI3301 is a Trident digital input module with 32 commoned points for nominal 24 V DC field signals. It detects discrete states across the documented input range and transfers them through isolated Trident I/O buses.

Triplicated input processing, sub-millisecond scanning, and forced-value diagnostics provide fast state recognition with continuous module-health awareness. The design supports emergency shutdown inputs, turbine and burner permissives, equipment protection, and other safety-related discrete functions.

System integration requires the correct Trident baseplate, commoned field-power arrangement, termination hardware, channel map, and supported system configuration. Point-to-point testing and the approved proof-test sequence confirm that every signal reproduces the validated safety behavior.
Alternative Names
DI3301 DI-3301 DI 3301 3301 Digital Input Module Triconex DI3301 Tricon DI3301 Trident 3301 Invensys Triconex 3301 DI
Technical notes
Verify the Trident baseplate, commoned 24 V field wiring, channel map, diagnostics, isolation, system release, and proof-test procedure before installing DI3301.
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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.
What input arrangement is provided by Triconex DI3301?
The model 3301 module provides 32 commoned digital input points for nominal 24 V DC operation.
Which Trident hardware must be checked for Triconex DI3301 compatibility?
Confirm the exact Trident baseplate, field termination, commoning scheme, logic interface, module revision, and supported system release.
Where is Triconex DI3301 used in a safety system?
It acquires 24 V DC field states through triplicated paths for processing by a Trident safety application.
How is Triconex DI3301 supply status confirmed?
Apter Power verifies available stock, revision, price, and delivery against the requested DI3301 nameplate and destination.
What replacement tests are required for Triconex DI3301?
Verify channel mapping, off/transition/on thresholds, diagnostic response, isolation, alarm handling, and the plant-approved proof test before service.
Which manual supports a Triconex DI3301 enquiry?
The Apter PDF reproduces the 3301 module pages from the Trident Planning and Installation Guide; send the nameplate, baseplate details, quantity, and destination.