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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power supports exact-model review and quotation for this ABB normally de-energized output unit.

        DSTD N021 3BSE003239R1

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        1001 reviews ｜ Need a Specific Revision?
        DSTD N021 3BSE003239R1 is ABB normally de-energized output hardware for 24 VDC, 2 A Safeguard control circuits and is no longer offered for sale.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
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        Technical specifications for DSTD N021 3BSE003239R1

        • Manufacturer:
          ABB
        • Part Number:
          DSTD N021 3BSE003239R1
        • Product Family:
          ABB Advant OCS and Advant-800xA
        • Product Type:
          Normally De-Energized Output Unit
        • Stock:
          1
        • ABB type designation:
          DSTD N021
        • Product ID:
          3BSE003239R1
        • Output behavior:
          Normally de-energized
        • Rated voltage:
          24 VDC
        • Rated current:
          2 A
        • Replacement product ID:
          3BNP015174R1
        • Weight:
          0.335 kg
        • Estimated shipping dimensions:
          12.3 x 9 x 1.8 cm
        • Tariff Code:
          85389091
        • Country of origin:
          Sweden
        • 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 Fail-State Logic Circuit Boundary Migration Review Applications

        Features:

        • Normally de-energized output: the fail-state behavior is part of the exact product role
        • Safeguard legacy identity: the ABB material anchors installed-system service
        • Controlled follow-up: the listed replacement ID requires engineering review
        DSTD N021 belongs to ABB Safeguard output hardware and uses normally de-energized operation.

        Its electrical rating sets a necessary circuit boundary but does not define the complete safety function.

        ABB no longer sells the item and provides a replacement reference that must remain subject to system-level validation.

        For DSTD N021 3BSE003239R1 ABB Normally De-Energized Output Unit enquiries, Apter Power supports document review, quotation and procurement coordination.
        ABB DSTD N021 3BSE003239R1 Normally De-Energized Output Unit Manuals,Datasheets,Link Important Notice: No qualified exact-model English PDF is attached. Use the complete product model in every document request.
        • Output behavior: ABB identifies the unit as normally de-energized.
        • Design consequence: replacement logic must preserve the installed cause-and-effect intent.
        • Wrong-part risk: an energized-output assumption changes the circuit response.
        • Release boundary: use the approved Safeguard design as the decision authority.
        • DC application: ABB publishes 24 VDC.
        • Load boundary: the official current rating is 2 A.
        • Engineering use: both values screen the field circuit before a spare is released.
        • Sales status: ABB states that the item is no longer for sale.
        • Listed reference: the product page names 3BNP015174R1.
        • No automatic equivalence: a replacement ID does not prove unchanged wiring or fail-state behavior.
        • Approval path: complete an independent safety-function review before migration.
        • Safeguard output service: maintain the documented normally de-energized circuit role.
        • Legacy spare sourcing: procure the exact ABB output unit for an existing installation.
        • Controlled migration: evaluate the listed replacement within the approved safety design.
        Description
        DSTD N021 3BSE003239R1 is an ABB normally de-energized output unit for 24 VDC, 2 A Safeguard control circuits. Its normal output state is therefore part of the circuit definition, not only a catalog characteristic.

        DSTD N021 3BSE003239R1 must remain associated with the original Safeguard channel function because an energized-output variant would represent different field behavior. The full product identity and the expected normal state belong together in the service record.

        When a circuit using DSTD N021 3BSE003239R1 is serviced, the channel assignment, connected load and required de-energized state should be taken from the installed project documentation. Terminal fit alone is not sufficient to establish the correct output function.
        Alternative Names
        DSTD N021 DSTDN021 3BSE003239R1 DSTD N021 Output Unit ABB DSTD N021 3BSE003239R1 DSTDN0213BSE003239R1 DSTDN021 3BSE003239R1 DSTD N021 3BSE003239R1 DSTD N021-3BSE003239R1
        Technical notes
        ABB defines DSTD N021 3BSE003239R1 as a 24 VDC, 2 A normally de-energized output unit and marks it no longer for sale. Its listed replacement ID is not a drop-in guarantee. Stop any migration until the original fail-state logic, wiring and Safeguard safety function are independently reviewed.
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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.
        VIEW ALL FAQS
        The installed trip circuit expects a normally de-energized output; can DSTD N021 3BSE003239R1 be replaced by a standard energized-output module?
        No. The output behavior is part of the safety design. Hold the change until the approved cause-and-effect and field wiring confirm the same fail-state response.
        A 24 VDC load draws close to the circuit limit; what must be decided before releasing DSTD N021 3BSE003239R1?
        Confirm that the approved design keeps the connected load within the ABB 2 A rating under all operating conditions. Stop release when the verified load basis is missing.
        Does ABB replacement product ID 3BNP015174R1 make DSTD N021 3BSE003239R1 a direct swap?
        No. Treat the listed ID as the start of a migration assessment. Compare fail-state logic, terminal functions and the approved Safeguard design before accepting any conversion.
        What evidence should accompany a used-in-service DSTD N021 3BSE003239R1 offered for a shutdown repair?
        Require a readable product ID, condition evidence and traceability to the normally de-energized output role. Quarantine a unit whose identity or terminal condition cannot be verified.
        After installing DSTD N021 3BSE003239R1, when should the Safeguard loop remain out of service?
        Keep it out of service until the approved proof test demonstrates the intended de-energized response and confirms the actual channel wiring. A powered indication alone is not acceptance evidence.
        A maintenance record contains only 3BSE003239R1; is that sufficient to request DSTD N021 3BSE003239R1?
        Yes for product identification, provided the request also states the installed Safeguard context and normally de-energized duty. Those details keep the purchase tied to the intended safety function.

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