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      6DD1681-0AJ1

      SIMATIC TDC SU12 Ten-Signal Interface Module

      Product Describe：

      Siemens 6DD1681-0AJ1 provides a direct galvanic 1:1 wiring transition between the controller-side ribbon cable and field wiring, so signal type, reference potential, screening, and limits remain those of the connected TDC or FM 458 module.

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      Technical specifications Information Alternative names Technical notes FAQ

      Technical specifications for 6DD1681-0AJ1

      Technical specifications for 6DD1681-0AJ1

      • Manufacturer:
        Siemens
      • Product Category:
        DCS System
      • Spare Part Number:
        6DD1681-0AJ1
      • Estimated shipping dimensions:
        4.5x15.5x12.5cm
      • Weight:
        0.2 kg
      • Tariff Code:
        8537101101
      • Counliy of origin:
        Germany
      • Interface module:
        SU12
      • Controller-side connector:
        10-pole connector X1
      • Plant-side signal terminals:
        10 spring-loaded terminals
      • Additional terminals:
        6 unused spring-loaded terminals
      • Signal capacity:
        10 analog or digital signals
      • Connection behavior:
        Direct 1:1; no signal conversion
      • Published use:
        SIMATIC TDC / FM 458-1DP
      • Weight:
        0.335 kg (0.739 lb) net weight — Siemens SiePortal for complete catalog number 6DD1681-0AJ1.
      • Dimensions:
        Siemens SiePortal lists official packaging dimensions 26.2 × 17.7 × 8.8 cm (L × W × H). Exact device W × H × D is not stated; do not use packaging dimensions for mounting.
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      Information

      Information

      Overview Manuals Common Applications Product Precautions
      The Siemens 6DD1681-0AJ1 is an SU12 interface module for SIMATIC TDC and FM 458-1DP. It transfers ten analog or digital signals from a 10-pole ribbon-cable connector to plant-side spring-loaded terminals without signal conversion.
      • SU12
      • 10-pole connector X1
      • 10 spring-loaded terminals
      • 6 unused spring-loaded terminals

      It provides a direct galvanic 1:1 wiring transition between the controller-side ribbon cable and field wiring, so signal type, reference potential, screening, and limits remain those of the connected TDC or FM 458 module.

      Important Notice: Use the complete 6DD1681-0AJ1 code and verify the physical nameplate and current Siemens documentation before installation or replacement.

      Apter Power 6DD1681-0AJ1 Manuals and Guides

      Important Notice: These are two separate Apter Power documents prepared from the manufacturer-published Siemens information named in each document. Confirm the physical nameplate, current Siemens documents, and host-system requirements before installation or replacement.

      Cabinet signal breakout
      Terminate ten controller signals at spring-loaded field terminals.
      Test and maintenance access
      Create a traceable transition between ribbon cable and plant wiring.
      TDC interface organization
      Keep direct signals grouped without adding conversion.
      Read and follow the exact Siemens documentation and host-equipment instructions before use. Verify 6DD1681-0AJ1 from the physical nameplate.
      1
      Do not treat SU12 as an isolator or level converter
      2
      Verify the host connector pinout before wiring
      3
      Preserve signal reference and shielding
      4
      Label every direct 1:1 circuit
      5
      Follow ESD and de-energized-work requirements

      Alternative Names

      Alternative Names

      6DD1681-0AJ1 6DD1681 0AJ1 Siemens 6DD1681-0AJ1

      Technical notes

      Technical notes

      Use the complete 6DD1681-0AJ1 identity. The 2024 Siemens interface-module documentation continues to identify SU12 article 6DD1681-0AJ1. Confirm current ordering and service availability with Siemens. Values not published in the cited Siemens source are intentionally not inferred.

      FAQS

      • What is Siemens 6DD1681-0AJ1?
        The Siemens 6DD1681-0AJ1 is an SU12 interface module for SIMATIC TDC and FM 458-1DP. It transfers ten analog or digital signals from a 10-pole ribbon-cable connector to plant-side spring-loaded terminals without signal conversion.
      • What is the specific function of 6DD1681-0AJ1?
        It provides a direct galvanic 1:1 wiring transition between the controller-side ribbon cable and field wiring, so signal type, reference potential, screening, and limits remain those of the connected TDC or FM 458 module.
      • Which signals, power, or data does 6DD1681-0AJ1 handle?
        Interface module: SU12. Controller-side connector: 10-pole connector X1. Plant-side signal terminals: 10 spring-loaded terminals. Additional terminals: 6 unused spring-loaded terminals.
      • Which system uses 6DD1681-0AJ1?
        6DD1681-0AJ1 belongs to the SIMATIC TDC / FM 458-1DP context described in the cited Siemens source.
      • Which components are compatible with 6DD1681-0AJ1?
        Ten-pole ribbon cable and host module explicitly permitted by Siemens Analog or digital field circuits within the connected module limits Cabinet grounding and shielding arrangement required by the TDC/FM 458 documentation
      • Where is 6DD1681-0AJ1 applied?
        Cabinet signal breakout: Terminate ten controller signals at spring-loaded field terminals. Test and maintenance access: Create a traceable transition between ribbon cable and plant wiring. TDC interface organization: Keep direct signals grouped without adding conversion.
      • What is the lifecycle status of 6DD1681-0AJ1?
        The 2024 Siemens interface-module documentation continues to identify SU12 article 6DD1681-0AJ1. Confirm current ordering and service availability with Siemens.
      • What must be checked before installing 6DD1681-0AJ1?
        Do not treat SU12 as an isolator or level converter Verify the host connector pinout before wiring Preserve signal reference and shielding Label every direct 1:1 circuit Follow ESD and de-energized-work requirements
      Trusted by 5,000+ plants worldwide | Backed by our vast inventory of top-tier control parts, modules and cards, fast shipments are dispatched to cover your urgent needs. ABOUT US >>
      Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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