siemens 6DD1681-0AJ1
siemens 6DD1681-0AJ1
siemens 6DD1681-0AJ1
siemens 6DD1681-0AJ1
siemens 6DD1681-0AJ1
siemens 6DD1681-0AJ1
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6DD1681-0AJ1

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Siemens 6DD1681-0AJ1 is an SU12 passive interface module used to terminate ten SIMATIC TDC or SIMADYN D signals at accessible plant-side spring terminals.
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Technical specifications for 6DD1681-0AJ1

  • Manufacturer:
    Siemens
  • Part Number:
    6DD1681-0AJ1
  • Product Family:
    Siemens Simadyn
  • Product Type:
    SIMATIC TDC SU12 Interface Module
  • Stock:
    1
  • Interface Module:
    SU12
  • System Connector:
    X1, 10-pole
  • Plant Connector:
    X2, 16 spring terminals; 10 assigned signal terminals and 6 unused terminals
  • Signal Transfer:
    Bidirectional 1:1 connection
  • Maximum Signal Amplitude:
    60 V, 0.5 A
  • Maximum Cable Cross-Section:
    1.5 mm²
  • Protection:
    Fuses on documented signal paths, BAT46 protective diode, and PTC short-circuit protection
  • Dimensions:
    4.5 × 13.0 × 15.6 cm
  • Weight:
    0.28 kg
  • Tariff Code:
    8538900000
  • Country of origin:
    Germany
  • 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 Signal Path Termination Protection Application
  • Transfers ten signals between a keyed 10-pole system connector and plant terminals
  • Provides a bidirectional 1:1 path without galvanic isolation or signal conversion
  • Includes documented fuse, diode, and PTC protection components on assigned paths

6DD1681-0AJ1 is the SU12 passive interface assembly for compatible SIMATIC TDC and SIMADYN D signal-cable systems.

It converts the physical connection format from the system cable to accessible spring terminals while retaining the original signal level and direction.

Before replacement, match the article number, system module, SC cable, X1 keying, X2 terminal map, electrical limits, conductor size, and protection-component condition.

Availability, condition, price, and shipping time for 6DD1681-0AJ1 are confirmed during quotation.

Siemens 6DD1681-0AJ1 SIMATIC TDC SU12 Interface Module Manuals, Datasheets, Links

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.

  • Transfer ten assigned signals directly between X1 and X2
  • Treat every path as non-isolated and without signal conversion
  • Observe both SU12 and connected-module voltage/current limits
  • Use the documented X2 spring terminals for plant-side conductors
  • Preserve terminal numbering and signal direction during rewiring
  • Keep the six unused X2 terminals free of unintended connections
  • Inspect the documented 0.5 A slow-blow fuse paths
  • Verify the BAT46 protective-diode circuit where assigned
  • Check the PTC short-circuit protection path before returning signals to service
  • Plant-side signal termination for SIMATIC TDC interface wiring
  • FM 458-1 DP signal breakout through the documented SC64 cable arrangement
  • SIMADYN D or compatible system-module connection to accessible field terminals
Description
6DD1681-0AJ1 is a Siemens SU12 interface module for compatible SIMATIC TDC, SIMADYN D, and FM 458 signal arrangements.

It transfers ten signals bidirectionally and directly between the 10-pole X1 system connector and the assigned X2 spring terminals without changing their signal levels.

Before installation, confirm the complete article number, source module, SC-series cable, X1-to-X2 pin map, signal limits, conductor size, and fuse, diode, and PTC condition.
Alternative Names
6DD1681-0AJ1 Siemens 6DD1681-0AJ1 Siemens SU12 6DD1681-0AJ1 SIMATIC TDC 6DD1681-0AJ1 SIMADYN D 6DD1681-0AJ1 SU12 Interface Module 6DD1681-0AJ1
Technical notes
6DD1681-0AJ1 provides a non-isolated 1:1 SU12 signal path; verify the mating 10-pole cable, spring-terminal wiring, connected-module voltage limits, and protective components because it performs no signal conversion.
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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.
Does Siemens 6DD1681-0AJ1 isolate or convert field signals?
No. Siemens documents the SU12 as a non-isolated 1:1 interface; connected-module limits and field-signal compatibility must therefore be checked directly.
Which cable arrangement should be verified for Siemens 6DD1681-0AJ1?
Identify the source module and use the documented SC-series interface cable and 10-pole X1 connection; preserve the exact X1-to-X2 signal mapping.
What must be checked before moving wiring to Siemens 6DD1681-0AJ1?
Record every X2 terminal, conductor number, signal direction, voltage, current, shield/ground treatment, and corresponding system-side X1 pin before disconnecting the old module.
Why might a signal disappear after replacing Siemens 6DD1681-0AJ1?
Check the 1:1 pin mapping, X1 connector seating, X2 spring-terminal contact, cable continuity, documented fuses, protective diode/PTC paths, and the connected module's channel state.
Can Siemens 6DD1681-0AJ1 be used when field voltage exceeds the connected module limit?
No. The SU12 does not condition or isolate the signal; the allowable voltage is constrained by both the SU12 rating and the connected system module.
How should Siemens 6DD1681-0AJ1 be tested after wiring?
With outputs held in a safe state, verify continuity and terminal identity, then energize under the machine procedure and compare each field signal with its corresponding system channel.
What physical details matter when replacing Siemens 6DD1681-0AJ1?
Confirm the complete article number, SU12 housing, 10-pole X1 interface, X2 terminal assembly, mounting space, connector keying, and condition of the replaceable protection components.

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