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6DD1681-0AG2

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Siemens 6DD1681-0AG2 is the SB70 interface module for SIMATIC TDC and FM 458-1DP systems, adapting eight controller outputs to plant voltage through relay isolation.
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Technical specifications for 6DD1681-0AG2

  • Manufacturer:
    Siemens
  • Part Number:
    6DD1681-0AG2
  • Product Family:
    SIMATIC TDC
  • Product Type:
    SIMATIC TDC SB70 relay output interface module
  • Stock:
    1
  • Product type designation:
    SB70
  • Controller-side signal pins:
    8 signal pins plus 1P/1M supply pair
  • Type of digital output:
    Relays
  • Number of digital outputs:
    8
  • Output Voltage:
    Max. 120 V DC / AC
  • Display:
    LED indication
  • Connection Cable:
    SC62
  • Compatible Systems:
    SIMATIC TDC / FM458-1DP
  • Weight:
    0.7937 lbs (0.36 kg)
  • Estimated shipping dimensions:
    4.5 x 15.9 x 12.9 cm
  • Tariff Code:
    8537101190
  • 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 Applications Compatibility Installation & Integration Diagnostics & Protection

Features:

  • Eight binary output channels connect the controller to plant-side relay circuits.
  • Relay contacts provide electrical isolation between controller signals and field outputs.
  • LED indicators support local checks of module and supply conditions.

The SB70 is the eight-output relay interface configuration for SIMATIC TDC and FM 458-1DP systems.

It adapts controller-side output signals to plant circuits through relay contacts, supporting discrete actuator and interlock commands.

Confirm load voltage, contact assignment, cable selection and system wiring before installation or replacement.

Availability is subject to Apter Power inventory and sourcing confirmation.
Verified resources for Siemens 6DD1681-0AG2: 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.
  • Switch discrete plant loads from SIMATIC TDC or FM 458-1DP output logic.
  • Use relay output circuits where controller-side electrical separation from the field is required.
  • Apply the module in discrete control paths such as actuator commands and interlocks.
  • The documented host systems are SIMATIC TDC and FM 458-1DP.
  • Siemens identifies the SC62 cable for connecting this interface-module family to system components.
  • Confirm the signal-module connector and the assigned output channel before selecting a replacement.
  • The snap-on housing mounts to a standard mounting rail.
  • Controller-side signals enter through flat-cable connector X1, with the supply pair assigned to X3.
  • Field wiring uses X2 relay terminals for normally open, normally closed and common contacts.
  • LED indicators provide local diagnostic visibility for module operation.
  • Relays electrically isolate the controller-side inputs from plant-side output circuits.
  • A PTC thermistor protects the cable path after the system-side supply connection.
Description
The 6DD1681-0AG2 is a binary output module (binary output SB70, 8 BO) used in the SIMATIC TDC system. It supports up to 120 V DC/AC, features LED indication, and provides galvanic isolation. The module 6DD1681-0AG2 functions as an SB70 interface module, playing a key role in adapting digital output signals within the system.

The SB70 interface module (6DD1681-0AG2) is used to adapt eight digital output signals from SIMATIC TDC / FM458-1DP to the required plant signal level through relay-based electrical isolation. With this isolated design, the 6DD1681-0AG2 enhances signal safety and overall system reliability.
Alternative Names
6DD1681-0AG2 6DD 1681 0AG2 6DD16810AG2 Siemens 6DD1681-0AG2 Siemens SB70 SIMATIC TDC SB70 interface module Siemens SIMATIC TDC SB70
Technical notes
For 6DD1681-0AG2, verify field voltage and contact wiring before replacement; its relay interface is rated up to 120 V AC/DC.
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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 type of rail-mount enclosure is used by Siemens 6DD1681-0AG2?
The SB70 uses a housing that snaps onto a mounting rail.
What is wired through connector X1 on Siemens 6DD1681-0AG2?
X1 is the flat-cable connector with eight signal pins and the 1P/1M system-side supply pair.
How do the LEDs on Siemens 6DD1681-0AG2 support diagnostics?
The module provides LED indicators for local diagnostic checks; interpret each state using the Siemens hardware documentation.
Does Siemens 6DD1681-0AG2 isolate controller signals from field outputs?
Yes. Relay contacts provide electrical isolation between controller-side signals and plant-side output circuits.
Which field contacts are available at X2 on Siemens 6DD1681-0AG2?
The two 12-pole X2 connectors provide terminals for normally open, normally closed and common relay contacts.
Which connection cable is documented for Siemens 6DD1681-0AG2?
Siemens identifies cable SC62 for connecting this interface-module family to SIMATIC TDC / FM 458-1DP components; confirm the installed system wiring before ordering.

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