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6DD1688-0AE2

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On a SIMADYN D CS7 carrier, Siemens 6DD1688-0AE2 provides the SS52 PROFIBUS-DP master/slave and MPI communication path from its assigned receptacle.

Process data for 6DD1688-0AE2 passes between the communication function and the CPU through the CS7 dual-port RAM, including configured SYNC, FREEZE, and shared-input behavior.

Connector X5 on 6DD1688-0AE2 combines isolated RS485 communication, an isolated 5 V optical-link supply, and an RS232 diagnostic path. Receptacle LEDs report operating, initialization, bus, and fault states.
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Technical specifications for 6DD1688-0AE2

  • Manufacturer:
    Siemens
  • Part Number:
    6DD1688-0AE2
  • Product Family:
    Siemens Simadyn
  • Product Type:
    SIMADYN D SS52 PROFIBUS-DP Communication Module
  • Stock:
    1
  • Bus Role:
    PROFIBUS-DP master or slave
  • Additional Protocol:
    MPI for SIMATIC S7/M7
  • PROFIBUS Functions:
    Shared input, SYNC, and FREEZE
  • Carrier Module:
    CS7 support module
  • Maximum Communication Modules per CS7:
    3
  • CPU Data Exchange:
    16 kbyte dual-port RAM on CS7
  • PROFIBUS Electrical Format:
    Electrically isolated RS485
  • Parameterization and Diagnostics:
    RS232
  • Optical Link Module Supply:
    Isolated 5 V
  • Bus Connector:
    9-pin Sub-D socket X5
  • Diagnostics:
    Two LEDs per CS7 receptacle
  • Required 5 V Current:
    Maximum 0.7 A
  • Required +15 V Current:
    Maximum 10 mA
  • Required -15 V Current:
    Maximum 10 mA
  • Weight:
    0.441 lbs (0.2 kg)
  • Tariff Code:
    8517620090
  • 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 CS7 Bus X5 LEDs

Features:

  • The SS52 adds PROFIBUS-DP master/slave and MPI communication to a SIMADYN D CS7 support module.
  • A 16 kbyte dual-port RAM on the CS7 carries data between the communication path and CPU modules.
  • Connector X5 combines isolated RS485, RS232 service signals, and an isolated 5 V optical-link supply.
One configured CS7 communication receptacle carries Siemens 6DD1688-0AE2 inside the SIMADYN D station.

Bus data from 6DD1688-0AE2 crosses the CS7 dual-port memory before it reaches the associated CPU functions.

The connector and diagnostic LEDs of 6DD1688-0AE2 separate network traffic, service access, and fault indication.

The Siemens 6DD1688-0AE2 SIMADYN D SS52 PROFIBUS-DP Communication Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6DD1688-0AE2 SIMADYN D SS52 PROFIBUS-DP Communication Module Manuals,Datasheets,Link 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.

Carrier Receptacle and CPU Exchange

  • Plug-in position: The SS52 enters the SIMADYN D station through a configured receptacle on the CS7 carrier.
  • Carrier capacity: One CS7 accepts no more than the documented number of communication modules.
  • Shared memory: The CS7 dual-port RAM provides the data-transfer boundary between communication and CPU modules.
  • HWConfig entry: The support module, receptacle, and SS52 assignment must agree with the station configuration.

Master/Slave Traffic and Bus Functions

  • Master role: The configured module controls the assigned PROFIBUS-DP exchanges when it operates as master.
  • Slave role: In slave mode, data maps to the areas defined for the supervising DP master.
  • Shared input: Configured stations can consume the same input data through the documented DP function.
  • SYNC and FREEZE: The DP control commands coordinate output or input states across the assigned slave group.

Bus, Service, and Optical-Link Paths

  • RS485 pair: Pins 3 and 8 carry the isolated PROFIBUS receive/transmit pair.
  • RS232 service: The transmit, receive, and ground pins serve SS52 loading or diagnostic access.
  • OLM supply: The isolated external 5 V and ground pins feed supported optical link modules.
  • Termination: The selected SINEC L2 connector or terminal closes the bus at the required network end.

Initialization, Bus, and Grounding Checks

  • LED pair: Green and yellow indications on the CS7 receptacle distinguish initialization, bus activity, and faults.
  • Bus fault: A flashing fault pattern directs inspection to wiring, termination, parameterization, and the bus state.
  • Front bond: The module front panel connects to the CS7 front panel with the supplied bonding path.
  • Cable screen: A broad grounding connection at cabinet entry and connector housing completes the EMC screen path.
Description
Siemens 6DD1688-0AE2 is a SIMADYN D SS52 communication module that adds PROFIBUS-DP master/slave and MPI functions through a CS7 support module.
Alternative Names
6DD16880AE2 6DD1688 0AE2 6DD 1688 0AE2 Siemens 6DD1688-0AE2 6DD1688-0AE2 SS52 6DD1688-0AE2 Communication Module 6DDI688-0AE2 6DD1688-OAE2
Technical notes
Through shared RAM, isolated RS485, and an RS232 service path, Siemens 6DD1688-0AE2 links a SIMADYN D CS7 carrier to PROFIBUS-DP and MPI.
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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.
Why does 6DD1688-0AE2 remain in an initialization state after power-up?
Compare the 6DD1688-0AE2 CS7 receptacle, HWConfig entry, bus database, parameterization, and CPU state with the LED pattern shown for SS52.
What should be checked when 6DD1688-0AE2 reports a PROFIBUS bus fault?
Inspect the 6DD1688-0AE2 X5 RS485 pair, connector seating, termination, station address, baud-dependent drop cable, and configured master/slave role.
Why can RS232 diagnostics work while PROFIBUS data on 6DD1688-0AE2 remains inactive?
The 6DD1688-0AE2 RS232 service path is separate from the isolated RS485 bus; verify DP configuration, wiring, termination, and active CPU data exchange.
How is missing CPU data distinguished from a network fault on 6DD1688-0AE2?
Check the 6DD1688-0AE2 CS7 dual-port RAM exchange, CPU state, receptacle assignment, and LEDs before treating the condition as an external PROFIBUS fault.
What grounding checks reduce communication errors on 6DD1688-0AE2?
Confirm the 6DD1688-0AE2 front-panel bond, broad cable-screen grounding at cabinet entry, tightly fastened connector housing, and continuous equipotential path.
Why does an optical link module connected through 6DD1688-0AE2 fail to start?
Measure the isolated 5 V OLM supply on 6DD1688-0AE2 X5, verify its return pin, RTS control arrangement, connector pinning, and OLM load.

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