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      Siemens 6ES7138-4DB03-0AB0
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      6ES7138-4DB03-0AB0

      ET 200S SSI Interface

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          PRODUCT DESCRIPTION

          Acquire absolute encoder positions through the SSI interface

          Siemens 6ES7138-4DB03-0AB0 is the ET 200S 1SSI electronic module for connecting one absolute SSI encoder to a controller. It supports encoder widths from 13 to 25 bits, with configurable data handling and standard or Fast operating modes.

          Standard mode provides event-driven latching and two comparison results in the feedback interface. Fast mode reduces the available functions for rapid position acquisition. Encoder format, clock rate, cable length and station support must be matched before using the module in a maintained installation.
          BEFORE YOU BUY

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          ACTUAL APPLICATIONS

          Industrial Production and Service Sectors

          These industry examples describe Siemens' broader market coverage, not verified installations of this exact product. Product suitability depends on the documented configuration and engineering requirements.
          • 01 · FOOD & BEVERAGE

            Bakery, Confectionery and Sugar Manufacturing

            Bakery and confectionery manufacturing across diverse consumer food categories.Sugar manufacturing and processing within the commercial food industry.
          • 02 · TEXTILE MANUFACTURING

            Natural Fibers and Fabric Production

            Natural fiber production and processing within the textile industry.Fabric production spanning the wider commercial textile manufacturing sector.
          • 03 · PLASTICS PROCESSING

            Extruded and Thermoformed Plastics

            Plastic extrusion for material production within the plastics industry.Thermoforming as a manufacturing route for shaped plastic products.

          Technical specifications for 6ES7138-4DB03-0AB0

          • Product Model
            6ES7138-4DB03-0AB0
          • Product Parameters
            ET 200S SSI Interface
          • Manufacturer
            Siemens
          • Encoder connection
            1 absolute SSI encoder; RS422 differential data and clock signals
          • Encoder width
            13 to 25 bits; every integer width in this range is supported
          • Load supply
            24 V DC rated; reverse-polarity protection
          • SSI clock and cable limits
            125 kHz: 320 m; 250 kHz: 160 m; 500 kHz: 60 m; 1 MHz: 20 m; 1.5 MHz: 10 m; 2 MHz: 8 m; shielded twisted pairs, subject to shorter encoder limits
          • Encoder supply output
            L+ minus 0.8 V; maximum 500 mA total at terminals 2 and 6; short-circuit protected
          • Encoder coding
            Binary or Gray-to-binary conversion; optional odd or even parity checking
          • Encoder-value processing
            Configurable normalization, trailing-bit count and direction reversal
          • Digital input
            1 input; 0 level -30 to +5 V, 1 level +11 to +30 V; maximum 300 us delay in either direction
          • Latch function
            Standard mode only; rising, falling or both input edges; acknowledgement required to resume current encoder values
          • Comparison function
            Standard mode only; 2 loadable comparison values with results in the feedback interface, not load-switching outputs
          • Non-isochronous update rate
            Standard mode 1 ms; Fast mode 700 us; not a complete end-to-end position latency specification
          • Process-data interfaces
            Standard: 8 input and 8 output bytes; Fast: 4 input bytes
          • No-load consumption
            Maximum 10 mA from backplane and 40 mA from L+
          • Electrical isolation
            SSI function isolated from backplane; not isolated from load voltage L+
          • Terminal modules
            TM-E15S24-01 or TM-E15S26-A1
          View all additional
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          SYSTEM & REPLACEMENT CHECK

          Information needed before ordering

          Three direct checks to secure your system integration and minimize ordering risks.

          Information

          System integration Replacement check Manuals & support
          ET 200S ABSOLUTE POSITION ACQUISITION

          Match SSI timing, encoder format and operating mode

          Connect the absolute encoder through the documented RS422 data and clock pairs, using shielded twisted-pair cables with the shield supported at both ends. Select the clock rate against both the module's cable-length table and the encoder manufacturer's limits. The maximum cable distance is rate-dependent and must not be treated as one universal installation allowance.
          Choose standard mode when the application needs input-triggered position capture or comparison against loaded values. Choose Fast mode only when its reduced function set and feedback interface suit the controller program. Siemens excludes the original IM151-1AA00 execution from Fast mode, and GSD integration is documented only for non-isochronous operation.
          Set encoder width, Gray or binary coding, parity, total steps, trailing bits and direction reversal from the actual encoder specification. In free-wheeling operation, the configured monoflop time must exceed the encoder's own monoflop time. For isochronous operation, check CPU, bus and interface-module support and use the sign-of-life information to detect stale feedback.

          Features:

          • Rate-dependent cable qualification
          • Mode-specific feedback and control layout
          • Encoder-specific format and timing settings
          The Siemens 6ES7138-4DB03-0AB0 requires the documented hardware configuration, installation conditions and interface arrangement to be verified before system integration and commissioning.
          INTERCHANGEABILITY

          Verify the complete replacement identity before commissioning

          Identify the complete installed order code before selecting a spare. Siemens explicitly documents 4DB03 as a fully compatible replacement for 4DB02, 4DB01 and 4DB00. The DB03 chapter retains predecessor-labelled terminal illustrations, so those drawings must be read together with the chapter's exact-model scope rather than relabelled as a different hardware photograph.
          Retain the existing standard or Fast configuration entry and the associated process-data mapping. Preserve encoder width, parity, coding and timing parameters, then check the maintained controller program's acknowledgement logic. Standard mode requires acknowledgement of a frozen latch value and certain faults; Fast mode clears its grouped encoder or supply error indication after the cause disappears.
          After restoring the station, verify the ready state, encoder direction, input indication and diagnostic messages using the approved commissioning procedure. If station parameters are reassigned, comparison values must be reloaded and latching needs a new digital-input edge. Use the complete ET 200S station documentation alongside this technological-functions excerpt for system installation and safety requirements.

          Features:

          • Documented DB00/DB01/DB02 replacement scope
          • Encoder settings and acknowledgement logic retained
          • Post-configuration diagnostics and latch checks
          The Siemens 6ES7138-4DB03-0AB0 requires replacement verification based on its complete order number, installed hardware, signal configuration and project documentation.
          DOCUMENTATION STATUS

          Browse the Manuals, Datasheets, Official Documents, Links

          Important Notice: Official documents are provided through manufacturer links. Accessories, manuals, cables, calibration data, software, certificates, and other items are not included with this equipment unless listed in the stock item description.

          Features:

          • Exact-model manufacturer data and relevant original manual pages
          • Original terminal diagrams, configuration details and manufacturer safety context
          • Accessories and supplied documentation follow the written quotation
          Documentation for the Siemens 6ES7138-4DB03-0AB0 includes an independent technical summary and selected original manufacturer pages; check the applicable document edition against the delivered product and approved installation documentation.

          Also searched as

          6ES7132-4BF00-0AA0 6ES7193-4CE10-0AA0 6ES7132-4BD32-0AA0 6ES7131-4RD02-0AB0 6ES7153-1AA03-0XB0

          Important notice

          Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
          This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
          BUYER INFORMATION

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          • 01

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            HS reference
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          • 03

            Warranty & returns

            Warranty
            12 months from AMIKON
            Inspection
            Label, condition and packing checks
            Returns
            Prior RMA authorisation required
            Compatibility
            Confirm before order
            OEM warranty
            Does not apply
          Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.

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          FREQUENTLY ASKED QUESTIONS

          Questions buyers ask about 6ES7138-4DB03-0AB0

          Direct answers about identity, compatibility, stock, warranty, payment and shipping.

          • Is this a general RS232 or RS485 serial communications module?

            No. The 1SSI is an interface for an absolute SSI encoder. Siemens specifies RS422 differential signals for the SSI data and clock pairs. It is not the ET 200S 1SI point-to-point communications module.

          • Does Fast mode retain the latch and comparator functions?

            No. Latching and the two comparison functions are documented for standard mode only. Fast mode provides a compact feedback interface for rapid encoder-value acquisition and cannot be used with IM151 order number 6ES7151-1AA00-0AB0.

          • What cable length is permitted at 2 MHz?

            The manual allows a maximum of 8 m at 2 MHz using shielded twisted-pair wiring. The encoder may require a shorter cable. Lower clock rates permit different lengths, so the 320 m value at 125 kHz cannot be applied to a 2 MHz connection.

          • Are the comparison results physical digital outputs?

            No. The manual places both comparison results in the feedback interface. The CMP indicator shows the first comparison result; it is not evidence of a load-switching terminal. The terminal assignment provides SSI signals, encoder supply and a digital latch input.

          • How should Gray code, parity and trailing bits be configured?

            Use the actual encoder specification. Gray conversion acts on the complete encoder value, so preceding special bits and trailing bits require care. Set the encoder width, parity, normalization, trailing-bit count and total steps consistently; do not copy these settings from a different encoder.

          • Which earlier 1SSI modules can 4DB03 replace?

            The 2010 Siemens manual explicitly lists 6ES7138-4DB02-0AB0, 6ES7138-4DB01-0AB0 and 6ES7138-4DB00-0AB0 as fully compatible predecessors. Preserve the existing operating mode, encoder settings and interface mapping; this statement does not establish compatibility with every ET 200S serial module.
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