• Please try to be as accurate as possible with your search.
  • We can quote you on 1000s of specialist parts, even if they are not listed on our website.
  • We can't find any results for “”.
    SEE MORE
      SEE PRODUCTS IN SEARCH PAGE ()
      info@apterpower.com
      +86 181 0690 9650
      Request a

      Fast Quote

      Manufacturers
      ALL MANUFACTURERS
      • Please try to be as accurate as possible with your search.
      • We can quote you on 1000s of specialist parts, even if they are not listed on our website.
      • We can't find any results for “”.
        Manufacturers
        info@apterpower.com +86 181 0690 9650
        Choose a manufacturer
        ALL MANUFACTURERS
        Ask our team:
        • Phone: +86 181 0690 9650
        • E-Mail info@apterpower.com

        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power offers 6ES7338-4BC01-0AB0 quotations, product manuals and encoder-module selection support.

        6ES7338-4BC01-0AB0

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Siemens 6ES7338-4BC01-0AB0 is a SIMATIC S7-300 SM 338 position decoder module that reads absolute position values from SSI encoders.
        In Stock
        Ships by Saturday, October 17
        Fast Shipping Available
        Get a quick price for 6ES7338-4BC01-0AB0
        Quantity
        *E-mail
        Company
        *Mobile
        *Content
        Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)
        Get a Quote
        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
        Shipping Mode
        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 6ES7338-4BC01-0AB0

        • Manufacturer:
          Siemens
        • Part Number:
          6ES7338-4BC01-0AB0
        • Product Family:
          Siemens Simatic S7-300
        • Product Type:
          SM 338 SSI Position Decoder Module
        • Stock:
          1
        • Encoder Channels:
          3 absolute SSI inputs
        • SSI Frame Length:
          13, 21 or 25 bits
        • Encoder Coding:
          Gray or binary
        • SSI Clock Rate:
          125, 250, 500 kHz or 1 MHz
        • Freeze Inputs:
          2 digital inputs
        • Supply Voltage:
          24 V DC; 20.4–28.8 V DC
        • Encoder Supply:
          L+ minus 0.8 V; 900 mA maximum
        • Backplane Current:
          160 mA maximum
        • Power Dissipation:
          3 W typical
        • DI Signal Levels:
          0: -3 to +5 V; 1: +11 to +30.2 V
        • DI Repetition Frequency:
          1 kHz maximum
        • CPU Isolation:
          No galvanic isolation
        • Reverse-Polarity Protection:
          Not provided
        • Front Connector:
          20-pole
        • Weight:
          0.5467 lbs (0.248 kg)
        • Estimated shipping dimensions:
          15.2×12.8×5cm
        • Tariff Code:
          85389091
        • 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 Encoder Wiring Parameter Transfer Fault Reporting Firmware

        Features:

        • Each encoder channel can be enabled separately.
        • Diagnostic interrupts can be enabled during parameter assignment.
        • The digital-input states have separate green status indicators.
        The input data of 6ES7338-4BC01-0AB0 places the three channel values at separate double-word offsets. This arrangement keeps the encoder values distinct even when one trigger is assigned to several channels.

        A standard-mode value on 6ES7338-4BC01-0AB0 carries its freeze indication in the highest bit. The position field and capture indication therefore have different meanings within the same returned double word.

        Fast mode changes the checkback layout of 6ES7338-4BC01-0AB0 to include readiness, parameter-error and group-fault information. A program reading that mode must use the corresponding data layout.

        The Siemens 6ES7338-4BC01-0AB0 SM 338 SSI Position Decoder Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Siemens 6ES7338-4BC01-0AB0 SM 338 SSI Position Decoder 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.

        Keep the encoder reference and cable shield distinct

        • Ground reference: The encoder supply ground is connected to CPU ground; terminal M needs a low-impedance connection to that reference.
        • Differential pairs: SSI clock and data use separate twisted pairs rather than a shared single-ended signal wire.
        • Cable shield: The encoder cable shield is applied at both ends using the specified shielding arrangement.
        • Supply conductors: The encoder supply terminals and the differential signal terminals perform separate wiring functions.

        Apply acquisition settings through the CPU configuration

        • Engineering state: Module parameters are assigned with the CPU in STOP.
        • Transfer point: The CPU transfers the configured parameters to the module during the STOP-to-RUN transition.
        • Runtime access: The user program does not change these module parameters during operation.
        • Channel selection: An encoder input configured as absent is switched off instead of being interpreted as an active encoder.

        Separate fault indication from an interrupt request

        • SF indicator: The red group-fault indicator reports module faults and also lights during the startup self-test.
        • Diagnostic records: Diagnostic information is generated independently of whether diagnostic interrupts have been enabled.
        • CPU notification: With interrupts enabled, an arriving or departing diagnostic event calls OB82 in the CPU.
        • Program evaluation: The diagnostic data can be read from the interrupt program using the supported system functions.

        Preserve the version conditions of fast acquisition

        • Feature threshold: Fast mode requires SM 338 firmware V2.0.0 or later and STEP 7 V5.3 SP2 or later.
        • Update route: Firmware updating is performed through the hardware configuration environment.
        • Distributed station: An update in a distributed installation requires the interface module to support the necessary system services.
        • Interrupted update: A disrupted update leaves the module nonfunctional until firmware has been transferred successfully.
        Description
        Siemens 6ES7338-4BC01-0AB0 brings absolute encoder positions into a SIMATIC S7-300 controller through the SM 338 POS-INPUT signal module. Each SSI channel receives a serial position frame from its encoder, and the controller program processes the resulting position value.

        Before the values reach the program, 6ES7338-4BC01-0AB0 interprets the configured frame length and coding. Gray-coded frames are converted to binary, while normalization right-justifies the position information and removes configured trailing bits; these settings must reflect the encoder data format.

        Acquisition timing on 6ES7338-4BC01-0AB0 can run independently of the controller cycle or follow isochronous operation. Free-running acquisition repeats after the encoder monoflop interval, whereas synchronized acquisition is coordinated with the equidistant PROFIBUS DP cycle and requires a synchronous CPU, DP master and interface module.

        A rising edge at a configured freeze input captures the selected encoder values on 6ES7338-4BC01-0AB0. The captured value remains held until the control program acknowledges it, after which the freeze indication is cleared and a further capture can be accepted; this handshake belongs to standard mode rather than fast mode.
        Alternative Names
        6ES73384BC010AB0 6ES7338 4BC01 0AB0 6ES7 338-4BC01-0AB0 Siemens 6ES7338-4BC01-0AB0 6ES7338-4BC01-0AB0 SM 338 SSI Position Decoder Module 6ES7338-4BCO1-OABO 6ES7338-4BC0I-0AB0 SM 338 SSI Position Decoder Module 6ES7338-4BC01-0AB0
        Technical notes
        Siemens 6ES7338-4BC01-0AB0 provides a position value for each SSI channel; the selected operating mode determines acquisition timing and the available checkback information.
        Exceptional Service

        Our Mission

        • 100% Satisfaction

          We believe expertise is priceless. With over 20 years of experience, and top engineers on staff, we can help you solve or avoid problems that threaten your business.

        • Trust Guaranteed

          Not only do we have a vast inventory, our team makes sure every piece of equipment is in working condition. Your purchases are also backed by our Warranty.

        • Expertise

          Time is money, especially when your equipment is down. We work quickly to get your equipment on its way so you can get it back up and running.

        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.
        VIEW ALL FAQS
        Can leading status bits in an encoder frame change the position decoded by 6ES7338-4BC01-0AB0?
        Gray conversion in 6ES7338-4BC01-0AB0 covers the complete configured frame. Special bits ahead of the position bits can therefore affect the converted result and must be checked against the encoder format.
        Why is freeze capture unavailable after fast mode is enabled on 6ES7338-4BC01-0AB0?
        Freeze is a standard-mode function of 6ES7338-4BC01-0AB0; the faster acquisition mode does not provide it. A capture-dependent program cannot retain that function simply by reusing its former input assignment.
        Does selecting a faster SSI clock on 6ES7338-4BC01-0AB0 leave the permitted cable run unchanged?
        Raising the SSI clock on 6ES7338-4BC01-0AB0 reduces the cable limit: the shielded twisted-pair limits range from 320 m at 125 kHz to 20 m at 1 MHz. The installed run must be checked before changing the clock.
        How should an encoder monoflop time be matched to 6ES7338-4BC01-0AB0?
        To accommodate the encoder, the configured interval on 6ES7338-4BC01-0AB0 must be greater than its monoflop time. It is not sufficient to match only the SSI frame length and clock rate.
        When do encoders connected to 6ES7338-4BC01-0AB0 require a separate supply?
        An external supply is required when their combined demand exceeds the encoder-supply output rating of 6ES7338-4BC01-0AB0. The available current is shared rather than provided in full to each channel.

        You May Also Like

        Product Browsing History