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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Quotations and system-matching guidance for 6ES7351-1AH01-0AE0 are available from Apter Power.

        6ES7351-1AH01-0AE0

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Siemens 6ES7351-1AH01-0AE0 is a SIMATIC S7-300 FM 351 positioning module that controls rapid/creep-feed drives using incremental, SSI absolute, or two-wire position feedback.
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        Ships by Wednesday, October 28
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        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.
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        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
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        Technical specifications for 6ES7351-1AH01-0AE0

        • Manufacturer:
          Siemens
        • Part Number:
          6ES7351-1AH01-0AE0
        • Product Family:
          Siemens Simatic S7-300
        • Product Type:
          FM 351 Positioning Module
        • Stock:
          1
        • Positioning Method:
          Rapid and creep-feed control
        • Digital Inputs:
          8
        • Digital Outputs:
          8
        • Feedback Devices:
          Incremental encoder, SSI absolute encoder, or two-wire sensor
        • Incremental Encoder Signals:
          5 V differential A, B, and N
        • Incremental Encoder Frequency:
          Up to 50 kHz at 25 m cable length
        • SSI Interface:
          5 V differential RS-422
        • SSI Telegram Length:
          13 or 25 bits
        • Maximum SSI Clock:
          1 MHz
        • SSI Coding:
          Gray code
        • Maximum SSI Cable Length:
          300 m at 125 kHz
        • Digital I/O Isolation:
          Galvanically isolated
        • Front Connector:
          1 x 20-pin
        • Protection Rating:
          IP20
        • Operating Temperature:
          0 to +60 °C
        • Storage and Transport Temperature:
          -40 to +70 °C
        • Weight:
          1.285 lbs (0.583 kg)
        • Estimated shipping dimensions:
          15.7x13.2x9.1cm
        • 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 Feedback Control I/O Positioning Wiring

        Features:

        • Rapid and creep-feed outputs reduce axis speed before the target position is reached.
        • Incremental, SSI absolute, and two-wire feedback options serve different position-sensing arrangements.
        • Eight isolated inputs and eight isolated outputs connect external drive and process signals.
        Siemens 6ES7351-1AH01-0AE0 performs positioning functions inside an S7-300 rack.

        The module evaluates the configured feedback and changes the drive commands at the programmed switching points.

        Positioning parameters and diagnostic state pass between the module and CPU through the backplane.

        The Siemens 6ES7351-1AH01-0AE0 FM 351 Positioning Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Siemens 6ES7351-1AH01-0AE0 FM 351 Positioning 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.

        Position Feedback Selection

        • Incremental input: Differential A, B, and N tracks provide relative position pulses.
        • SSI input: Clock and data pairs read a 13-bit or 25-bit absolute position word.
        • Two-wire input: A two-wire sensor can provide the reference required by the selected mode.
        • Configuration match: The hardware connection and parameterized feedback type must be identical.

        Isolated External Signals

        • Input group: Eight digital inputs receive enable, limit, and process conditions.
        • Output group: Eight digital outputs issue configured drive and status commands.
        • Isolation: Digital I/O is galvanically isolated from the module logic.
        • Front connection: One 20-pin connector carries the field-side signals.

        Rapid and Creep-Feed Sequence

        • Target comparison: The module compares actual position with the assigned target.
        • Rapid command: The drive runs at the faster command while the axis is far from target.
        • Creep command: The module changes to the lower speed before final positioning.
        • Completion state: Configured tolerances determine when the position is reported as reached.

        Feedback Cable Boundaries

        • Incremental limit: The permitted pulse frequency decreases as encoder cable length increases.
        • SSI length: A lower SSI clock allows the documented long cable reach.
        • Signal pairs: Differential feedback conductors must remain paired and shielded.
        • Commissioning: Polarity, reference direction, and limit inputs should be checked before axis travel.
        Description
        Siemens 6ES7351-1AH01-0AE0 is an FM 351 positioning module for the SIMATIC S7-300 system. It closes a rapid/creep-feed positioning sequence by comparing encoder feedback with a configured target and switching the drive-control outputs as the axis approaches position.

        Feedback on 6ES7351-1AH01-0AE0 can come from a 5 V differential incremental encoder, an SSI absolute encoder, or a two-wire sensor. The selected interface determines the wiring, clock or pulse limits, and cable length, so the encoder type and parameter set must agree before movement is enabled.

        Eight isolated digital inputs bring enable, limit, and process conditions into 6ES7351-1AH01-0AE0, while eight isolated outputs issue the configured drive and status commands. The single 20-pin front connector groups these signals at the module, and the S7 backplane transfers target values, parameters, and diagnostic state to the CPU.
        Alternative Names
        6ES73511AH010AE0 6ES7351 1AH01 0AE0 6ES 7351 1AH01 0AE0 Siemens 6ES7351-1AH01-0AE0 6ES7351-1AH01-0AE0 FM 351 Positioning Module 6E57351-1AH01-0AE0 6ES7351-IAH01-0AE0 6ES7351-1AHO1-0AE0
        Technical notes
        Before enabling motion with 6ES7351-1AH01-0AE0, the configured feedback type, signal format, cable limit, and front-connector assignment must all match the installed encoder.
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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.
        VIEW ALL FAQS
        Why can Siemens 6ES7351-1AH01-0AE0 count in the wrong direction after an encoder replacement?
        On Siemens 6ES7351-1AH01-0AE0, check A/B phase order or SSI direction settings, then verify that the configured direction matches mechanical travel.
        What causes an SSI position value on 6ES7351-1AH01-0AE0 to jump or remain invalid?
        For 6ES7351-1AH01-0AE0, verify 13-bit or 25-bit selection, Gray coding, clock rate, differential-pair wiring, shielding, and cable length.
        Why does 6ES7351-1AH01-0AE0 stop at the creep speed without reporting position reached?
        The 6ES7351-1AH01-0AE0 needs valid feedback, a reachable target, correct switching points, and a position tolerance that the mechanical axis can enter.
        Can Siemens 6ES7351-1AH01-0AE0 drive a servo amplifier through an analog speed reference?
        No. Siemens 6ES7351-1AH01-0AE0 uses rapid/creep digital command outputs rather than an analog servo-speed output.
        What should be backed up before replacing 6ES7351-1AH01-0AE0?
        Retain the S7 project, FM 351 parameter set, encoder selection, switching points, target data, and 20-pin wiring assignment for 6ES7351-1AH01-0AE0.
        Why can the drive outputs of Siemens 6ES7351-1AH01-0AE0 stay inactive even when a target is loaded?
        Check Siemens 6ES7351-1AH01-0AE0 enable inputs, limit states, module diagnostics, CPU command sequence, and output supply before changing positioning parameters.

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