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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Documentation, quotations, and S7-300 module matching for 6ES7323-1BH01-0AA0 are available through Apter Power.

        6ES7323-1BH01-0AA0

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        Siemens 6ES7323-1BH01-0AA0 is an isolated SIMATIC S7-300 SM 323 module combining eight 24 V DC inputs with eight 0.5 A outputs.
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        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.
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        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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        Technical specifications for 6ES7323-1BH01-0AA0

        • Manufacturer:
          Siemens
        • Part Number:
          6ES7323-1BH01-0AA0
        • Product Family:
          Siemens Simatic S7-300
        • Product Type:
          SM 323 Isolated Digital I/O Module
        • Stock:
          1
        • Digital Inputs:
          8
        • Digital Outputs:
          8
        • Load Supply:
          24 V DC; 20.4–28.8 V range
        • Input Signal 0:
          -30 to +5 V
        • Input Signal 1:
          13 to 30 V
        • Input Delay:
          1.2–4.8 ms
        • Rated Output Current:
          0.5 A per channel
        • Output Group Limit:
          4 A
        • Short-Circuit Threshold:
          Approximately 1 A
        • Front Connector:
          20-pin
        • Channel Isolation:
          Groups of 8 via optocouplers
        • Status Indication:
          Green LEDs for inputs and outputs
        • Diagnostic Alarms:
          Not provided
        • Weight:
          0.531 lbs (0.241 kg)
        • Estimated shipping dimensions:
          15.1×12.8×5cm
        • 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 Input Recognition Output Grouping Isolation Path Connector Planning

        Features:

        • 6ES7323-1BH01-0AA0 combines eight digital inputs and eight digital outputs.
        • The 24 V DC field circuits are isolated from the S7-300 backplane.
        • Green channel LEDs expose input and output states without a diagnostic alarm channel.
        The 6ES7323-1BH01-0AA0 condenses the sensing and switching sides of an SM 323 into one slot.

        A common L+ field supply serves the module while optocouplers separate its I/O groups from the backplane logic.

        The 20-pin connector, eight-output group limit and existing wire assignments must agree during module matching.

        The Siemens 6ES7323-1BH01-0AA0 SM 323 Isolated Digital I/O Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Siemens 6ES7323-1BH01-0AA0 SM 323 Isolated Digital I/O 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.

        How field voltage becomes an S7-300 logic state

        • Low state: Voltages from -30 to +5 V are interpreted as signal 0.
        • High state: The signal-1 window begins at 13 V and extends to 30 V.
        • Input current: A high input draws approximately 7 mA.
        • Transfer delay: Both transition directions pass through a 1.2–4.8 ms delay.

        Relating each channel to the shared load boundary

        • Channel rating: Each output carries a 0.5 A rated signal-1 current.
        • Group total: The eight outputs share a 4 A maximum-current boundary.
        • Protection response: Electronic short-circuit protection responds at approximately 1 A.
        • Redundant drive: Two outputs may control one load redundantly only when they belong to the same group.

        Separation between field circuits and the backplane

        • Input boundary: The input group is optically isolated from the S7-300 backplane.
        • Output boundary: The output group uses a separate optocoupler path to the backplane.
        • Test level: Isolation is tested at 500 V DC.
        • Field commonality: Channels remain organized in groups of eight rather than as individually isolated points.

        Checks at the removable field interface

        • Connector format: The module requires a 20-pin S7-300 front connector.
        • Supply placement: The L+ range is 20.4–28.8 V DC before field loads are considered.
        • Cable reach: Documented limits are 1,000 m shielded and 600 m unshielded.
        • LED use: Green indicators confirm channel state but do not replace electrical checks because diagnostics are absent.
        Description
        Within a SIMATIC S7-300 station, Siemens 6ES7323-1BH01-0AA0 is the SM 323 isolated digital module that places eight 24 V DC input points and eight 24 V DC output points in one 40 mm-wide assembly. Field states enter the controller through the input section, while the output section returns switching commands to connected loads.

        The input side of 6ES7323-1BH01-0AA0 recognizes a logical 0 from -30 to +5 V and a logical 1 from 13 to 30 V, with a typical 7 mA signal-1 current. Each transition passes through a documented 1.2–4.8 ms input delay before the backplane presents the state to the S7-300 program.

        Eight short-circuit-protected outputs on 6ES7323-1BH01-0AA0 switch loads at a 0.5 A rated current per channel. All eight share the module's output group, with a 4 A total-current boundary, and each signal-1 output remains within 0.8 V of the connected L+ supply.

        A 20-pin front connector carries the field conductors for 6ES7323-1BH01-0AA0. The input group and output group are each isolated from the S7-300 backplane by optocouplers, while green channel LEDs report input and output state without adding diagnostic alarms.
        Alternative Names
        Siemens 6ES7323-1BH01-0AA0 6ES7323 1BH01 0AA0 6ES73231BH010AA0 SM 323 6ES7323-1BH01-0AA0 S7-300 8DI 8DO SM323 6ES7323-1BH01 24 VDC I/O Siemens SM323 8 Input 8 Output SIMATIC Digital I/O 6ES7323 1BH01
        Technical notes
        Siemens 6ES7323-1BH01-0AA0 uses a 20-pin front connector and one eight-channel output group. Confirm the 4 A group limit, L+ range and existing field wiring before installation.
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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 a 40-pin SM 323 connector not be assumed for 6ES7323-1BH01-0AA0?
        6ES7323-1BH01-0AA0 is documented with a 20-pin front connector, so connector format must be checked against the complete order number.
        What input voltage should be investigated if 6ES7323-1BH01-0AA0 never sees a high state?
        6ES7323-1BH01-0AA0 recognizes signal 1 only from 13 to 30 V; a lower field voltage may remain outside the high-state window.
        How should output loading be totalled on 6ES7323-1BH01-0AA0?
        For 6ES7323-1BH01-0AA0, add the demand of all eight outputs and keep the shared group total within 4 A as well as each channel within 0.5 A rated.
        Can two outputs of 6ES7323-1BH01-0AA0 be paralleled to increase current?
        No. 6ES7323-1BH01-0AA0 does not allow parallel outputs for uprating; same-group outputs may be paired only for redundant load control.
        Why might the LEDs on 6ES7323-1BH01-0AA0 look normal while no diagnostic message appears?
        6ES7323-1BH01-0AA0 provides green state LEDs but no diagnostic function or diagnostic alarm, so wiring and load measurements remain necessary.
        Which cable-length limit applies to remote field points on 6ES7323-1BH01-0AA0?
        6ES7323-1BH01-0AA0 permits up to 1,000 m with shielded cable or 600 m with unshielded cable for its documented I/O circuits.

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