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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power assists 7MH4601-1AA01 quotations, manuals, scale-data review, and exact-module matching.

        7MH4601-1AA01

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Used for one load-cell scale, Siemens 7MH4601-1AA01 is a SIWAREX U weighing module that converts the bridge signal into SIMATIC weight data.
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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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        Technical specifications for 7MH4601-1AA01

        • Manufacturer:
          Siemens
        • Part Number:
          7MH4601-1AA01
        • Product Family:
          Siemens Simatic S7-300
        • Product Type:
          SIWAREX U Single-Channel Weighing Electronics Module
        • Stock:
          1
        • Weighing Channels:
          1
        • Accuracy Class:
          0.05%
        • Measurement Update:
          20 ms
        • Internal Resolution:
          16 bit
        • Load-Cell Measuring Ranges:
          0 to 1, 2 or 4 mV/V
        • Load-Cell Excitation:
          10.3 V typical
        • Maximum Load-Cell Supply Current:
          240 mA
        • Maximum Load-Cell Cable Length:
          1000 m
        • Rated Supply Voltage:
          24 V DC
        • Static Supply Range:
          20.4 to 28.8 V DC
        • Maximum Current Consumption:
          220 mA
        • Typical Power Loss:
          4.8 W
        • Backplane Current:
          100 mA
        • Service Interface:
          RS232, 9600 bit/s, maximum 15 m
        • Remote Display Interface:
          TTY, 9600 bit/s, maximum 1000 m
        • Parameter Storage:
          EEPROM
        • EEPROM Data Retention:
          100 years
        • EEPROM Write Cycles:
          100000
        • Protection Rating:
          IP20 in rack; IP10 without rack
        • Operating Temperature:
          0 to 60 °C horizontal; 0 to 40 °C vertical
        • Weight:
          0.7165 lbs (0.325 kg)
        • Estimated shipping dimensions:
          4x12.5x13cm
        • Tariff Code:
          84239000
        • 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 Load-Cell Path Calibration Record Service Interfaces Scale Diagnosis

        Features:

        • One weighing channel supplies and reads a connected load-cell scale.
        • The S7 backplane carries weight data while RS232 and TTY serve service and display tasks.
        • EEPROM retains parameters, but the complete calibration record remains essential for replacement.
        Bridge excitation and the differential load-cell signal form the measuring circuit.

        The converter updates the weight value and transfers it into the SIMATIC data path.

        Calibration, wiring, addresses, and scale mechanics are verified together with known loads.

        The Siemens 7MH4601-1AA01 SIWAREX U Weighing Module may remain available for quotation and support beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Siemens 7MH4601-1AA01 SIWAREX U Weighing 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.

        Turning bridge output into controller weight data

        • Excitation: The module supplies the connected load-cell bridge.
        • Measurement: The differential millivolt-per-volt signal returns through the shielded scale cable.
        • Conversion: A 16-bit path updates the measured value every 20 ms.
        • Controller transfer: The weight value and status move through the S7 backplane.

        Linking scale mechanics to electronic parameters

        • Characteristic value: The load-cell mV/V rating matches the selected measuring range.
        • Zero point: The empty scale establishes the reference before span calibration.
        • Span: A known test load ties the raw measurement to engineering units.
        • Archive: SIWATOOL parameters and acceptance results remain with the exact scale.

        Separating controller, engineering and display connections

        • Backplane: SIMATIC data exchange serves the PLC program.
        • RS232: A nearby SIWATOOL PC performs parameter and diagnostic work.
        • TTY: A remote display receives weight values over the current-loop path.
        • Cable limits: Each interface remains within its documented distance and wiring boundary.

        Tracing a weighing error from mechanics to data

        • Mechanical check: The load platform moves freely and applies force evenly to the load cells.
        • Bridge check: Excitation, signal, shield, and junction-box connections remain intact.
        • Parameter check: Range, filter, zero, span, and calibration values match the approved record.
        • PLC check: Backplane address, status bits, and program interpretation agree with the module data.
        Description
        Built for one scale in a SIMATIC station, Siemens 7MH4601-1AA01 serves as the single-channel SIWAREX U weighing electronics module. It excites the load-cell bridge, converts the millivolt-per-volt signal, and transfers the resulting weight value to the S7-300 or ET 200M controller over the backplane.

        At the field side, 7MH4601-1AA01 supplies the connected load cells and receives their differential measuring signal through the shielded scale cable. The selected 1, 2, or 4 mV/V range and the scale characteristic determine how the 16-bit conversion path represents the mechanical load.

        Communication around 7MH4601-1AA01 is divided by purpose: the S7 backplane carries cyclic control data, RS232 connects a service PC running SIWATOOL, and the TTY path serves a remote weight display. This separation lets commissioning parameters and local indication operate without replacing the controller data path.

        Calibration and operating parameters in 7MH4601-1AA01 remain in EEPROM, but a replacement module still needs the approved scale settings. Load-cell capacity, characteristic value, zero point, span, cable arrangement, filter settings, and controller addresses must be restored and checked with known weights.
        Alternative Names
        7MH46011AA01 7MH4 601-1AA01 7MH4601 1AA01 Siemens 7MH4601-1AA01 7MH4601-1AA01 SIWAREX U SIWAREX U 7MH4601-1AA01 7MH 4601 1AA01 7MH4601/1AA01
        Technical notes
        With Siemens 7MH4601-1AA01, preserve load-cell wiring, scale characteristic values, calibration weights, S7 addresses, and the SIWATOOL parameter archive as one scale record.
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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 does Siemens 7MH4601-1AA01 show a stable but incorrect weight?
        Check Siemens 7MH4601-1AA01 zero and span calibration, load-cell characteristic value, measuring range, mechanical loading, junction box, and controller scaling against the approved scale record.
        What should be backed up before replacing 7MH4601-1AA01?
        Back up the 7MH4601-1AA01 SIWATOOL parameters, calibration values, load-cell data, filter settings, S7 addresses, scale name, and known-weight test results.
        Can Siemens 7MH4601-1AA01 connect directly to a remote display?
        Yes. Siemens 7MH4601-1AA01 has a TTY interface for a compatible remote display, while RS232 is reserved for the service PC path.
        How is a load-cell wiring fault separated from a controller fault on 7MH4601-1AA01?
        Measure the 7MH4601-1AA01 excitation and bridge signal, inspect shields and junctions, review module status, then compare the raw SIWAREX value with the S7 data.
        Which weighing range should be selected on Siemens 7MH4601-1AA01?
        Choose the Siemens 7MH4601-1AA01 range that covers the connected load cells’ combined mV/V signal at full scale, then calibrate zero and span with the installed mechanics.

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