• 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
          Manuals, quotations, and SIWAREX configuration matching for 7MH4900-2AA01 are available from Apter Power.

        7MH4900-2AA01

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Siemens 7MH4900-2AA01 is a SIWAREX FTA single-channel legal-for-trade weighing module for S7-300 and ET 200M systems that processes load-cell signals and controls automatic weighing sequences.
        In Stock
        Ships by Saturday, October 17
        Fast Shipping Available
        Get a quick price for 7MH4900-2AA01
        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 7MH4900-2AA01

        • Manufacturer:
          Siemens
        • Part Number:
          7MH4900-2AA01
        • Product Family:
          Siemens Simatic S7-300
        • Product Type:
          SIWAREX FTA Single-Channel Legal-for-Trade Weighing Module
        • Stock:
          1
        • Weighing Channels:
          1
        • Load-Cell Input:
          Full bridge, 1–4mV/V
        • Internal Resolution:
          16 million divisions
        • Certified Accuracy:
          3x6000d, class III
        • Internal / External Refresh:
          2.5ms / 10ms
        • Digital Inputs:
          7, isolated
        • Counter Inputs:
          1, up to 10kHz
        • Digital Outputs:
          8, isolated
        • Output Current:
          0.5A rated per output; 2A total
        • Analog Output:
          0–20mA or 4–20mA
        • Analog Resolution:
          12 bit
        • RS232 Rate:
          1200–115200baud
        • RS485 Rate:
          1200–19200baud
        • Rated Supply:
          24V DC
        • Permissible Static Supply:
          20.4–28.8V DC
        • Maximum Current Consumption:
          500mA
        • Typical Power Loss:
          7.5W
        • S7-300 Backplane Current:
          55mA typical
        • Module Dimensions:
          80x125x130mm
        • Maximum Calibratable Load-Cell Distance:
          500m
        • Weight:
          1.323 lbs (0.6 kg)
        • Estimated shipping dimensions:
          13.4x15.4x8.9cm
        • 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 Signal Chain Sequence Outputs Serial Service Weighing Uses

        Features:

        • One high-resolution bridge-input channel feeds legal-for-trade and process weighing functions.
        • Discrete I/O and the analog output translate weight conditions into sequence-control signals.
        • RS232 and RS485 divide service access from remote-display or digital-load-cell communication.
        Siemens 7MH4900-2AA01 places SIWAREX FTA weighing electronics inside an S7-300 or ET 200M station.

        The module changes the connected bridge signal into gross, net, tare, setpoint, and status data used by the configured scale sequence.

        Inputs, outputs, and serial ports let 7MH4900-2AA01 exchange those weighing results with field devices, the automation program, and commissioning tools.

        The Siemens 7MH4900-2AA01 SIWAREX FTA Weighing Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Siemens 7MH4900-2AA01 SIWAREX FTA 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.

        From the bridge circuit to a process weight

        • Bridge excitation: The module supplies the connected load cell and reads its differential millivolt-per-volt signal.
        • Sense conductors: A six-wire connection returns the actual excitation level so cable loss can be included in the measurement path.
        • Conversion: The measured bridge value is resolved internally and filtered before it becomes gross, net, or tare data.
        • Scale records: Adjustment and operating data sets define ranges, zero, tare, limits, and the selected weighing procedure.

        How the weight result controls external signals

        • Input commands: Seven isolated inputs can initiate the weighing steps assigned in the module configuration.
        • Coarse and fine control: Digital outputs can switch the configured feed stages around the calculated shut-off points.
        • Limit response: Output definitions can follow weighing limits, tolerance zones, or operating status.
        • Current representation: The analog output maps a selected weight source into the chosen 0–20 mA or 4–20 mA range.

        Different serial ports serve different equipment

        • RS232 service: A PC running SIWATOOL FTA uses the point-to-point port for parameterization and diagnostics.
        • RS485 display: The multidrop interface can transmit the selected weight value to a compatible remote display.
        • Digital load cells: Supported RS485 sensors require the documented device type, baud rate, parity, and frame.
        • Isolation: The serial paths are electrically separated from the weighing and control connections.

        Officially defined scale functions

        • Dosing: The FTA sequence controls coarse and fine feed around a stored set weight.
        • Filling: Input commands and output stages coordinate automatic filling or bagging cycles.
        • Checkweighing: The measured net value is evaluated against configured upper and lower tolerances.
        • Totalizing: Accepted weighing results can be accumulated within the defined operating mode.
        Description
        Siemens 7MH4900-2AA01 is the SIWAREX FTA single-channel weighing module for SIMATIC S7-300 and ET 200M stations. It converts a connected full-bridge load-cell signal and supplies the weight data and sequence control needed by automatic or non-automatic weighing functions.

        At the measurement entrance, 7MH4900-2AA01 supplies and monitors the load cell, accepts the 1 to 4 mV/V bridge signal, and resolves the conversion internally into 16 million divisions. Four-wire and six-wire connections are supported, while sense-line monitoring and configurable filtering define how the physical bridge signal becomes a stable weight value.

        Seven isolated digital inputs, one 10 kHz counter input, eight isolated digital outputs, and one current output surround the weighing core of 7MH4900-2AA01. The inputs can trigger configured weighing steps, the outputs drive the coarse, fine, limit, or status functions assigned in the module data, and the analog channel reproduces a selected weight value as 0–20 mA or 4–20 mA.

        Serial communication is divided by purpose on 7MH4900-2AA01. The RS232 port links a PC running SIWATOOL FTA or a printer, while RS485 can connect a remote weight display or a supported digital load cell; the baud rate, character frame, and connected device type must agree with the selected serial role.

        A separate 24 V DC connector powers the field-side functions of 7MH4900-2AA01, and the S7-300 backplane supplies the module interface. Legal-for-trade configurations retain their own verification and logging requirements, and the documented local laws apply wherever the module is used for verified weighing.
        Alternative Names
        7MH49002AA01 7MH4900 2AA01 7MH 4900-2AA01 Siemens 7MH49002AA01 SIWAREX FTA 7MH4900-2AA01 Siemens SIWAREX FTA Weighing Module S7-300 FTA 7MH4900-2AA01 7MH49OO-2AAO1
        Technical notes
        Siemens 7MH4900-2AA01 converts one load-cell channel while coordinating discrete sequence signals, current output, serial service access, and legal-for-trade weighing data.
        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
        Why might 7MH4900-2AA01 show an unstable value even when the automation program is running?
        For 7MH4900-2AA01, check bridge wiring, shield and potential equalization, sense conductors, load-cell range, mechanical movement, and the configured low-pass or averaging filter.
        Which port should be used to commission 7MH4900-2AA01 with SIWATOOL FTA?
        The RS232 interface on 7MH4900-2AA01 is the documented PC service path; RS485 is assigned to supported remote displays or digital load cells.
        How should a line-break message from 7MH4900-2AA01 be investigated?
        Trace the 7MH4900-2AA01 excitation, signal, and sense conductors through the terminal assignment, then verify bridge resistance and connector continuity before changing scale data.
        Why does 7MH4900-2AA01 need both 24 V and an S7 backplane connection?
        The external 24 V source powers the field-side weighing and I/O circuits of 7MH4900-2AA01, while the backplane connection supplies and exchanges data with the SIMATIC station.
        Can 7MH4900-2AA01 use a digital load cell without changing its serial setup?
        No. 7MH4900-2AA01 requires the correct digital-load-cell type and matching RS485 baud rate, parity, data bits, and stop bits for the selected sensor.
        What must be retained when a verified scale using 7MH4900-2AA01 is reconfigured?
        Keep the 7MH4900-2AA01 adjustment data, verification parameters, scale records, log requirements, and country-specific legal-for-trade conditions aligned with the approved installation.

        You May Also Like

        Product Browsing History