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7MH4980-2AA01

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Siemens 7MH4980-2AA01 is a two-channel S7-1500 weighing module that converts analog load-cell signals into scale values for two platform or hopper scales.
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Technical specifications for 7MH4980-2AA01

  • Manufacturer:
    Siemens
  • Part Number:
    7MH4980-2AA01
  • Product Family:
    Siemens Simatic S7-1500
  • Product Type:
    TM SIWAREX WP522 ST Two-Channel Weighing Module
  • Stock:
    1
  • Firmware Version:
    V1.0.0; firmware update supported
  • Engineering Software:
    STEP 7 TIA Portal V14 or higher
  • Mounting:
    S7-1500 mounting rail
  • Supply Voltage:
    19.2 to 28.8 V DC
  • Backplane Bus Power:
    0.55 W
  • Typical Power Loss:
    3.9 W
  • Address Space:
    64-byte inputs and 64-byte outputs
  • Digital Inputs:
    6 total; 3 per channel
  • Digital Outputs:
    8 total; 4 per channel, 0.5 A maximum each
  • Load-Cell Connections:
    2 full-bridge inputs; 4- or 6-conductor wiring
  • Full-Bridge Resistance:
    40 to 4,100 Ω
  • RS485 Interfaces:
    1
  • Ethernet Interface:
    1 RJ45 port; 10/100 Mbit/s
  • Sampling Rate:
    100 Hz
  • Input Signal Resolution:
    ±1,000,000 parts per mV/V
  • Measuring Ranges:
    −1 to +1, −2 to +2, and −4 to +4 mV/V
  • Maximum Load-Cell Cable Length:
    800 m with SIWAREX 7MH4702-8AG cable
  • Protection Rating:
    IP20
  • Operating Temperature:
    0 to 60 °C horizontal; 0 to 40 °C vertical
  • Isolation Type Test:
    707 V DC
  • Weight:
    0.441 lbs (0.2 kg)
  • Estimated shipping dimensions:
    3.9x19x16.3cm
  • 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 Weighing Channels Channel I/O Communications Commissioning

Features:

  • Two independent weighing channels connect full-bridge load cells for two platform or hopper scales.
  • The module provides six digital inputs, eight digital outputs, one RS485 interface, and one RJ45 Ethernet port.
  • SIMATIC S7-1500 backplane integration reserves 64-byte input and 64-byte output address areas.
The dual-channel design reduces cabinet space when two nearby weighing points require independent calibration and operation.

A 100 Hz sampling rate and ±1,000,000-parts-per-mV/V input signal resolution support stable weight acquisition for non-automatic scales.

STEP 7 TIA Portal V14 or higher supports engineering of the module on an S7-1500 mounting rail.

The Siemens 7MH4980-2AA01 TM SIWAREX WP522 ST Two-Channel Weighing Module is supported with product documentation and selection assistance from Apter Power.
Siemens 7MH4980-2AA01 Two-Channel 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.

Independent Scale Processing

  • Dual architecture: Two full-bridge load-cell inputs process separate platform or hopper scale signals in one technology module.
  • Wiring: Each full-bridge input supports 4- or 6-conductor load-cell connections.
  • Measuring ranges: Selectable ranges are −1 to +1, −2 to +2, and −4 to +4 mV/V.
  • Sampling: Both weighing channels operate at a 100 Hz sampling rate.

Scale Commands and Status Wiring

  • Inputs: Six digital inputs are provided in total, with three assigned to each weighing channel.
  • Outputs: Eight digital outputs are provided in total, with four assigned to each weighing channel.
  • Output rating: Each digital output supports a maximum current of 0.5 A.
  • Fault protection: Short-circuit protection limits the effect of a field-output wiring fault.

Controller and Service Access

  • S7-1500 path: The backplane transfers weight values, commands, and status data through 64-byte input and output address areas.
  • Ethernet: One RJ45 interface supports 10/100 Mbit/s network communication.
  • Serial interface: One RS485 interface is provided for supported serial communication.
  • Engineering: STEP 7 TIA Portal V14 or higher is specified for module configuration.

Scale Setup Boundaries

  • Load-cell check: Confirm bridge sensitivity, wiring polarity, excitation, and total cell loading before calibration.
  • Zero calibration: Establish the unloaded reference after the mechanical scale is stable and free of binding.
  • Span calibration: Use a known reference load or the documented theoretical method for the connected scale.
  • Channel proof: Test inputs, outputs, weight direction, and fault reactions independently on both channels.
Description
Siemens 7MH4980-2AA01 is the TM SIWAREX WP522 ST two-channel weighing technology module for SIMATIC S7-1500. Its two full-bridge load-cell inputs support 4- or 6-conductor wiring and measuring ranges of −1 to +1, −2 to +2, or −4 to +4 mV/V.

For signal handling, 7MH4980-2AA01 provides six digital inputs and eight digital outputs in total, divided as three inputs and four outputs per weighing channel. Each output is rated up to 0.5 A.

The module samples at 100 Hz with input signal resolution of ±1,000,000 parts per mV/V. It also reserves 64 bytes of input and 64 bytes of output address space in the controller.

7MH4980-2AA01 provides one RS485 interface and one RJ45 Ethernet interface operating at 10/100 Mbit/s. Engineering requires STEP 7 TIA Portal V14 or higher, and the module mounts on an S7-1500 mounting rail.
Alternative Names
7MH4980-2AA01 WP522 ST 7MH4980-2AA01 WP522ST 7MH4980-2AA01 7MH49802AA01 Siemens WP522 ST SIWAREX WP522 ST TM SIWAREX WP522 ST WP522 ST two-channel weighing module
Technical notes
Built for two independent weighing points, Siemens 7MH4980-2AA01 combines full-bridge inputs, channel-specific digital I/O, one RS485 interface, and 10/100 Mbit/s Ethernet.
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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.
Can 7MH4980-2AA01 calibrate two scales with different capacities?
Yes. 7MH4980-2AA01 keeps separate channel parameters, so each connected scale can use its own zero, span, and load-cell configuration.
What should be checked when 7MH4980-2AA01 shows an unstable zero value?
For 7MH4980-2AA01, inspect load-cell polarity, shield bonding, mechanical binding, excitation wiring, and the selected filter before recalibrating.
How are external scale commands wired to Siemens 7MH4980-2AA01?
Siemens 7MH4980-2AA01 provides three 24 V DC inputs per channel that can be assigned to supported weighing commands.
When should Ethernet be used instead of RS485 on 7MH4980-2AA01?
Use the 10/100 Mbit/s Ethernet port on 7MH4980-2AA01 for network access; the module provides one RS485 interface for supported serial communication.
What load-cell output range must match 7MH4980-2AA01?
7MH4980-2AA01 provides selectable measuring ranges of −1 to +1, −2 to +2, and −4 to +4 mV/V.
How can both channels of 7MH4980-2AA01 be proven before production?
Test 7MH4980-2AA01 with known loads on each scale, then verify channel-specific inputs, outputs, alarms, and controller values.