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6ES5431-4UA12

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Siemens 6ES5431-4UA12 is a SIMATIC S5 431 digital input module with sixteen isolated 24–60 V DC channels. It connects legacy field states to S5-135U and S5-155U process images with a typical 3 ms response.
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Technical specifications for 6ES5431-4UA12

  • Manufacturer:
    Siemens
  • Part Number:
    6ES5431-4UA12
  • Product Family:
    Siemens Simatic S5
  • Product Type:
    Digital Input Module
  • Stock:
    1
  • Module designation:
    431
  • I/O function:
    digital input
  • Channel capacity:
    16 inputs
  • Field electrical class:
    24–60 V DC
  • Isolation:
    16 isolated inputs
  • System bus current:
    5 V, 90 mA typical
  • Power dissipation:
    2.2–7.7 W
  • Permissible unshielded line:
    As documented in the Siemens system manual
  • Enable circuit:
    Front enable input/jumper arrangement
  • Host systems:
    SIMATIC S5-135U / S5-155U
  • Input frequency:
    100 Hz max.
  • Typical input delay:
    3 ms
  • Rated input current:
    4.5–7.5 mA
  • Shielded line length:
    1000 m max.
  • Weight:
    1.056 lbs (0.479 kg)
  • Estimated shipping dimensions:
    26.0 x 21.2 x 3.4 cm
  • Tariff Code:
    8537101190
  • 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 Applications Programming Safety Efficiency

Features:

  • Receives sixteen isolated digital inputs in the 24–60 V DC class.
  • Supports S5-135U and S5-155U rack installations.
  • Provides a typical 3 ms input delay for established discrete signals.
The 4UA12 suffix identifies the voltage and isolation execution of the 431 module. A neighboring 431 order code can use different electrical limits or front-connector assignments.

Its purpose is to translate sixteen external switch states into the binary process image read by the legacy S5 control program.

Archive the rack address and label every front-connector wire before removal. Recheck the enable path and field voltage with the connector unplugged before energizing a spare.

6ES5431-4UA12 is sourced as the isolated 24–60 V input execution for the documented S5 rack.
Verified resources for Siemens 6ES5431-4UA12: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.
  • Read isolated limit switches and interlocks carrying higher DC control voltages.
  • Preserve sixteen discrete machine inputs during maintenance of an S5-135U station.
  • Interface legacy 24–60 V devices with the S5-155U binary process image.
  • Assign the sixteen input bits to the same process-image addresses used by the S5 program.
  • Trace interlock and alarm references before changing the module or rack configuration.
  • Force testing should follow the approved program procedure with outputs held in a safe state.
  • Measure the field voltage on every conductor because the module accepts a broad 24–60 V DC class.
  • Do not plug or unplug the front connector while energized field sources remain present.
  • Preserve isolation between channels when routing commons and test equipment.
  • Sixteen inputs occupy a 20 mm module width in the S5 rack.
  • Typical 5 V backplane demand is 90 mA and belongs in the rack power calculation.
  • Power dissipation varies with the energized input population and field voltage.
Description
6ES5431-4UA12 is the narrow SIMATIC S5 431 input board designed for sixteen isolated DC signals in the 24–60 V class. Each field point is brought through the 42-pin front connection, while the module presents the resulting logic states to an S5-135U or S5-155U system through the backplane.

The documented input behavior includes a typical 3 ms delay, up to 100 Hz input frequency and a rated current from 4.5 to 7.5 mA. These characteristics make the board suitable for established sensors, switches and interlock contacts whose voltage and switching rate were engineered around this specific S5 input type.

Because the channels are individually isolated, conductor references and the front enable arrangement must be transferred exactly rather than treated as one shared common group. Before replacement, record the terminal numbers, field voltages, rack address and jumper state, then perform a point-by-point test against the original process-image map.
Alternative Names
6ES5431-4UA12 6ES5431 4UA12 6ES54314UA12 Siemens 6ES5431-4UA12 6ES5431-4UA12 SIMATIC S5-135U/155U Digital I/O Siemens Digital Input Module 6ES5431-4UA12 Digital Input Module
Technical notes
6ES5431-4UA12 accepts field levels up to the 60 V DC class; confirm each conductor voltage and the enable circuit before seating the 42-pin connector to avoid exposing channels to the wrong potential.
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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.
Why are the sixteen channels of Siemens 6ES5431-4UA12 described as isolated?
Their field inputs are separated in the documented module arrangement, allowing unlike DC references within the specified insulation limits.
What switching behavior can Siemens 6ES5431-4UA12 follow?
The official data gives a typical 3 ms delay and a maximum input frequency of 100 Hz.
How much current does a high signal draw on Siemens 6ES5431-4UA12?
The rated input-current range is 4.5–7.5 mA for the documented 24–60 V DC field class.
Which connector record protects Siemens 6ES5431-4UA12 replacement work?
A terminal-by-terminal schedule for the 42-pin front connector preserves channel identity and isolated field references.
How far may a shielded input line run to Siemens 6ES5431-4UA12?
The Siemens documentation states a maximum shielded line length of 1000 m under the specified installation conditions.
What S5 systems host Siemens 6ES5431-4UA12?
The module is documented for SIMATIC S5-135U and S5-155U hardware environments.

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