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        6ES5434-4UA12

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Siemens 6ES5434-4UA12 is a SIMATIC S5 434 low-voltage input module for floating 5/15 V DC field signals. It provides a discrete interface for compatible logic and switch sources.
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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 6ES5434-4UA12

        • Manufacturer:
          Siemens
        • Part Number:
          6ES5434-4UA12
        • Product Family:
          Siemens Simatic S5
        • Product Type:
          SIMATIC S5 434 digital input module
        • Stock:
          1
        • LH+ rated supply:
          5 to 15 V DC
        • L+ rated supply for NAMUR:
          12 to 24 V DC
        • Number of inputs:
          32
        • Isolation:
          Yes, 1 group of 32 inputs
        • TTL logic 0:
          0 to 0.8 V
        • TTL logic 1:
          2.4 to 5.0 V
        • CMOS logic 0:
          0 to 0.3 x LH+
        • CMOS logic 1:
          0.7 x LH+ to 1 x LH+
        • NAMUR logic 0:
          1.2 mA max.
        • NAMUR logic 1:
          2.1 mA min.
        • Internal resistance:
          1 kohm typical
        • Line resistance:
          50 ohm max.
        • Input frequency:
          100 Hz max.
        • Input delay:
          3 ms typical (1.4 to 5 ms)
        • Coincidence factor:
          100%
        • Max line length, TTL/CMOS:
          200 m
        • Max line length, NAMUR:
          600 m
        • L+/L- current consumption:
          100 mA each
        • LH+/LH- current consumption:
          150 mA each at 15 V
        • Power dissipation:
          5.5 W
        • Weight:
          0.99 lbs (0.45 kg)
        • Estimated shipping dimensions:
          20 mm x 255 mm x 195 mm
        • 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 Applications Protection Operating Environment Certifications & Standards

        Features:

        • Thirty-two floating inputs accept low-voltage DC signals.
        • TTL, CMOS, and NAMUR sensors can be connected to the 434 input design.
        • The compact card supports high-density discrete sensing in S5 panels.
        The UA12 module combines a 5 to 15 V DC supply option with its input-level and timing behavior.

        It brings logic, sensor, and switch states into one 434 input position for legacy sequence control.

        Confirm the sensor standard, front-connector wiring, line resistance, and rack address before powering the circuit.

        Availability is checked against the 434 low-voltage input family and traceable stock sources.
        Product resources for Siemens 6ES5434-4UA12:
        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.
        • e switches and lMonitors low-voltage switches and logic devices in S5 panels.
        • Collects discrete feedback from compatible 5 V or 15 V DC sources.
        • Supports service work where the installed 434 slot and wiring stay unchanged.
        • The input design supports TTL, CMOS, and NAMUR signal conventions but is not intrinsically safe.
        • Keep the field-loop resistance within the documented limit so the logic thresholds remain valid.
        • The enable input and signal returns must be isolated from hazardous-energy circuits during service work.
        • Use the module in a covered S5 rack with the specified humidity and no condensation.
        • The 5 to 15 V logic supply and 12 to 24 V NAMUR supply must remain inside their respective field interfaces.
        • Apply the system vibration and altitude limits when mounting the rack in process equipment.
        • The NAMUR input behavior follows the EN 50227 current thresholds documented for this module.
        • VDE insulation testing covers the group-to-earth path used by the mixed logic interface.
        • The module provides a conventional S5 digital interface and does not replace certified intrinsic-safety barriers.
        Description
        Siemens 6ES5434-4UA12 is a 32-input low-voltage interface for 5/15 V DC sensing, with TTL, CMOS, and NAMUR connection behavior. It concentrates logic-level feedback in one compact 434 position.

        The module can collect sensor and switch states for sequence, permissive, and diagnostic logic in SIMATIC S5 panels. Its signal conditioning supports the low-voltage sources assigned to the installation. The module accepts TTL, CMOS, and NAMUR-related low-voltage signals with a documented 1 kohm internal resistance.

        Choose the replacement by sensor standard, supply arrangement, input-level thresholds, line resistance, and front connector. The 20 mm × 255 mm × 195 mm body fits the compact module format. Its 100 Hz signal capability and approximately 3 ms delay suit fast discrete sensing when the connected sensor standard is verified.
        Alternative Names
        6ES5434-4UA12 6ES54344UA12 SIMATIC S5 434 Siemens 434 digital module S5 434 I/O module 434 compact module Siemens 6ES5434-4UA12
        Technical notes
        Use a verified 5/15 V DC source when testing Siemens 6ES5434-4UA12; an incorrect field level can misrepresent the low-voltage input state.
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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
        Which source level should be measured for Siemens 6ES5434-4UA12?
        The module provides low-voltage floating inputs for 5/15 v dc field signals.
        What common reference is required by Siemens 6ES5434-4UA12?
        It is matched to 434 compact input module and the established SIMATIC S5 backplane.
        What logic sources can Siemens 6ES5434-4UA12 read?
        Monitors low-voltage switches and logic devices in S5 panels.
        How is procurement of Siemens 6ES5434-4UA12 supported?
        Siemens treats the legacy order as discontinued; Apter Power can support documentation and sourcing checks.
        Should the S5 program be reviewed for Siemens 6ES5434-4UA12?
        Compare slot, connector, signal class, address map, and load protection before any exchange.
        Can Apter Power provide sourcing guidance for Siemens 6ES5434-4UA12?
        Send the full order code, quantity, destination, label details, and manual requirement for a matched response.

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