Siemens 6ES5420-4UA12
Siemens 6ES5420-4UA12
Siemens 6ES5420-4UA12
Siemens 6ES5420-4UA12
Siemens 6ES5420-4UA12
Siemens 6ES5420-4UA12
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  • Lifecycle status

    Discontinued / Obsolete by OEM
    Apter Power supports 6ES5420-4UA12 document review, configuration matching and quotation.

6ES5420-4UA12

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Siemens 6ES5420-4UA12 is a SIMATIC S5-420 digital input module with 32 non-floating 24 V DC channels. Siemens records the legacy article as deleted without a direct replacement.
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Technical specifications for 6ES5420-4UA12

  • Manufacturer:
    Siemens
  • Part Number:
    6ES5420-4UA12
  • Product Family:
    Siemens Simatic S5
  • Product Type:
    Digital Input Module
  • Stock:
    1
  • Digital inputs:
    32, non-floating
  • Nominal input voltage:
    24 V DC
  • Input low level:
    -33 to +5 V
  • Input high level:
    +13 to +33 V
  • Input current:
    Approximately 8.5 mA
  • Input resistance:
    Approximately 2.8 kohm
  • Input delay:
    Typical 3 ms
  • Maximum input frequency:
    100 Hz
  • Permitted diversity:
    100 percent
  • Unshielded cable length:
    Up to 600 m
  • Shielded cable length:
    Up to 1000 m
  • 5 V bus current:
    Approximately 80 mA
  • Mass:
    Approximately 0.4 kg
  • Lifecycle:
    Deleted without replacement
  • 2-wire BERO supply:
    22 to 33 V DC
  • Enable input current:
    Approximately 5 mA
  • Enable cable length:
    Up to 200 m
  • Impulse withstand test:
    1 kV
  • Channel indication:
    Green status LEDs
  • Enable indication:
    F+ enable display
  • Weight:
    0.882 lbs (0.4 kg)
  • Estimated shipping dimensions:
    25.4 x 2 x 19.5 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 Monitoring & Control Diagnostics & Protection Compatibility

Features:

  • Thirty-two non-floating 24 V DC inputs use a typical 3 ms qualification delay.
  • The module accepts full channel diversity and provides green input-status indication.
  • The article is discontinued without a direct replacement.
The order number belongs to the SIMATIC S5-420 input family and must be matched exactly for legacy spares.

Field levels are compared with defined thresholds, then transferred to the S5 process image when the enable path is valid.

Preserve the connector schedule, F+ enable wiring and software address map because no plug-in successor is available.

Apter Power can support exact-model configuration review and quotation for Siemens 6ES5420-4UA12.
Verified resources for Siemens 6ES5420-4UA12: 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.
  • Existing S5 machines can collect dense interlock and equipment-feedback signals through one 32-point card.
  • Two-wire BERO sensors can use the module supply when their current and wiring meet the specified limits.
  • Long field runs can be engineered with the shielded or unshielded cable limits for established installations.
  • Voltage thresholds and a short input delay convert contact or sensor signals into the controller process image.
  • Thirty-two 24 V DC field states are acquired for classic SIMATIC S5 control and interlock programs.
  • The non-floating input arrangement requires the prescribed common reference across all thirty-two digital channels.
  • The 24 V DC input front end evaluates field signals against defined low and high thresholds before state transfer.
  • Voltages from -33 V to +5 V are treated as low, helping reject inactive or reverse-polarity field conditions.
  • Signals from +13 V to +33 V are accepted as high so energized contacts can be recognized reliably.
  • The non-floating channel layout must match the SIMATIC S5 rack's shared reference and process-connector wiring.
  • Connected 24 V devices must satisfy the defined input resistance and threshold ranges for dependable state detection.
  • Because the module was deleted without replacement, migration requires a system-level review rather than a direct substitute.
Description
6ES5420-4UA12 reads thirty-two 24 V DC field states for SIMATIC S5 control programs. Its non-floating channels use voltage thresholds, approximately 8.5 mA input current and a typical 3 ms delay to form the process image used by the legacy CPU.

The card supports full input diversity and cable lengths up to 600 m unshielded or 1000 m shielded within the specified installation limits. A 22–33 V supply is available for compatible two-wire BERO devices, and the front LEDs display channel state together with the F+ enable condition.

Siemens marks the article deleted without replacement, so a migration cannot be inferred from a newer number. Keeping an operational spare requires verification of rack type, address allocation, front connector, enable circuit and the S5 program that interprets these input bits.
Alternative Names
6ES5420-4UA12 6ES5420 4UA12 6ES54204UA12 Siemens 6ES5420-4UA12 Siemens 6ES5420 4UA12 6ES5420-4UA12 Digital Input Module Siemens 6ES5420-4UA12 SIMATIC S5 420 6ES5420-4UA12 Catalog Number
Technical notes
Because 6ES5420-4UA12 is deleted without replacement, verify the S5 rack, connector and program address before the outage; a physically similar input card is not automatically electrically compatible.
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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.
How many non-floating channels are provided by 6ES5420-4UA12?
It provides 32 non-floating 24 V DC digital inputs with 100% permitted diversity.
How are two-wire sensors supported by 6ES5420-4UA12?
The module provides a 22–33 V BERO supply for compatible devices using the specified circuit.
What does the F+ indication show on 6ES5420-4UA12?
It relates to the module enable path, which must be present for the input card to operate as engineered.
How far may field wiring extend from 6ES5420-4UA12?
Cable length reaches 600 m unshielded or 1000 m shielded within the specified installation limits.
Has Siemens named a direct successor for 6ES5420-4UA12?
No. The article was deleted without replacement.
Which S5 rack evidence is needed to identify the obsolete 6ES5420-4UA12 correctly?
Record the full label, rack and CPU, slot address, connector wiring, F+ circuit, program backup and required spare condition.

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