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Technical specifications for 6ES5420-4UA12
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Manufacturer:Siemens
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Product Category:PLC Systems
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Spare Part Number:6ES5420-4UA12
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Estimated shipping dimensions:25.4x2x19.5cm
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Weight:0.4 kg
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Tariff Code:8537101190
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Counliy of origin:Germany
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Product family:SIMATIC S5
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Module series:420
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Module type:Digital input
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Input count:32
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Rated input voltage:24 V DC
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Isolation:Non-floating
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Mechanical format:Compact version U
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Lifecycle statement:Available as a spare part only
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Acceptance basis:Identity, connector map, common reference and all 32 input states
Information
Overview
Manuals
Common Applications
Product Precautions
Siemens 6ES5420-4UA12 collects 32 non-floating 24 V DC digital input points in a compact SIMATIC S5 U-format module.
- Provides 32 digital input points.
- Uses a 24 V DC input level.
- Uses a non-floating common-potential arrangement.
- Carries the exact compact U spare-part execution 4UA12.
The exact data sheet identifies the 420 module as a 32-input, non-floating 24 V DC execution available as a spare part. Replacement work must retain the complete 4UA12 suffix and the installed common-potential wiring arrangement.
Important Notice: preserve the complete 6ES5420-4UA12 identity, all 32 input assignments, common reference, front-connector position and cabinet record before replacement.
Siemens 6ES5420-4UA12 Manuals & Downloads
Siemens 6ES5420-4UA12 Exact Product Data Sheet (PDF)Siemens 6ES5420-4UA12 Installation & Commissioning Guide (PDF)
The documents separate exact product evidence from the field sequence for identity, isolation, installation, verification and controlled handover.
Discrete signal acquisition
Collects up to 32 field-state signals in a SIMATIC S5 rack.
Legacy input replacement
Restores the exact compact U input position.
Common-reference maintenance
Preserves the non-floating wiring arrangement and return conductors.
Input fault isolation
Checks connector, common reference and each field input separately.
Apply these checks to the exact Siemens 6ES5420-4UA12 position before isolation, replacement or release.
1
Confirm the complete Siemens 6ES5420-4UA12 marking before work.
2
Place all 32 dependent field signals in the approved maintenance state.
3
Record every input address and common-reference conductor.
4
Photograph the front connector, slot and adjacent modules before removal.
5
Verify the circuit uses the documented 24 V DC input level.
6
Restore the non-floating common-potential arrangement exactly as recorded.
7
Review module and controller diagnostics after energization.
8
Functionally verify all 32 input states before service release.
Technical notes
Record every input address, common-reference conductor, connector position and cabinet slot before removal. After energization, review diagnostics and functionally compare all 32 input states with the retained field record.
FAQ View All FAQ
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What role does Siemens 6ES5420-4UA12 perform?It is a compact SIMATIC S5 420 digital input module providing 32 non-floating 24 V DC inputs.
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How many inputs does Siemens 6ES5420-4UA12 provide?It provides 32 digital input points.
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What input voltage is specified for Siemens 6ES5420-4UA12?The exact data sheet specifies 24 V DC inputs.
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Are the inputs of Siemens 6ES5420-4UA12 floating?No. The exact data sheet identifies the inputs as non-floating.
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Which mechanical format applies to Siemens 6ES5420-4UA12?It is the compact SIMATIC S5 U-format execution.
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What lifecycle statement applies to Siemens 6ES5420-4UA12?The data sheet states that the module is available as a spare part only.
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What must be recorded before replacing Siemens 6ES5420-4UA12?Record all 32 input assignments, the common reference, connector position and cabinet slot.
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What should confirm Siemens 6ES5420-4UA12 after installation?Confirm the exact article, retained wiring or cable arrangement, module diagnostics and every affected field signal before service release.
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