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6ES5458-4UA12

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Siemens 6ES5458-4UA12 is a compact SIMATIC S5 relay-output module with sixteen isolated contacts and a 24 V DC relay supply. RC-equipped and unequipped contacts have different switching limits.
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Technical specifications for 6ES5458-4UA12

  • Manufacturer:
    Siemens
  • Part Number:
    6ES5458-4UA12
  • Product Family:
    Siemens Simatic S5
  • Product Type:
    Relay Digital Output Module
  • Stock:
    1
  • Module designation:
    458
  • I/O function:
    relay digital output
  • Channel capacity:
    16 outputs
  • Field electrical class:
    24 V DC relay supply
  • Isolation:
    16 isolated outputs
  • System bus current:
    5 V, 80 mA typical
  • Power dissipation:
    5.2 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
  • Contact capacity with RC module:
    60 VDC / 48 VAC, 0.5 A
  • Contact capacity without RC module:
    60 VDC / 48 VAC, 70 mA
  • Relay life:
    10^8 cycles mechanical
  • Individual fusing:
    16 x 1 A slow
  • Weight:
    1.175 lbs (0.533 kg)
  • Estimated shipping dimensions:
    26.9 x 21.0 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 Standards Monitoring Compliance

Features:

  • Presents sixteen individually isolated relay-output paths.
  • Operates its relay section from a 24 V DC supply.
  • Uses individual slow fuses and supports defined RC suppression options.
The 4UA12 suffix denotes this specific sixteen-contact 458 arrangement, including its compact width and relay-supply requirements.

Mechanical contacts let the S5 program switch field circuits with isolation that differs from a transistor-output card.

Identify which loads use RC modules and note their operating frequency before removal. Verify contact condition and field voltage before the front wiring is reconnected.

6ES5458-4UA12 is reviewed with its contact suppression and 24 V relay-supply arrangement.
Verified resources for Siemens 6ES5458-4UA12: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.
  • Operate isolated interposing circuits from a compact S5 relay-output position.
  • Switch moderate AC or DC loads through approved RC-protected contacts.
  • Maintain individual fused relay channels in an established S5-135U cabinet.
  • Apply the official RC-equipped and unequipped contact tables to the actual load circuit.
  • Keep UL and general VDE switching limits distinguished in design records.
  • Use the specified slow fuse rather than increasing the rating after a nuisance operation.
  • Observe contact response at the load because a commanded bit does not prove mechanical closure.
  • Track repeated fuse operation as evidence of an external fault or excessive inrush.
  • Include relay-cycle history when assessing an ageing output used at high frequency.
  • Keep every field circuit within its documented voltage, current and switching-frequency limits.
  • Maintain the required separation among sixteen isolated output conductors.
  • Record the fitted suppression components as part of the validated panel configuration.
Description
6ES5458-4UA12 is the 20 mm-wide 458 relay board providing sixteen isolated output paths for S5-135U and S5-155U systems. A 24 V DC relay supply operates the onboard mechanisms, while the field contacts switch the connected circuits according to the binary state commanded through the S5 process image.

Contact capability depends on the protection fitted around each relay. With the specified RC arrangement, the documented capacity reaches 60 V DC or 48 V AC at 0.5 A; without that network, the allowed current is only 70 mA at the same voltage class. Sixteen 1 A slow fuses provide individual protection.

Selecting this article therefore requires knowledge of the actual load, suppression method and expected switching frequency, not just the number of points. During replacement, preserve the enable connection and isolated terminal map, inspect contact loads for inductive transients, and replace any damaged suppression components before operating a fresh module.
Alternative Names
6ES5458-4UA12 6ES5458 4UA12 6ES54584UA12 Siemens 6ES5458-4UA12 6ES5458-4UA12 SIMATIC S5-135U/155U Digital I/O Siemens Relay Digital Output Module 6ES5458-4UA12 Relay Digital Output Module
Technical notes
6ES5458-4UA12 contact capacity changes sharply with the approved RC network; confirm suppression and load type before applying the 0.5 A figure to a field circuit.
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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 does an RC module change Siemens 6ES5458-4UA12 contact duty?
With the specified RC protection, the documented limit is 0.5 A at 60 V DC or 48 V AC; without it, the figure is 70 mA.
What mechanical endurance is stated for Siemens 6ES5458-4UA12 relays?
The official module data lists a mechanical relay life of 10^8 operating cycles.
Why is switching frequency important for Siemens 6ES5458-4UA12?
Frequent operation increases relay wear, and inductive loads require lower switching rates and suitable suppression.
Which supply operates the relays on Siemens 6ES5458-4UA12?
The relay mechanisms use the documented 24 V DC supply, separate from the voltage being switched by the contacts.
How should a noisy coil be connected to Siemens 6ES5458-4UA12?
Fit the approved suppression at the load or use the documented RC arrangement so inductive energy does not damage the contact.
When is contact resistance testing useful on Siemens 6ES5458-4UA12?
It helps assess suspect relay paths after high cycle counts, overheating or operation beyond the intended load duty.

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