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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power supports AutoMax PLC sourcing, document review, and exact-order quotation.

        57C420

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Reliance Electric 57C420 is a AutoMax 5-24 V DC Output Module. It provides thirty-two solid-state outputs for 5-24 V DC field loads.
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        Ships by Wednesday, October 28
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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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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 57C420

        • Manufacturer:
          Reliance Electric
        • Part Number:
          57C420
        • Product Family:
          AutoMax PLC
        • Product Type:
          DC Output Module
        • Stock:
          1
        • Output points:
          32
        • Output range:
          5 to 24 V DC; maximum operating voltage 30 V DC
        • Maximum load:
          750 mA per output; 1.8 A per common
        • Isolation grouping:
          Four outputs per isolated common
        • Logic-to-output isolation:
          5000 V AC
        • Maximum saturated drop:
          1.5 V
        • Backplane power:
          +5 V at 850 mA
        • Dimensions:
          11.75 x 1.25 x 7.375 in
        • Environment:
          0 to 60 deg C operating; 5 to 90% RH noncondensing
        • Weight:
          0.82 kg
        • Estimated shipping dimensions:
          3x19x34.4cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • 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 Communication & Connectivity Configuration Environmental Ratings

        Features:

        • Provides thirty-two solid-state outputs for 5-24 V DC field loads.
        • Allows up to 750 mA per point within the 1.8 A common-group limit.
        • Uses four outputs per isolated common with high logic-to-field isolation.
        The module converts AutoMax backplane commands into thirty-two low-voltage DC switching outputs for field loads.

        Application logic writes an output image to the module. Solid-state output circuits source the commanded 5-24 V DC state to each load, while isolated common groups limit the propagation of field-side faults.

        Verify field-supply polarity, common grouping, cable and terminal-strip identity before enabling outputs. Removing or inserting the module or its cables can cause unexpected machine movement.

        Availability is reviewed against the exact 57C420 order identity and requested supply condition; manufacturer lifecycle status: Discontinued / Obsolete by OEM.
        Verified resources for Reliance Electric 57C420: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.
        • A single point may switch up to the documented 750 mA, but the four-output common is limited to 1.8 A. Thermal and power calculations must therefore consider the simultaneous load pattern, not only individual point current.
        • The outputs can drive compatible relays, indicators, solenoids and other DC loads in machine or process-control panels when surge suppression and field supply design are suitable.
        • Receives its commanded output image through the AutoMax rack backplane.
        • Provides 32 discrete outputs for AutoMax field-control circuits.
        • Operates across 5 to 24 V DC, with a 30 V maximum.
        • Field-supply polarity and terminal identity must match before outputs are enabled.
        • Each channel switches 750 mA; each common supports 1.8 A.
        • Four outputs share each isolated field common.
        • Logic-to-output isolation is rated at 5000 V AC.
        • Supports 0 to 60 deg C and 5–90% noncondensing humidity.
        • Maximum saturated output drop is 1.5 V.
        • Draws 850 mA from the +5 V backplane supply.
        Description
        Reliance Electric 57C420 The module converts AutoMax backplane commands into thirty-two low-voltage DC switching outputs for field loads. Application logic writes an output image to the module. Solid-state output circuits source the commanded 5-24 V DC state to each load, while isolated common groups limit the propagation of field-side faults.

        A single point may switch up to the documented 750 mA, but the four-output common is limited to 1.8 A. Thermal and power calculations must therefore consider the simultaneous load pattern, not only individual point current. The outputs can drive compatible relays, indicators, solenoids and other DC loads in machine or process-control panels when surge suppression and field supply design are suitable.

        Verify field-supply polarity, common grouping, cable and terminal-strip identity before enabling outputs. Removing or inserting the module or its cables can cause unexpected machine movement.
        Alternative Names
        57C420 57-C420 57 C420 Reliance Electric 57C420 AutoMax 57C420 57C420 DC Output Module 57C420 5-24 V DC Output Module Reliance Electric AutoMax 57C420 Output Module
        Technical notes
        De-energize field loads before disturbing Reliance Electric 57C420, and confirm supply polarity, isolated common grouping, cable, and terminal-strip identity because an incorrect output reconnection can start machinery unexpectedly.
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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
        Where do Reliance Electric 57C420 outputs connect in machine control?
        The module converts AutoMax backplane commands into thirty-two low-voltage DC switching outputs for field loads.
        Which output voltage limits apply to Reliance Electric 57C420?
        The manufacturer data specifies Output range as 5 to 24 V DC; maximum operating voltage 30 V DC; the installed arrangement must match that exact value.
        How does Reliance Electric 57C420 transfer rack commands to loads?
        Application logic writes an output image to the module. Solid-state output circuits source the commanded 5-24 V DC state to each load, while isolated common groups limit the propagation of field-side faults.
        What polarity and common checks protect a Reliance Electric 57C420 installation?
        Verify field-supply polarity, common grouping, cable and terminal-strip identity before enabling outputs. Removing or inserting the module or its cables can cause unexpected machine movement.
        Does commissioning alter the obsolete status of Reliance Electric 57C420?
        The page records Discontinued / Obsolete by OEM. Apter Power reviews the exact order identity and condition without presenting this as an OEM delivery promise.
        Which load-circuit evidence supports a Reliance Electric 57C420 quotation?
        Submit the complete nameplate, Maximum saturated drop (1.5 V), installed system evidence, condition, quantity and destination so the document and quotation match 57C420.

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