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    Discontinued / Obsolete by OEM
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57C421

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Reliance Electric 57C421 is a DCS 5000 / AutoMax Pulsetach Input Module. It accepts one high-speed pulsetach input at up to 125 kHz.
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Technical specifications for 57C421

  • Manufacturer:
    Reliance Electric
  • Part Number:
    57C421
  • Product Family:
    AutoMax PLC
  • Product Type:
    Pulsetach Input Module
  • Stock:
    1
  • Input channels:
    1
  • Supported input forms:
    Differential, emitter-follower, open-collector or single-ended
  • Input level:
    TTL to 13.2 V DC maximum
  • Maximum frequency:
    125 kHz
  • Combined filter cutoff:
    250 kHz
  • Maximum cable length:
    600 ft / 180 m
  • Isolation:
    2500 V AC RMS
  • Backplane power:
    +5 V at 900 mA
  • Weight:
    1.7968 lbs (0.815 kg)
  • 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 Interoperability Integration Monitoring

Features:

  • Accepts one high-speed pulsetach input at up to 125 kHz.
  • Supports differential, open-collector, emitter-follower or single-ended signals.
  • Conditions and isolates the pulse path before backplane processing.
The module accepts a high-speed pulse-train from a tachometer or compatible position sensor so the AutoMax control system can determine machine speed or position-related events.

Input conditioning accepts several electrical sensor forms, applies isolation and filtering, and presents the pulse information to the controller. Frequency is proportional to shaft or machine speed according to the installed transducer pulse count.

Confirm sensor output type, voltage, maximum frequency, cable shielding and pulse-per-revolution value before replacement. Mechanical speed limits are determined by the connected transducer and application.

Availability is reviewed against the exact 57C421 order identity and requested supply condition; manufacturer lifecycle status: Discontinued / Obsolete by OEM.
Verified resources for Reliance Electric 57C421: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.
  • The differential option supports stronger noise rejection over the documented cable distance. Single-ended or open-collector circuits require the correct bias, reference and grounding arrangement.
  • Typical tasks include rotating-speed feedback, pulse counting, line synchronization and supervisory monitoring in coordinated drive or machine-control systems.
  • Supports speed, count and synchronization functions in AutoMax applications.
  • Accepts pulse trains from tachometers or compatible position sensors.
  • Supports differential, emitter-follower, open-collector, and single-ended input forms.
  • Provides one high-speed channel for speed or position-related events.
  • Accepts TTL signals up to a maximum input level of 13.2 V DC.
  • Processes pulse frequencies up to 125 kHz.
  • Combined input filtering has a documented 250 kHz cutoff.
  • Conditions and isolates pulses before transferring speed information to the controller.
  • Supports cable runs up to 600 ft or 180 m.
  • Provides 2500 V AC RMS isolation between field and logic circuits.
Description
Reliance Electric 57C421 The module accepts a high-speed pulse-train from a tachometer or compatible position sensor so the AutoMax control system can determine machine speed or position-related events. Input conditioning accepts several electrical sensor forms, applies isolation and filtering, and presents the pulse information to the controller. Frequency is proportional to shaft or machine speed according to the installed transducer pulse count.

The differential option supports stronger noise rejection over the documented cable distance. Single-ended or open-collector circuits require the correct bias, reference and grounding arrangement. Typical tasks include rotating-speed feedback, pulse counting, line synchronization and supervisory monitoring in coordinated drive or machine-control systems.

Confirm sensor output type, voltage, maximum frequency, cable shielding and pulse-per-revolution value before replacement. Mechanical speed limits are determined by the connected transducer and application.
Alternative Names
57C421 57-C421 57 C421 Reliance Electric 57C421 AutoMax 57C421 DCS-5000 57C421 57C421 Pulsetach Input Module Reliance Electric AutoMax 57C421 Pulsetach Module
Technical notes
Commissioning Reliance Electric 57C421 requires the tachometer's output form, voltage, pulse-per-revolution value, maximum frequency, and shielded cable route to match the application speed range.
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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 Reliance Electric 57C421 use a tachometer pulse train?
The module accepts a high-speed pulse-train from a tachometer or compatible position sensor so the AutoMax control system can determine machine speed or position-related events.
What sensor output forms can feed Reliance Electric 57C421?
The manufacturer data specifies Supported input forms as Differential, emitter-follower, open-collector or single-ended; the installed arrangement must match that exact value.
How does Reliance Electric 57C421 condition a pulse train?
Input conditioning accepts several electrical sensor forms, applies isolation and filtering, and presents the pulse information to the controller. Frequency is proportional to shaft or machine speed according to the installed transducer pulse count.
Which scaling limits must be confirmed for Reliance Electric 57C421?
Confirm sensor output type, voltage, maximum frequency, cable shielding and pulse-per-revolution value before replacement. Mechanical speed limits are determined by the connected transducer and application.
How should the legacy supply record for Reliance Electric 57C421 be applied?
The page records Discontinued / Obsolete by OEM. Apter Power reviews the exact order identity and condition without presenting this as an OEM delivery promise.
What tachometer data should accompany a Reliance Electric 57C421 inquiry?
Submit the complete nameplate, Maximum cable length (600 ft / 180 m), installed system evidence, condition, quantity and destination so the document and quotation match 57C421.