57421

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Pulse Tach Input Module Lorain 57C421.

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  • Part Number: 57421
  • SKU: 57421RE
  • Manufacturer: Reliance Electric
  • Series: AutoMax PLC

57421 Technical Specifications

Manufacturer Reliance Electric
Series AutoMax PLC
Part Number 57421
Product Type Pulsetach Input Module
Instruction Manual J-3680

About the 57421

The 57421 is a Reliance Electric Pulse Tach Module. There is a possibility that this device was also sold by Baldor Reliance and Asea Brown Boveri depending on what years this part was in production. None of these manufacturers still have support for the 57421, but AX Control does attempt to maintain this product in stock. Please consult our website to see if this item is in stock or not and when it can ship to you.

The 57421 is a Pulse Tach Input Module that was created to be part of the AutoMax Multibus I/O system. The main objective of this device is to be the main connection between a pulse tachometer and the AutoMax system. This is important because it allows the system to be able to track the speed measurements of the actual application.

This module has a 500-volt RMS isolation. It has a 24-bit counter and a comparator and a 100kHz maximum input frequency. It does not have any onboard jumpers. It has an input voltage of 5 V to 12VDC. It has a 16-bit 2kHz internal timer. This module has a total of eight registers that are accessible by AutoMax program tasks. They have the ability to be written to or read from program tasks.

This system has several LED indicator lights. They are labeled CCLK OK, REVERSE, FORWARD, LATCH, CLEAR, and COUNT STOP. This module plugs into the backplane on the AutoMax storage rack using the female card slots. The module can then be secured into place using the rack and faceplate brackets and two screws.

Frequently Asked Questions about 57421

What is included in a Reliance 57421?
Included in 57421 is a 24-bit counter, a 24-bit comparator, and a 16-bit interal timer. The basis of 57421 consists of a printed circuit board, faceplate, and protective enclosure.To find a description of each things included on 57421, look in the manual (Manual J-3680).
What are the external digital inputs on 57421?
57421 has three external digital inputs. Each of these inputs on 57421 causes 57421 to perform a specific function when an external signal is initiated. The origin clear input on 57421 resets the counter. The external latch input on 57421 reads the counter, and the external count stop input on 57421 stops the counter. For a diagram of these inputs on 57421, view figure 2.4 in the manual. The manual is Manual J-3680, the AutoMax Pulsetach Input Module Instruction Manual.
How many input channels does 57421 have?
57421 only has one input channel but multiple inputs.
Where can I find the manual for 57421?
We have the manual for 57421. Ask us for a link to the J-3680 manual for 57421 and we'll send the manual to you.
  • 57421-3

Repair Services For 57421

Type Lead Time Price Action
Repair Service 1-2 weeks $215

Our highly skilled technicians can repair your 57421. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
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All Motors: 1 Year
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57421 Manuals, White Papers, Data Sheets, and Troubleshooting