Rockwell-automation 57C421B Pulsetach Input Module/DCS 5000/AutoMax Manual de usuario descargar pdf (Pagina 60)

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In addition to these programming changes, input

impedances have changed from the 57421Ć1 module

to the 57C421A module. Be sure to check the external

5V pulse input circuitry.

D Note that if you are replacing a 57421Ć1 module with a 57C421A module,

you must add the three jumpers shown in figure 3.4 to the terminal strip of

the 57C421A module in order for the module to operate properly if the

original module was used with 12 V optoĆisolated inputs.

Module 57C421B differs from module 57C421A as follows:

D The 2 kHz timer has been replaced by a 200 kHz timer in 57C421B.

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Rockwell-automation 57C421B Pulsetach Input Module/DCS 5000/AutoMax Manual de usuario Pagina 60