Rockwell-automation 4100-IF2 IF2 I/O Interface to PDM Installation Ins Instrukcja Użytkownika Pobierz pdf (Strona 6)

6 IF2 I/O Interface to PDM

Publication 4100-IN001A-EN-P- February 2001

Overview

The IF2 I/O Interface to PDM is a printed circuit board intended for

use with the positioning drive modules (PDM).

Figure 1 Front View of I/O Interface Board

These drives are built with output stages which source current to

their loads, and input stages which require a current sinking input to

operate. The 24 volt supply from the drive to the input/output (I/O)

is floating, and if the negative side is connected to safety ground

there is a possibility that an earth fault on a control wire would

cause the I/O to go to an active state resulting in an unexpected

action from the drive. In order to comply with EN60204-1: 1993, it is

necessary to connect the 24 volt positive circuit to ground if any

external control conductors (i.e outside the control enclosure) are

connected to the I/O. This can create compatibility problems with

some programmable logic controllers, and the purpose of this board

is to reverse the polarity of the I/O circuit to remove the problem of

compatibility.

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Rockwell-automation 4100-IF2 IF2 I/O Interface to PDM Installation Ins Instrukcja Użytkownika Strona 6