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Wiring digital i/o, Polarity of i/o devices, Important – Rockwell Automation 1746-BLM Blow Molding Module Installation Instructions User Manual

Page 23

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Blow-molding Module 23

Publication 1746-IN014B-EN-P - January 2001

Wiring Digital I/O

To use module hardware inputs (DIN) for start-of-drop synchronization, reset bit 05
= 0 of the G-file axis-configuration word, and wire as follows: (Channel 1 shown.
See page 27 for G-file configuration.)

Polarity of I/O devices

Transducers must be wired so that the voltage corresponding to the open or
retracted position is greater than the voltage corresponding to the closed or forward
position.

Actuators may be either direct or reverse acting. Applying a positive voltage to the
direct-acting type results in an increase in the corresponding process variable
voltage. Applying a positive voltage to the reverse-acting type results in a decrease
in the corresponding process variable voltage. Both types are accommodated by
the module.

IMPORTANT

If multiple power sources can be used, do not exceed the
specified isolation voltage.

22

21

16

15

24V dc

supply

14

13

digital output
sync output

digital input
start-of-drop trigger

+

-

+

-

+

-

+ 24V EXT

dc common