Wiring digital i/o, Polarity of i/o devices, Important – Rockwell Automation 1746-BLM Blow Molding Module Installation Instructions User Manual
Page 23

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