Graco HydroShield WABL00, Instructions - Parts Manual

Page: 27 / 140

Installation
3. Switch the wires over to the new optocoupler
ports:
Optocoupler Optocoupler Optocoupler Port Port Port Terminal Terminal
Terminal Block
Block
Block
A1+ A1+
A1+
5
A2– A2–
A2–
6
NOTICE NOTICE NOTICE
To prevent damage to equipment, do not use
these terminal blocks without an optocoupler
present.
4. Remove unused terminal blocks.
Wire Wire Wire the the the Low Low Low Paint Paint Paint Digital Digital Digital Output Output Output
The Low Paint Digital output provides a means to
signal when the system is low on paint and when the
system has refilled. It is based on the user adjustable
"green on" and "red on" light tower settings. The
output is active when the red light is on and stays
active until the green light turns on. It remains
inactive until the reg light turns on again.
Prepare the electrical controls for service.
Follow the steps in
Prepare the Electrical Controls
for Service, page 105 .
The System Status Output uses an optocoupler
to protect the HydroShield controls from outside
voltages.
• Optocoupler ports A1+ and A2– are wired to the
control module.
• Optocoupler ports 13+ and 14 are wired to the
external device or PLC.
Function Function Function A1+ A1+ A1+ (relative (relative (relative
to to to A2–) A2–) A2–)
PLC PLC PLC
Low Paint Output
Active
24 VDC 13+ and 14
connected
Low Paint Output
Inactive
Less than 13.5
VDC
13+ and 14
not connected
3A8493A 27