Wire The Low Paint Digital Output; Isolation System - Graco HydroShield WABH00 Instructions - Parts Manual

Wire the the Low Low Paint Paint Digital
Wire Wire the Low Paint
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 106.
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+ (relative A1+
Low Paint Output
Active
Low Paint Output Less than 13.5
Inactive
3A8492A
Digital Output Output
Digital Output
(relative (relative PLC PLC PLC
to to to A2–) A2–)
A2–)
24 VDC 13+ and 14
connected
13+ and 14
VDC not connected
Check the the Grounding Grounding of of of the
Check Check the Grounding
Gun and and Isolation

Isolation System

Gun Gun and Isolation
Megohmmeter Part No. 241079 is not approved
for use in a hazardous location. To reduce the risk
of sparking, do not use the megohmmeter to check
electrical grounding unless:
• The gun has been removed from the hazardous
location;
• Or all spraying devices in the hazardous
location are turned off, ventilation fans in the
hazardous location are operating, and there are
no flammable vapors in the location (such as
open solvent containers or fumes from spraying).
Failure to follow this warning could cause fire,
explosion, and electric shock and result in serious
injury.
Graco Part No. 241079 Megohmmeter (AB) is
available as an accessory to check that the gun is
properly grounded.
1. Have a qualified electrician check the electrical
grounding continuity of the spray gun and air
hose.
2. Turn off the electrostatics.
3. Turn off the air and fluid supply to the gun. Follow
the Pressure Relief Procedure, page
fluid hose must be empty.
4. Purge the fluid hose with air, if needed.
5. Follow the spray gun manual to check proper
grounding of the spray gun.
Installation
the Spray Spray
the Spray
System
System
30. The
27