Output - Graco HydroShield WABH00 Instructions - Parts Manual

Installation
Install the the Optional Optional System
Install Install the Optional

Output

Output Output
The optional System Status Output provides a means
to signal connected devices that the HydroShield is
running.
The optional System Status Output optocoupler does
not come pre-installed and must be purchased and
installed separately. Install kit 24Z226 to use the
System Status Output.
The optional System Status Output is inactive when
the system is in Off mode. The optional System
Status Output is active in all other operation modes.
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.
For active-low signals/sourcing input: Connect GND
to 14. Assuming the input signal is at non ground,
monitor when 13+ is connected to GND to tell when
the System Status output is active.
For active-high signals/sinking input: Connect 24
VDC to 13+. Monitor when 14 is connected to 24
VDC to tell when the System Status Output is active.
26
System Status Status
System Status
Function A1+ (relative
Function Function A1+ A1+
System Status
Output Active
Less than 13.5
System Status
Output Inactive
1. Prepare the electrical controls for service. Follow
the steps in Prepare the Electrical Controls for
Service, page 106.
2. Mount the optocoupler (432) to the DIN rail (436)
to the right of the other pressure switch(s).
3. Switch the wires over to the new optocoupler
ports:
Optocoupler Optocoupler Port Optocoupler Port Port
A1+
A1+ A1+
A2– A2– A2–
To prevent damage to equipment, do not use
these terminal blocks without an optocoupler
present.
4. Remove unused terminal blocks.
(relative PLC
(relative PLC PLC
to to to A2–) A2–) A2–)
13+ and 14
24 VDC
connected
13+ and 14
VDC not connected
Terminal Block Terminal Terminal Block Block
5
6
NOTICE NOTICE NOTICE
3A8492A