Wire The System Stop Digital Input; Output - Graco HydroShield Instructions Manual

Installation
Wire the the System System Stop
Wire Wire the System
The System Stop Digital input provides a means to
signal the HydroShield system to stop. This normally
open contact turns the system off when activated.
If the input is read as CLOSED, it stops system
operation and puts the system into Off mode. If the
input is read as OPEN, the system operates normally.
The System Stop Digital input uses an optocoupler
to protect the HydroShield controls from outside
voltages.
Optocoupler Port Optocoupler Optocoupler Port Port
13+
14
A1+
A2–
NOTICE NOTICE NOTICE
To prevent damage to equipment, do not use these
terminal blocks without an optocoupler present.
Apply the 24 VDC signal to A1+ and GND to A2–.
Only one A2– port needs to be connected to GND, as
the two ports labeled A2– are connected internally.
Function
Function Function
System Stop: Digital
activated (system stop)
System Stop: Digital
inactive (system run)
26
Stop Digital Digital Input Input
Stop Digital Input
Connect to to to Connect Connect
Control module
External device
or PLC
A1+ (relative (relative to to to A2–) A2–)
A1+ A1+ (relative A2–)
24 VDC
Less than 13.5 VDC
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.
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 109.
2. Mount the optocoupler (432) to the DIN rail (436)
to the right of the other pressure switch(s).
System Status Status
System Status
(relative PLC
(relative PLC PLC
to to to A2–) A2–) A2–)
24 VDC 13+ and 14
connected
13+ and 14
VDC not connected
3A7370C