Wiring
Wiring
Wiring the
the
the Optional
Optional
Optional Interlock
Interlock
Interlock Input
Input
Input
The Optional Interlock Input provides a means
to signal the System Logic Controller to stop the
ProBell system. This normally open contact turns
the applicator off when activated. If the ProBell air
controller reads the input as CLOSED it interrupts
system operation and puts the gun into Gun Off
mode. If the input is read as OPEN, the system
operates normally.
The optional interlock optocoupler does not come
pre-installed and must be purchased and installed
separately. Install kit 24Z226 to use the Optional
Interlock Input.
For each ProBell Air Controller, the Interlock Input is
on different terminal blocks. Remove the wires in the
existing terminal blocks and install in the Optocoupler
ports as shown below.
Terminal
Terminal
Terminal Block
Block
Block
Manual
Manual
Manual Air
Air
Air
Controller
Controller
Controller
Electronic
Electronic
Electronic Air
Air
Air
Controller
Controller
Controller
Optocoupler
Optocoupler
Optocoupler
Port
Port
Port 14
14
14
9
8
Optocoupler
Optocoupler
Optocoupler
Port
Port
Port 13+
13+
13+
10
9
NOTICE
NOTICE
NOTICE
To prevent damage to equipment, do not use these
terminal blocks without an optocoupler present.
The Optional Interlock Input uses an optocoupler to
protect the Graco ProBell air control box from outside
voltages.
• Optocoupler ports 13+ and 14 are wired to the
control module.
• Optocoupler ports A1+ and A2- are wired to the
external device or PLC.
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.
A1+
A1+
A1+ (relative
(relative
(relative to
to
to A2–)
A2–)
A2–)
Function
Function
Function
24 VDC
Interlock Activated
(system stop)
Less than 13.5 VDC
Interlock Inactive
(system run)
3A3954D
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