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Donaldson Company, Inc.
Perfect Pulse Controller Installation (PLC)
The PLC is used to control the filter cleaning system.
The PLC requires a 105 to 135-Volt, customer-supplied power supply.
Do not mount the PLC directly to the collector or the positive displacement blower as mechanical vibration
can damage the timer.
1. Choose a location convenient for accessibility and maintenance.
2. Using the wiring diagram supplied, wire the blower motor, blower-motor starter, PLC, and solenoid valve. Use appropriate wire
gauge for rated amp load as specified by the local codes.
Electrical installation, service or maintenance work during installation must be performed by a qualified electrician
and comply with all applicable national and local codes.
Turn power off and lock out all power before performing installation, service, or maintenance work.
Do not install in classified hazardous atmospheres without an enclosure rated for the application.
Timer and Solenoid Specifications
Power to the Perfect Pulse Controller is supplied to Terminals L1 and L2, which are intended to operate in parallel with the positive
displacement blower starter’s low-voltage coil. On fan start-up, power is supplied to the timer and the preset OFF time is initiated.
At the end of the OFF time, the timer energizes the solenoid valve to provide the ON time cleaning pulse for the diaphragm valve
and repeats this cycle until the system is shut down. The timer can also be wired for on demand cleaning with an external pressure
switch. If this option is selected, the high and low limit pressure switch relays will be connected to the TB2 corresponding terminals.
Otherwise, the common and high limit terminals on TB2 are jumpered to provide continuous operation.
Note: If the collector was supplied with an electrical control panel, the wiring diagram supplied with the control panel takes
precedence over the general diagrams shown in this manual.
Solenoid Connection
The collector is equipped with a solenoid valve (typically 120V) that controls the pulse-cleaning valve, which cleans the filters.
Electrical installation, service, or maintenance work must be performed by a qualified electrician and comply with all
applicable national and local codes.
This equipment may start or stop unexpectedly from a remote location.
Turn power off and lock out all power before performing service or maintenance work.
The appropriate wiring schematic and electrical rating must be used. See collector’s rating plate for required voltage.
Do not install in classified hazardous atmospheres without an enclosure rated for the application.
Electrical Wiring
