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Section 4 PTO CONTROL MODE
PTO Control is used for electrically actuating a 12V PTO solenoid.
The PTO Control key activates a discrete high side driver in the APCM to power up an auxiliary load, such as a
Power Take-Off, electric clutch, or other implement.
When the application requires the PTO to turn on and run at an elevated engine speed, there is an option to do this
called PTO/RPM LINKED. With PTO Control and RPM Control linked, the PTO driver will turn on and engine
speed will increase to the desired engine speed. This feature requires programming. Read about PTO/RPM
LINKED operation in Section 4.4.
There are also programmable options for lower and upper limits.
The
PTO lower limit
works as "
maximum PTO clutch engagement protection
" by allowing the PTO output
driver to turn on only if engine speed is below the programmed lower limit.
The
PTO upper limit
works as "
PTO overspeed protection
" by turning off the PTO output driver whenever the
engine speed exceeds the programmed upper limit.
The following diagram shows how the upper and lower PTO speed limits function when programmed.
Section 4.1 BASIC OPERATION OF PTO CONTROL
The [PTO CONTROL] key works like a on/off switch. Press the key once to turn on the 12V PTO Control high side
driver, and press the key again to turn off.
The PTO output wire must be installed correctly for proper operation. Be sure to read and follow the installation
instructions given in Section 6 and the PTO output specifications in Section 9 before proceeding.
Step 1 Activate the PTO Control output.
•
Start engine and power up APCM
•
Press [PTO CONTROL] key on the module
» Light next to PTO Control key turns on
» PTO output to the auxiliary load turns on
Exiting PTO Control mode
•
Press [PTO CONTROL] key to de-activate
OR
•
Press [POWER] key to de-activate
» Light next to PTO Control key turns off
» PTO output to the auxiliary load turns off
PTO
CONTROL
Can Activate
PTO in this
RPM range
Can Operate PTO
Cannot Activate PTO
in this RPM range
Cannot Operate
PTO in this
RPM range
PTO Lower Limit
for ENGAGEMENT
Default: 1000 RPM
PTO Upper Limit
for OVERSPEED
Default: 3400 RPM
Typical Idle
Speed
650 RPM
Max RPM for
PTO Operation
2000 RPM
Engine Speed
(RPM)
Min RPM for
PTO Operation
1200 RPM
2000 RPM
