[LW] [LW11] Connecting the constant running hydraulic pump E12172 to the ACU-300 pump

[guavaberrytree]

Hi,

From where do we get the supply for the motor, as there is no "motor" connection on the ACU-300? I didn't find the information in the ACU-300 installation manual.
Thanks.

[Louise - Raymarine - Moderator]

Dear guavaberrytree,

The ACU300 does not have a 12v power supply for a motor, the ACU300 is for solenoid drive units only. What drive unit do you have as it seems the ACU300 could be the incorrect auto-pilot for your steering system.

Please find the table below for referencing suitable auto-pilots for your drive type.

Many Thanks
Louise

[guavaberrytree]

Thank you Louise.
I have a solenoid drive unit, the Raymarine constant running hydraulic pump E12172.

[Louise - Raymarine - Moderator]

Dear guavaberrytree,

Thank you for the response.

I have just reviewed the manual for the E12172, the image has not been updated to reflect the ACU300. Where it states motor in the image, this should say solenoid. I will get this amended.

Take the positives of Solenoid cable A and Solenoid cable B to the Solenoid A and B ports on the ACU300, then the negatives need to run back to the negative port on the ACU300.

Many Thanks
Louise

[guavaberrytree]

Hi Louise,

I understand how to connect the solenoids, but I am not sure where to connect the motor.
My question is: From where do I get the 24V for the motor?

Thanks.

[Derek - Raymarine - Moderator]

Hi guavaberrytree

Thank you for your feedback

The motor supply is direct from distribution board where it can be correctly fused or protected by a circuit breaker. The supply can be switched by a relay so that the pump only runs when AUTO is selected, the relay can be triggered by the BYPASS connection on the ACU300.

Regards
Derek

[guavaberrytree]

Hi Derek,

Thank you very much. I am glad to learn that I can use the "bypass" connection to trigger a relay.

Best regards.

[Derek - Raymarine - Moderator]

Hi Guavaberrytree

You're welcome

Thanks
Derek

[guavaberrytree]

Hi Derek,

I have connected a relay to the "bypass" connection of the ACU 300.
When I press "auto" I get the right voltage but after about 10 seconds, the voltage drops to 0V. I tried without anything connected to the "bypass" connection, I tried the 12V and the 24V positions, no difference. How can I get a constant voltage on this "bypass" connection?

Thank you.

[Derek - Raymarine - Moderator]

Hi guavaberrytree

The outcome you advise is expected - with nothing connected across the output terminals, the ACU identifies that there is nothing connected and so only supplies output for a short period of time, it then shuts down.

We have had reports that testing with a 12v Light bulb will be enough load to enable the output to remain functional.

Regards

Derek