Canadian_JOY
Well Known Member
After using my good friend "Mr. Search" and reading through several contradictory posts from way back in history, I'm afraid I'm left scratching my head...
This is a net-new installation of an AF2500 (yeah, I know, it's been a very long build process!) in our aircraft, and a net-new installation of a Series 114 P-Mag, just back from the shop for their terrific flat-rate checkup and firmware update service.
What I can't figure out is how to wire up the tachometer signal from the P-Mag. I've seen posts that say "wire direct from P-Mag to AF2500 Analog Module", some posts saying to wire it that way but select 4-pulses-per-revolution instead of the default 2-pulses-per-revolution, and even one post from Rob Hickman which indicated using the raw P-Mag tach signal could result in damage to the AF2500 Analog Module.
Needless to say, I have no desire to damage our Analog Module, nor do I want a wonky tach that either doesnt work or doesn't read correctly. Because I want to be able to test the point at which the P-Mag internal generator stops producing power, I want to take the signal off the P-Mag since the impulse-coupled Slick mag will but grounded out during this test.
What does real-world experience say is the right way to hook up the P-Mag tach signal to the AF2500?
Thanks in advance for your helpful replies.
This is a net-new installation of an AF2500 (yeah, I know, it's been a very long build process!) in our aircraft, and a net-new installation of a Series 114 P-Mag, just back from the shop for their terrific flat-rate checkup and firmware update service.
What I can't figure out is how to wire up the tachometer signal from the P-Mag. I've seen posts that say "wire direct from P-Mag to AF2500 Analog Module", some posts saying to wire it that way but select 4-pulses-per-revolution instead of the default 2-pulses-per-revolution, and even one post from Rob Hickman which indicated using the raw P-Mag tach signal could result in damage to the AF2500 Analog Module.
Needless to say, I have no desire to damage our Analog Module, nor do I want a wonky tach that either doesnt work or doesn't read correctly. Because I want to be able to test the point at which the P-Mag internal generator stops producing power, I want to take the signal off the P-Mag since the impulse-coupled Slick mag will but grounded out during this test.
What does real-world experience say is the right way to hook up the P-Mag tach signal to the AF2500?
Thanks in advance for your helpful replies.