Tech Forum

Hi all,

I'm using a PDM25 as the central control and logic unit in an EV conversion — it drives the HV contactors and passes on shutdown commands from a separate BMS via CAN. Mine is the earlier revision (it came with the PDM 15/25 manual, not the newer 15/25/35 one), so I'd like to confirm a few behaviours against the right hardware before I finalise the safety design.

Three questions:

1. If the processor hangs or locks up while the unit is still powered, what happens to the outputs — do they hold their last commanded state, or switch off? I'm trying to work out whether a locked-up PDM could leave an output (and therefore a contactor) energised.

2. Is there any internal watchdog or fail-safe that switches the outputs off if the processor stops running normally? Or would I need to add an external heartbeat for that?

3. Can the PDM's…

Hey everyone, I am having an interesting issue. My ECU keeps randomly restarting. I have included a video of the issue. The HS Status on the output goes to 4 which is not listed in the manual anywhere, and the output does not show tripped. I have already replaced the entire engine harness to the ECU. Does this seem like a PDM issue or the ECU itself? Any input would be greatly appreciated!

Hello everyone, someone has a Emtron keypad (grayhill 8) working with the pdm? I would like the hardwire pdm to control it, not the emtron, I try with ID 900,901,902 that is what I could find on the Emtron information but never show up as connected. Any input would be appreciated.

Hey guys, recently got my car back from mapping and noticed that the pdm wasnt switching off with the switch, im having to trip the main power to get it to power down. i current have voltage coming out of my input channels, comfirmed with mulitmeter some have 11.9v others have 1to6v. bit off a loss why this has happened. latest version of softwear. photo attached.

Thanks for any help

Andy C

Annual inspection time in the airplane and checking firmware and making a few config changes. Says I have a V2 PDM-15 but can that be right? What firmware/sw should I update to?

I see you are making your way into some aviation with Virgil/Bearhawk! Good to see - mine continues to run flawlessly!

Hi, I am looking to import a CAN configuration file that was created by my GEMS ECU software in DBC format, I can't export the data in any other format.

I have tried to import that file directly but nothing changes. Is there a conversion utility in use to format it correctly for Hardwire?

TIA

Nigel

Hey everyone,

I am having a weird issue where my keypad (Blink Marine 12) seems to become disconnected from the PDM. The keypad stays lit but the buttons no longer function. I do not have a termination resistor at the keypad (I know this is not ideal since it is at the end of the canbus), but with the Terminator X handheld hooked up for datalogging and the Holley usb cable the resistance between the Can Hi and Can Low is already 53 ohms. Does anyone now if the lack of resistor could be the problem or is this a setup issue? I really appreciate any advice!

PDM not saving my output after I send them to PDM and save them. Shut PDM off went come back Started computer backup plugged into the P D M and it was all gone Plus the Blink Marine 12 button is Not saving Anybody have any ideas what I'm doing wrong

How come I don't show a tripped option on the outputs, the tripped count doesn't seem to do anything.