Help w/ 3-way switching

Hi, I currently have a Powerswitch running some circuits. Would it be possible to have VDC always on for a light circuit, _and_ be able to use a relay for a manual switch?

Diode with the output of the Powerswitch tied into the relay power out (86)? Would something like that work? What diode?

See illustration.

 

No one has an SPOD, Switch Pros, or any other circuit that wanted a secondary manual switch?

 

Ok, redrew and rephrasing— could a diode or secondary relay (or both) be added to allow the switch box to continually have power to turn on the light (box below)? Utilizing 87B? Unsure.

 

pin 87 = input - *FUSED* Constant 12+vdc (probably truck battery)
pin 87a = input - powerswitch 12+vdc circuit wire
pin 30 = output - provides 12+vdc to light
pin 85 = input - 12+vdc from manual switch
pin 86 = output - to chassis ground

this configuration allows for two power inputs and one output. this also keeps power from back feeding into ethier circut. With the manual switch off, the powerswitch can be activated and still provide power to the light.

 

I knew I was close, but this helps immensely; thank you.

Is there an 'always on' fuse tap (still waiting for Meso fuse cover to be in stock) on the driver's right switch panel that's recommended? Any advantages or disadvantages to this (other than perhaps the obvious of accidentally leaving it on)?

Another note: the Powerswitch has 'trip' inputs ('control terminals') that can also trigger a circuit, perhaps even bypassing a relay: https://www8.garmin.com/manuals/web...398EC08/EN-US/Garmin_PowerSwitch_OM_EN-US.pdf

Haven't looked into it, but it seems like another option?


I thought there was another relay that could be added (can't recall) that auto shuts down?

 

QQ; couldn't all these polar pins be swapped like 'normal'? Ex.:
pin 87 = output - provides 12+vdc to light
pin 87a = input - powerswitch 12+vdc circuit wire
pin 30 = input - fused 12VDC
pin 85 = output - to chassis ground
pin 86 = input - 12+vdc from manual switch

In other words, 87 swapped with 30, 85 and 86 swapped.

 

for pins 30, 87 | In short, no
for pins 85, 86 | In short, Yes (if no diode is present in the relay)

Please take a look at the image below.





For a single 5 pin relay, 87 & 87a will always be the opposite of whatever pin 30 is. one of them has to be an input and the other has to be an output.
Traditionally, 30 is the input and 87/87a is the output.

in your use case, 30 is the output.

87 & 87a will never complete a circuit between those two pins..... if they do, you have a short due to water getting into the internals of the relay - you have way bigger issues at that point.