How to identify RL recievers when firmware sticker is missing on board.

It seems to me if you look at all the tiny print on the surface of the board, the version is printed there, probably toward an edge.

I think. No promises. It helps if you are near-sighted, as I am. Take off those glasses and really get down into it.

Nada, on the board. 

The version was only on the sticker.  The R4LC does have a different PIC processor as they needed more memory for the Legacy functions.  You can also identify the C07 version as it's lighting outputs under command control are positive, the C08 and later lighting outputs are negative.

gunrunnerjohn posted:

The version was only on the sticker.  The R4LC does have a different PIC processor as they needed more memory for the Legacy functions.  You can also identify the C07 version as it's lighting outputs under command control are positive, the C08 and later lighting outputs are negative.

Do you know the pic processor number of the r4. The other thing that I question is on my test jig. Some of the boards the smoke output increases coming off idle. On the others the smoke output comes up to a certain level and doing off idle doesn't affect the output. So, I believe a change was added at some point to cool the smoke unit at idle...wonder if this change was also in rl2. Or, only in R4

If you have a R4LC with the TMCC code, it works exactly the same as an R2LC-C08, so it wouldn't increase the smoke volume.

If you have a Legacy R4LC, the smoke output doesn't control smoke as that's done with a separate Voltage Regulator package, so clearly that's not it.

I've never seen or heard of any R2LC or R4LC that varied the smoke volume with one exception.

The old R2LC-C06 I believe, dropped the smoke at idle, it pulsed the smoke unit at idle to keep the resistor warm, then turned on when you started moving.  That was to accommodate mechanical smoke units.

I don't have an R4LC without a sticker, and I don't especially want to peel one off, so I can't tell you what the processor model is.

If I had to guess, I'd say it's likely that they used the PIC16F648A on the R4LC, lots more memory, the same footprint, and compatible functions with the PIC16F84A used on the R2LC.  I believe it was mentioned in the past that the change was to add memory for Legacy features, and since the boards look to be pretty similar (if not the same), that would be a logical drop-in replacement.

I believe the CO6 version is for accessories like the command control culvert loader.

Chuck, I'm not 100% sure which version did the pulsing, but it's in the C04 to C06 range.  I "thought" it was the C06, but clearly I could be mistaken.

"If you have a Legacy R4LC, the smoke output doesn't control smoke as that's done with a separate Voltage Regulator package, so clearly that's not it."

So, the smoke regulator receives serial command directly?

Correct, the smoke regulator receives track power, ground, serial data, and outputs smoke resistor voltage.  There's five wires on the smoke regulator, two grounds accounts for the extra wire.  Not sure why they needed two grounds, but many installations cut one of them off.

Here is a video of the board in question