Using the 12v-5v converter for powering custom circuits?

FIRST General Forum
1

After pouring over the rules I have been unable to find anything referencing this leading me to believe that it is just fine, as the transformer is a 10A transformer and the Router draws only 785mA max

2

R44
The wireless bridge power feed must be supplied by the 12VDC-to-5VDC converter (P/N: CLL25-24S05) connected to the marked 12VDC supply terminals at the end of the PD Board (i.e. the terminals located between the indicator LEDs, and not the main WAGO connectors along the sides of the PD Board) shown in Figure 4?8. No other electrical load may be connected to these terminals.

This seems ambiguous to me. I would post to the Q&A.

3

That’s fine, if you mean that you’re going to use a **second **converter for this circuit. R44 says you must use a converter for powering the radio, and you can’t connect anything else to it.

R44:
The wireless bridge power feed must be supplied by the 12VDC-to-5VDC converter (P/N: CLL25-24S05) connected to the marked 12VDC supply terminals at the end of the PD Board (i.e. the terminals located between the indicator LEDs, and not the main WAGO connectors along the sides of the PD Board) shown in Figure 4?8. No other electrical load may be connected to these terminals.

4

I don’t think it’s all that ambiguous - it clearly states “No other electrical load may be connected to these terminals.” Whether the electrical load comes before or after the converter doesn’t matter - it’s still an electrical load that is connected to that output on the PDB.

Also, while the converter may be capable of handling higher loads, per the PDB documentation, that port will only supply 2A:

12V/2A boost supply with on-board 2A PTC for over-current protection (typically for powering a
WiFi adapter, the boost supply tracks battery voltage when the battery is fully charged and
greater than 12V)

5

If I were asked for clarification on this issue, I would disallow it.

There is a good bit of margin in the design of that boost regulator, but not enough to justify the added risk of allowing arbitrary extra loads. Browning out that supply will likely decide a match against you.

However, it is fine for non-competition use.

6

Thank you all I focused on the wrong set of rules

7