hmmm, wastfull way to get 12 volts i'd have thought, but at least it's not wasting as much power as it did with the secondary board in the circuit,
i'm thinking of another way to do the brake circuit based on your diagram, instead of the relay switching power to the board, it can open the inhibit switch (terminals I1 and I2) which shuts the board down when closed, so power will be removed from the board when the main switch is turned off, and the relay will drop out and activate the inhibit circuitry... just incase the board has enough residual power for a few milliseconds to do dammage when the motor is switched out.
if i run the power to the relays coil thru the 'spare' terminals on the direction change switch, they are closed when in either direction, open when in the centre position, so if i were to knock the switch to the middle position, the relay will drop out, braking the motor and shutting the board down at the same time,
the kbic manual says that after inhibit is released it re-starts the motor smoothly (on page 20, where it shows a way to do dynamic braking using a switch),