I've seen both of these in example FLARMCFG files, are they both correct?

# configure D-SUB 9 port
$PFLAC,S,NMEAOUT2,61
$PFLAC,S,BAUD2,2

and

# For brick, turn on output data on DB9 serial port (both GPS and FLARM).
# Needed if you want this data !
# Ignored on portable.
$pflac,s,nmeaout2,1


Kirk
66