Provide close relay
The NUKI Opener can short-circuit a relay to open a garagedoor. Provide a separate relay to close a garagedoor.
The NUKI Opener can be used to open a garagedoor, but not close it by short-circuiting different lines.
Separate the opening and closing of a garagedoor: short-circuiting lines A and B would open the garage door, short-circuiting lines C and D would close the garage door.