Combine mango and next 5 ingredients (through chile). Add 1/4 teaspoon salt and 1/4 teaspoon pepper; set aside.
Sprinkle salmon with remaining 1/4 teaspoon salt and remaining 1/4 teaspoon pepper. Place plank on grill rack; grill 3 minutes or until lightly charred. Turn plank over; place fish on charred side. Cover; grill 8 minutes or until desired degree of doneness. Place each fillet on a plate; top each with 1/3 cup mango salsa.