Arduino test code:

#define PIR_MOTION_SENSOR 2  //Pin D2 is connected the module output
#define LED  13  //Assume the Arduino has an LED on D13

void setup() {
  pinMode(PIR_MOTION_SENSOR, INPUT);
  pinMode(LED,OUTPUT);
  digitalWrite(LED,LOW);
}

void loop() {
  int sensorValue = digitalRead(PIR_MOTION_SENSOR);
  if(sensorValue == HIGH)
    digitalWrite(LED,HIGH);
  else
    digitalWrite(LED,LOW);
}

Related datasheets

Examples :