The City Council received a petition on Monday signed by more than 200 residents in support of installing an automated external defibrillator at Plum Island Point, but the city’s public safety leaders remain opposed to the idea. Plum Island residents working with the Plum Island Foundation raised enough money to buy and install two automated external defibrillators and attached landline telephones – one at Plum Island Center in Newbury and another at Plum Island Point in Newburyport. The landline in Newbury connects to public safety dispatchers who would give a code to the caller which unlocks the defibrillator case so the device can be used in an emergency. Police Marshal Mark Murray and fire Chief Christopher LeClaire, have expressed concerns about the AED being improperly used by an untrained civilian, the possibility of vandalism and other complications that could come from having the device out on Plum Island.