UPDATE 2-US says offer to talk with Iran is not open-ended

(For a Take A LOOK on Iran's politics and nuclear plans click on [nLP150493]) * Clinton says offer of talks not open-ended * Criticizes Iran's actions after election * Clinton plans to go to Pakistan in autumn (Adds more quotes, speech delivered)

By Sue Pleming

WASHINGTON, July 15 (Reuters) - Secretary of State Hillary Clinton said on Wednesday that Iran's intentions were unclear following last month's election and that the U.S. offer of talks with Tehran over its nuclear program was not open-ended.

The top U.S. diplomat deplored Iran's "repressive" actions against protesters after the election and said neither she nor President Barack Obama were under any illusions that talks with Tehran would guarantee success.

"We have made it clear that there is a choice for the Iranian government to make and we will wait to see how they decide," she said in a speech to the Council on Foreign Relations think tank.

"The prospects have certainly shifted in the weeks following the election," said Clinton. "We have made it very clear this is not open-ended. This is not a door that stays open no matter what happens," she added.

Clinton's speech, on the eve of a trip to India and Thailand, was aimed at raising her public profile while outlining policy priorities that include talking to enemies such as Iran.

Recovering from elbow surgery after a fall last month, Clinton has been largely out of the limelight in recent weeks, canceling planned travel to Europe and leaving much of the diplomacy to her deputies and special envoys.

The former Bush administration refused to engage Iran directly until it had met certain preconditions, including suspending uranium enrichment, a process that can produce fuel for nuclear power plants or atomic weapons.