Bywater played 10 times for Cardiff earlier this year
Sheffield Wednesday have signed out-of-favour Derby County goalkeeper Stephen Bywater on a 93-day emergency loan deal as cover for the injured Nicky Weaver.
Weaver, 32, was last week
ruled out for three months with a knee injury
and Bywater's deal lasts until 17 December - about the time Weaver should return.
Bywater has been told he can go after falling behind Frank Fielding and Adam Legzdins in the pecking order at Derby.
The 30-year-old had a
loan spell with Cardiff
at the end of last season.
Bywater, who has played 166 games in all competitions for the Rams, is in the final year of his contract at Pride Park.