Ripley joins the League Two side on an initial week's loan to cover injuries, short-term loans for keepers allowed by the EFL in those circumstances.
The 28-year-old will be available for Salford' s games against Hartlepool today and Rochdale on Tuesday.
He last played in a competitive for North End against Wycombe Wanderers in the FA Cup in January.
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Ripley isn't in PNE's 25-man squad for Championship matches.
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