... , RoHS approvals Part No.Descriptionunitif11-M1*TP+1*fiber port,multi-mode,2Km,12~36VDC,SC/FCSTPcsCi-if21 ... -M2*TP+1*fiber port,multi-mode,2Km,12~36VDC,SC/FCSTPcsCk ... -if11-S1*TP+1*fiber port,single-mode,20Km,12~36VDC,SC/FCSTPcsCi ... TP+1*fiber port,single-mode,20Km,12~36VDC,SC/FCSTPcsTransmission distance and single fiber is optinal optical fiber converter/ ...