Model 232LB9R is a 9-pin version, boosting all eight signal lines and carrying ground through. Model 232LB2 is a 25 pin version, boosting TD (Transmit Data), RD (Receive Data), RTD (Request to Send), CTS (Clear to Send), CD (Carrier Detect) and DTR (Data Terminal Ready). A power supply is not included, is required and is available separately (see the accessory lists for the appropriate products below). Model 232OPDR is a DIN Rail RS-232 repeater and optical isolator.

Please note:
On the 232LB2 -- Male is to DTE, Female to DCE
On the 232LB9R -- Female is to DTE, Male to DCE