Brand: AutomationDirect Item: Cable For Use With: Any OP600 or OP1000 series OptiMate unit and a DL340 CPU Cable Type: Communication Connection 1: 15-pin D-shell male Connection 2: 4-pin RJ11 Shielded: Yes AutomationDirect communication cable, 15-pin D-shell male to 4-pin RJ11, shielded. For use with any OP600 or OP1000 series OptiMate unit and a DL340 CPU.