Interbus-S is a serial bus, master/slave fieldbus communication system developed by Phoenix Contact to transmit data between control systems (PCs, PLCs, VMEbus computers, robot controllers, etc.) and distributed I/O modules which communicate with sensors and actuators/switches.

Interbus-S Remote Bus cable contains three twisted-pairs with a single, common shield for communications only, no power. Installation Remote Bus cable is similar to Remote Bus cable, except that it contains three additional conductors for supplying communications power (up to 4.5 amps) to various devices.