The RP-C provides a room bus, which allows RP Series expansion modules and multi-sensors to be connected to the controller for motion detection, luminosity measurements, and control of electric lights and window blinds.
Cat 5 (or higher) cables with eight conductors (four twisted pairs) and RJ45 connectors should be used for connection to the room bus port on the RP-C controller and the RJ45 port(s) on the RP Series expansion modules and multi-sensors. The wire size (cross-sectional area) should be 22 to 26 AWG (0.34 to 0.14 mm²). The room bus cables should be rated for the target environment. For example, when the RP-C controller is installed in space handling conditioned air or return air, the cables must be plenum-rated to meet rigorous fire safety standards. The cables should be located away from external electrical noise sources such as high voltage cables or signal cables, which can cause data communication problems. The maximum total length of the sensor bus is 72 m (236 ft).
Unshielded cables
UTP (unshielded twisted pair) cables are recommended for the room bus.
Shielded cables
Shielded cables are not useful to use for the room bus, because the RJ45 receptacles on the RP-C controllers and RP Series expansion modules and multi-sensors do not support grounding of the shield.
Cat 5 (or higher) cables with eight conductors (four twisted pairs) and RJ45 connectors should be used for connection to the room bus port on the RP-C controller and the RJ45 port(s) on the RP Series expansion modules and multi-sensors. The wire size (cross-sectional area) should be 22 to 26 AWG (0.34 to 0.14 mm²). The room bus cables should be rated for the target environment. For example, when the RP-C controller is installed in space handling conditioned air or return air, the cables must be plenum-rated to meet rigorous fire safety standards. The cables should be located away from external electrical noise sources such as high voltage cables or signal cables, which can cause data communication problems. The maximum total length of the sensor bus is 72 m (236 ft).
Unshielded cables
UTP (unshielded twisted pair) cables are recommended for the room bus.
Shielded cables
Shielded cables are not useful to use for the room bus, because the RJ45 receptacles on the RP-C controllers and RP Series expansion modules and multi-sensors do not support grounding of the shield.
Released for:Schneider Electric South Africa
