Instruction manual

C-Bus By Demand 3
Training Manual 7
1.1 Wiring
There are three fundamental wiring connections shown in Figure 1, which must be made to
ensurethecorrectoperationoftheCBusNetworkInterface:
1) CBusConnection
2) 12VoltPlugAdaptor
3) EthernetConnection.
Figure 1: Three wiring connections to a CNI.
1.1.1CBusConnection
The CBus power connection is used so the C Bus Network Interface can transmit and receive
CBusmessagesontothenetwork.
On the front of the CBus Network Interface there is a LED labelled ‘CBus.’ This LED will
illuminateorangeiftheCBusisconnected,andredifthereisaproblemwithCBus(noCBus
ClockorVo
ltage)orCBusConnection.
1.1.212VoltConnection
The 12 Volt plug pack connects to the two screw down terminals on the top left of the CBus
NetworkInterface.The12Voltconnectorisnotpolaritysensitive,andwillacceptbothACand
DC voltages. The 12 V connector is used to power the Ethernet to RS232 module, which is
foundinsideoftheunit.
The 12 V plug pack is not designed to provide power to multiple CBus Network
Interfaces,soensurethateachunithasitsowndedicatedplugpack.
1.1.3EthernetConnection
The Ethernet connection is used to connect the CBus Network Interface to the Ethernet
network.
On the front of the CBus Network Interface there is a LED labelled ‘Ethernet.’ This LED will
illuminate orange if the connection to Ethernet is successful. If there is a problem with the
EthernetconnectiontheLEDwillill
uminatered.