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
ensurethecorrectoperationoftheC‐BusNetworkInterface:
1) C‐BusConnection
2) 12VoltPlugAdaptor
3) EthernetConnection.
Figure 1: Three wiring connections to a CNI.
1.1.1 C‐BusConnection
The C‐Bus power connection is used so the C ‐Bus Network Interface can transmit and receive
C‐Busmessagesontothenetwork.
On the front of the C‐Bus Network Interface there is a LED labelled ‘C‐Bus.’ This LED will
illuminateorangeiftheC‐Busisconnected,andredifthereisaproblemwithC‐Bus(noC‐Bus
ClockorVo
ltage)orC‐BusConnection.
1.1.2 12VoltConnection
The 12 Volt plug pack connects to the two screw down terminals on the top left of the C‐Bus
NetworkInterface.The12Voltconnectorisnotpolaritysensitive,andwillacceptbothACand
DC voltages. The 12 V connector is used to power the Ethernet to RS‐232 module, which is
foundinsideoftheunit.
The 12 V plug pack is not designed to provide power to multiple C‐Bus Network
Interfaces,soensurethateachunithasitsowndedicatedplugpack.
1.1.3 EthernetConnection
The Ethernet connection is used to connect the C‐Bus Network Interface to the Ethernet
network.
On the front of the C‐Bus 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.