Instruction manual
C-Bus By Demand 3
Training Manual 8
1.2 LED Indicators
TherearetwoLEDIndicatorsontheCNI:
1)theEthernetLED.
2) theC‐BusLED.
TheseindicatorsidentifywhatthestateoftheEthernetorC‐Busis,byusingvariouscoloursand
flashingsequences.
1.2.1 EthernetLED
TheEthernetLEDhasmultiplestatesindicating differentconditionsfortheEthernetpartofthe
network,theyare:
Ethernet LED Condition Meaning
Red Bad Ethernet Link.
Red Flash (5 times) No DHCP Server found and a bad Ethernet Link.
Orange Good Ethernet Link.
Orange and Green Flashing Good Ethernet Link and an active session.
Table 1: Ethernet LED conditions.
1.2.2 C‐BusLED
TheC‐BusLEDalsohasmultiplestatesindicatingdifferentconditionsfortheC‐Buspartofthe
network,theyare:
C-Bus LED Condition Meaning
Red No C-Bus Connection.
Red Flashing No C-Bus Connection, active comms to Ethernet side.
Red / Orange Flash C-Bus clock present, C-Bus voltage marginal.
Orange C-Bus clock present, C-Bus voltage good.
Orange / Green Flash C-Bus clock present, C-Bus voltage good, active comms
to Ethernet side.
Table 2: C-Bus LED conditions.