Two sets of terminals are provided for the connection
of iCANnet cables. Both iCAN terminals on the
control board are connected in parallel.
The recommended cable to use for iCANnet is: CAT5
FTP such as RS part numbers 196-331 for 305m or
298-0885 for 1000m.
The Control Board paralleled iCANnet terminals are
labelled with the recommended colours of the pairs
in CAT5 cable to use.
Orange pair
+12V
Blue/White
CAN-H
Blue
CAN-L
Green pair
0V
Brown pair
Shield
The structure of an iCAN network is shown in the
diagram below.
In the above example, resistors should be fitted at the
two ends of the network as marked with asterisks(*).
The devices on an iCAN network may be wired in
any order, but the network must be one continuous
“daisy-chain”. Spurs are NOT permitted, as this is
liable to result in communication problems.
Source Controllers and Control Panels are all shipped
with a 120 ohm Termination resistor fitted on the
iCANnet termination block. At all locations other
than the two end-of-line positions, the resistors
should be removed. Except where isolating Bridge
Nodes are installed, every iCAN network requires
two Termination resistors only.
iCANnet Connections
RS485 Control
The RS485 Control terminals are located adjacent
to the iCAN network terminals.
The terminals to be used are labelled:
RS485-
RS485+
0V
See the ASCII control message section on
page 13.
RJ12 Connector
The Source Controller is fitted with an RJ12
socket to allow local connection of a handheld
programmer or PC interface.
No connection should be made to the factory
pins of the connector.
Alarm Input
An alarm input, designed for connection to a fire
alarm system, is available on the same terminal
block as the RS485 connections. The terminals
to be used for an Alarm input are:
0V
AL
Any connection to this input MUST be volt free
and have a cable length of less than 50 metres.
Cabling for this input should be segregated from
power wiring.
The default action that occurs when these
terminals are linked is for every channel of the
source controller to turn on to maximum output.
It will then remain in this state, regardless of
any other command received, until the link
between the 0V and AL terminals is removed.
Only when the alarm link is removed can levels
be changed.
On an entire iCAN network only one fire alarm
input is required.
7 of 23
INTELLIGENT CONTROLS
