User Manual
Table Of Contents
ADCP-75-126 • Issue B • April 2002 • Section 3: Host Unit Installation
Page 3-13
©
2002,
ADC
Telecommunications,
Inc.
8 CONTROLLER AREA NETWORK CONNECTIONS
Controller
area
Network
(CAN)
interface
connections
between
multiple
HU’s
are
supported
by
a
pair
of
RJ-45
jacks.
One
of
the
jacks
is
designated
as
the
NET
IN
port
and
the
other
jack
is
designated
as
the
NET
OUT
port.
The
CAN
interface
allows
up
to
24
HU’s
to
be
connected
together
(in
daisy-chain
fashion)
and
controlled
through
a
single
Digivance
EMS
computer.
A
one
meter
long
cable
is
provided
with
each
HU
for
CAN
connections.
Use
the
following
procedure
to
connect
CAN
interface
cables
between
multiple
HU’s:
1. Connect
one
end
of
the
CAN
interface
cable
(provided
with
the
HU)
to
either
the
NET
IN
or
NET
OUT
port
on
HU
#1
as
shown
in
Figure 3-11.
Figure 3-11. Controller Area Network Connections
2. Route
the
CAN
interface
cable
to
HU
#2
and
connect
the
cable’s
free
end
to
the
port
that
is
the
logical
opposite
of
the
network
port
the
cable
was
connected
to
at
HU
#1.
3. If
a
third
HU
will
be
connected
to
the
network,
connect
a
second
CAN
interface
cable
to
the
remaining
network
port
on
HU
#2.
4. Route
the
second
CAN
interface
cable
to
HU
#3
and
connect
the
cable’s
free
end
to
the
port
that
is
the
logical
opposite
of
the
port
that
the
cable
is
connected
to
at
HU
#2.
5. Repeat
steps
3
and
4
for
each
additional
HU
that
is
added
to
the
network
up
to
a
total
of
24
HU’s.
A
diagram
of
typical
CAN
interface
connections
is
shown
in
Figure 3-12.
Note:
If
connected
to
a
NET
OUT
port
at
HU
#1,
connect
to
the
NET
IN
port
at
HU
#2.
If
connected
to
a
NET
IN
port
at
HU
#1,
connect
to
a
Net
OUT
port
at
HU
#2.
16901-A
RJ-45 CONNECTOR
DETAIL