13
Connecting
to
a
third
‐
party
device
via
RS485
interface
Use
an
RS485
（
422
compatible
）
connector
under
the
RJ45
category
to
connect
to
a
third
‐
party
device.
A
third
‐
party
device
control
cable
must
be
an
RS485
cable
that
meets
the
following
requirements:
•
The
RJ45
connector's
T+
and
R+
terminals
are
shorted
and
then
connected
to
the
third
‐
party
device's
RS485+
connector;
the
RJ45
connector's
T
‐
and
R
‐
terminals
are
shorted
and
then
connected
to
the
RS485
connector
of
the
third
‐
party
device,
as
shown
in
the
following
figure.
•
If
the
third
‐
party
device
is
grounded,
the
third
‐
party
device
control
cable's
Terminal
G
is
connected
to
the
RJ45
connector's
Terminal
G
(No.7
or
8).
1:
Third
‐
party
device
RS485
control
cable
2:
RS485+
3:
RJ45
connector's
T+
and
R+
terminals
are
shorted
4:
RS485
‐
5:
RJ45
connector's
T
‐
and
R
‐
terminals
are
shorted
6:
Twisted
pair
When
using
an
RS422
cable
as
a
third
‐
party
device
control
cable,
connect
the
cable
as
follows:
•
Connect
RJ45's
T+
to
the
third
‐
party
device's
R+;
RJ45's
T
‐
to
the
third
‐
party
device's
R
‐
;
RJ45's
R+
to
the
third
‐
party
device's
T+;
RJ45's
R
‐
to
the
third
‐
party
device's
T
‐
,
as
shown
in
the
following
figure.
