CPC 810-1015 Handbuch - Seite 4
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POSITION
67
l-2
00
2400
*4800
9600
L=ON
0=OFF
o0
L0
0l_
l-L
b.
32
Failsafe
Switches
set the default output state.
If the
power
or
network
communication
fai1s,
these
switchei
along
with
jumpers
JU4-JU11
determine the
the
Normally
Open,
Normally Closed
Position of
the
relays.
Each
of the 8 switch positions
on s2 must
be
set for
proper operation
of the
jumpers,
JV4-JULl-
(next
to-
thL e
fuses)
. For
example,
if
jumper JU4
is
in the
rrNormally
Openrr
position, switch 1 of
32
should be
oFF. If
JU4
is in the
ttNormalfy
Closedrr
position, switch 1 of
52 should be
ON.
c.
Jumpers JU1rJU2,JU3
set terminating resistance for the
RS-
485 communication
bus.
DEVICES
AT
THE
ENDS
OF THE
EXPANSION
CO}'IMUNICATION
BUS REQUIRE TERMINATING RESISTORS FOR
PROPER
OPERATION
OF THE
RS-485 LINE.
These jumpers
are located
on
the
8RO
board
right
next to the
RS-485 communication
terminal block.
The
jumper
positions
depend
on
how
the
Bxpansion
Communication
Bus
is wired.
Use
FIG.
L
and the
configurations
below
to constuct a cable with
2-
conductor shielded
wire.
The
cable
should
be
20
gauge
Belden
#9154
or equivilant.
The
16A2
is
used below
as
an
example.
Other devices
cornmunicating
with the
8Ro
will foIlow the
same
general
rule.
*8RO----1602----8RO*
rt
8RO----
L6 02
----8RO----8RO:t
*1602----8ROit
r.
L 6
O
2
- -
--
8RO- - - - 8RO*
it
l_
6 0 2
----8RO----
8RO----$RO*
*
marked
devices
require terminating
resistors
3