<s>
Bus	B-Device
coupler	I-Device
is	O
a	O
device	O
which	O
is	O
used	O
to	O
couple	O
one	O
bus	O
to	O
the	O
other	O
without	O
any	O
interruption	O
in	O
power	O
supply	O
and	O
without	O
creating	O
hazardous	O
arcs	O
.	O
</s>
<s>
MIL-STD-1553B	O
specifies	O
the	O
transformer	B-Algorithm
characteristics	O
and	O
turns	O
ratio	O
of	O
1.4:1	O
with	O
the	O
higher	O
turns	O
on	O
the	O
isolation	O
resistor	O
side	O
of	O
the	O
stub	O
.	O
</s>
<s>
Normally	O
bus	B-Device
couplers	I-Device
are	O
available	O
with	O
1.4:1	O
transformer	B-Algorithm
ratios	O
and	O
59	O
ohm	O
(	O
2	O
watt	O
1%	O
)	O
resistors	O
.	O
</s>
<s>
For	O
special	O
applications	O
,	O
couplers	O
can	O
be	O
supplied	O
with	O
different	O
transformer	B-Algorithm
ratios	O
(	O
e.g.	O
,	O
1:1	O
)	O
and	O
other	O
resistance	O
values	O
(	O
e.g.	O
,	O
54.9	O
ohms	O
)	O
.	O
</s>
<s>
Bus	B-Device
coupler	I-Device
configurations	O
are	O
available	O
as	O
non-terminated	O
or	O
internally	O
terminated	O
.	O
</s>
<s>
RFI	O
dust	B-Device
caps	I-Device
(	O
with	O
or	O
without	O
safety	O
chains	O
)	O
are	O
recommended	O
for	O
all	O
unused	O
stub	O
ports	O
.	O
</s>
<s>
Data	O
bus	B-Device
couplers	I-Device
are	O
readily	O
available	O
in	O
2	O
through	O
8	O
stubs	O
and	O
in	O
various	O
sizes	O
and	O
shapes	O
of	O
boxes	O
and	O
slim	O
inline	O
models	O
.	O
</s>
