L
ittfinski
D
aten
T
echnik
(
LDT
)
Operating Instruction
High Speed Interface
HSI-88 for the s88-
feedback bus
from the
Digital-Professional-Series
!
HSI-88-G
Part-No.:
030313
>> finished module in a case <<
⇒
Extremely fast (9600-baud) galvanic separated
connection through the serial port (RS232) of the
Personal Computer (PC).
⇒
3 feedback lines triple the reading speed of the s88
feedback bus.
⇒
3 feedback lines will also ease the grouping and
installation of the feedback modules below your
model railway panel.
This product is not a toy! Not suitable for children under 14 years of age! The kit
contains small parts, which should be kept away from children under 3! Improper
use will imply danger or injuring due to sharp edges and tips! Please store this
instruction carefully.
CE Part-No.:
24 02 66
Introduction / Safety Information:
You have purchased the
H
igh
S
peed
I
nterface
HSI-88
for the s88
feedback bus. The
HSI-88
is a high quality product, which is
supplied within the
Digital-Professional-Series
of
L
ittfinski
D
aten
T
echnik (
LDT
).
We wish you having a good time using this product.
•
Please read the following instructions carefully. Warranty will
expire due to damages caused by disregarding the operating
instructions.
LDT
will also not be liable for any consequential
damages caused by improper use or installation.
The finished modules in a case come with
24 month warranty
.
Connecting the Interface to your digital
control center and Personal Computer
(PC):
•
Attention: Please switch off your model railway by
disconnecting the transformers from AC-current, and
switch off your PC before starting the installation of the
unit.
Voltage
(14 to 18V AC from any model railroad transformer) will
be supplied via clamp
KL1
to the interface
HSI-88
.
If you use the
HSI-88
on a 3L system (Märklin tracks with center
conductor) you can use feedback modules which switch to
ground connection.
In this case please pay special attention to the correct
connection of the supply cables “brown” (system ground)
and “yellow”.
The input of clamp
KL1
is marked accordingly.
If your model railway software supports the
HSI-88
you need a
second free serial port
on your
PC
. This port will be mostly
indicated as
COM-Port
.
Use the
supplied computer
cable
to connect the
Interface HSI-
88
via the
free serial port
with your
PC
.
KL1
s8
8 R
üc
km
eld
eb
us
s8
8 f
ee
db
ac
k
bu
s
LE
FT
MID
DLE
RIG
HT
High Speed Interface 88
HSI-88
Rev. 2.1
Littfinski DatenTechnik
br.
gel
b
14.
.1
8V
~
Computer
RS232
Schnelles Computer-Interface für den s88-Rück-
meldebus. Ermöglicht 3 Rückmeldestränge.
High Speed Interface-88
HSI-88
Digital-Profi werden!
Littfinski DatenTechnik (LDT)
www.ldt-infocenter.com
At last connect the s88-feedback modules to the
HSI-88
Interface
by using the three 6-pole pin plugs marked
LEFT, MIDDLE
and
RIGHT.
With the
HSI-88
you can build up 3 feedback lines. This will give
the advantage of speeding up the reading of the feedback
modules by three times.
Another advantage is the simple arrangement and installation of
your feedback modules below your model railway track panel.
Start always with connecting the
first line
on the input marked
as
LEFT
of the
HSI-88
. If you want to build a second line connect
it to the input marked as
MIDDLE
. A third line must be connected
to the input marked as
RIGHT
accordingly.
Even if you use only some few feedback modules on your model
railway track it is recommended to
distribute
the feedback
modules
to all three inputs
(LEFT, MIDDLE, and RIGHT) of the
HSI-88
evenly.
As a result, the feedback-information will be much
faster
detected
by the
HSI-88
and transferred to the
PC
.
KL
1
R1
R7
R8
R1
1
R3
R9
R1
0
R6
R4
C8
D3
C
3
C
4
D
2
CD
45
03
IC
3
R2
R5
D
1
+
C1
0
L
1
C9
Q1
LM2574
IC
2
C
1
C
5
R1
2
C
2
1
5
9
6
BL
09
BU
1
89
C5
2
IC
1
L
T
V
8
4
7
IC
5
CD
45
03
IC
4
Rev. 2.1
ge
lb
br.
s8
8 R
ue
ck
me
ld
eb
us
s8
8 f
ee
db
ac
k b
us
RS232
Littfinski DatenTechnik
High Speed Interface 88
Computer
HSI-88
14
..1
8V
~
RIG
HT
MID
DL
E
LE
FT
