LDT Littfinski Daten Technik HSI-88-G Operation Instruction
Littfinski DatenTechnik (LDT)
Operating Instruction
High Speed Interface
HSI-88 for the s88-
feedback bus
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
14..18V~
br. gelb
LEFTMIDDLERIGHT
s88 feedback bus
s88 Rückmeldebus
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 High Speed Interface HSI-88 for the
s88 feedback bus. The HSI-88 is a high quality product, which
is supplied within the Digital-Professional-Series of Littfinski
DatenTechnik (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”.
Digital-Profi werden!
High Speed Interface-88
HSI-88
Schnelles Computer-Interface für den s88-Rückmeldebus. Ermöglicht 3 Rückmeldestränge.
L
ittfinski DatenTechnik (
www.ldt-infocenter.com
High Speed Interface 88
HSI-88
Rev. 2.1
Littfinski DatenTechnik
Computer
RS232
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.
RIGHT MIDDLE LEFT
s88 feedback bus
s88 Rueckmeldebus
CD4503
IC3
R2
C8
C9
Q1
C3
IC4
R12
R7
R8
R11
+
C10
CD4503
L1
C5
R1
R6
R5
IC1
89C52
High Speed Interface 88
HSI-88
Rev. 2.1
Littfinski DatenTechnik
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.
Computer
RS232
D3
LDT
D-25492 Heist
C2
C4
)
LM2574
IC2
IC5
LTV847
96
BU1
BL09
KL1
14..18V~
gelbbr.
D1
D2
C1
R3
R4
R9
R10
1 5
Even if you use only some few feedback modules on your
RS232
model railway track it is recommended to distribute the
feedback modules to all three inputs (LEFT, MIDDLE, 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.
10911
1213141516
8765432
1
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
L-Max M-Max R-Max
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
s88-N
www.ldt-infocenter.com
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
ST2ST1
Rev. 1.0
s88-N
IN
OUT
OUT
10911
1213141516
1
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
L
ittfinski DatenTechnik (
D-25492 Heist
s88-N
www.ldt-infocenter.com
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
Rev. 1.0
ST2ST1
s88-N
IN
OUT
OUT IN
10911
1213141516
1
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
L
ittfinski DatenTechnik (
s88-N
D-25492 Heist
www.ldt-infocenter.com
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
Rev. 1.0
ST2ST1
s88-N
IN
OUT
OUT IN
Bestellbezeichnung /
Order code: Kabel Patch xm
s88-N
IN
Kabel Patch 0,5m,
8765432
Kabel Patch 1m,
Kabel Patch 2m
oder / or
Kabel Patch 3m
LDT
)
s88-N
Kabel Patch 0,5m,
8765432
Kabel Patch 1m,
Kabel Patch 2m
oder / or
Kabel Patch 3m
LDT
)
s88-N
Adapter:
Adap-HSI-s88-N
BU1 BU2
L2 M2 R2
BU1 BU2
L1 M1 R1
BU1 BU2
Bestellbezeichnung /
Order code:
Kabel Patch xm
10911
1213141516
1
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
L
ittfinski DatenTechnik (
D-25492 Heist
s88-N
www.ldt-infocenter.com
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
ST2ST1
Rev. 1.0
s88-N
s88-N
BU1 BU2
IN
OUT
OUT
10911
1213141516
1
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
L
ittfinski DatenTechnik (
D-25492 Heist
s88-N
www.ldt-infocenter.com
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
Rev. 1.0
ST2ST1
s88-N
s88-N
BU1 BU2
IN
OUT
OUT IN
10911
1213141516
1
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
L
ittfinski DatenTechnik (
s88-N
D-25492 Heist
www.ldt-infocenter.com
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
Rev. 1.0
ST2ST1
s88-N
s88-N
BU1 BU2
IN
OUT
OUT IN
LEFTMIDDLERIGHT
Littfinski DatenTechnik (LDT)
Adap-HSI-s88-N Rev. 1.1
KL1
SolderSide
s88 Rückmeldebus
Digital-Profi werden!
High Speed Interface-88
HSI-88
Schnelles Computer-Interface für den s88-Rückmeldebus. Ermöglicht 3 Rückmeldestränge.
L
ittfinski DatenTechnik (
LDT
)
D-25492 Heist
www.ldt-infocenter.com
High Speed Interface 88
Computer
HSI-88
RS232
Rev. 2.1
Littfinski DatenTechnik
8765432
LDT
)
IN
8765432
LDT
)
8765432
LDT
)
14..18V~
br. gelb
Kabel Patch 0,5m,
Kabel Patch 1m,
Kabel Patch 2m
oder / or
Kabel Patch 3m
Kabel Patch 0,5m,
Kabel Patch 1m,
Kabel Patch 2m
oder / or
Kabel Patch 3m
Bestellbezeichnung /
Order code: Kabel Patch xm
gelb
yellow
braun
brown
10911
1213141516
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
s88-N
BU1 BU2
OUT
10911
1213141516
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
s88-N
BU1 BU2
OUT IN
10911
1213141516
KL6KL5KL4KL3KL2KL1
Digital-Profi werden!
Rückmeldemodul
RM-88-N
16 Rückmeldeeingänge für den
s88-Rückmeldebus.
s88-N
BU1 BU2
OUT IN
Vom Modellbahntrafo
From transformer
s88-N
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
Rev. 1.0
OUT
s88-N
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
Rev. 1.0
OUT
s88-N
Littfinski DatenTechnik (LDT)
Rückmeldemodul RM-88-N
16 - channel feedback module
Rev. 1.0
OUT
1
L
ittfinski DatenTechnik (
www.ldt-infocenter.com
ST2ST1
1
L
ittfinski DatenTechnik (
www.ldt-infocenter.com
ST2ST1
1
L
ittfinski DatenTechnik (
www.ldt-infocenter.com
ST2ST1
8765432
LDT
)
D-25492 Heist
s88-N
IN
IN
Kabel Patch 0,5m,
8765432
Kabel Patch 1m,
Kabel Patch 2m
oder / or
Kabel Patch 3m
LDT
)
D-25492 Heist
s88-N
IN
Kabel Patch 0,5m,
8765432
Kabel Patch 1m,
Kabel Patch 2m
oder / or
Kabel Patch 3m
LDT
)
D-25492 Heist
s88-N
IN
Computer
The above example shows a possible distribution of
feedback modules to the three inputs.
The administration and addressing of the feedback modules will
be supported by your model railway software.
How to register additional feedback modules please consult the
manual of your model railway software.
Standard feedback modules of the s88 feedback system
usually include 16 inputs.
With the HSI-88 up to 31 of those feedback modules (62 of
LDT RM-GB-8-N track occupancy detection modules with 8
inputs) can be controlled. Max. 31 modules can be connected
on each bus line. The summary of all three lines shall not
extend a total of 31 modules.
All s88-feedback bus compatible feedback modules can be
connected to the interface HSI-88.
Beside the LDT modules RM-88-N and RM-88-N-O for
moment-contacts and the RM-GB-8-N for track occupancy
detection even different types of feedback modules from
different manufacturers can be used.
Different brands and types can be connected to the feed back
lines even if they are mixed.
Further examples for using the HSI-88 and other LDT
products for performing feedback tasks with various kind of
contacts can be downloaded from our Internet Page (www.ldt-
infocenter.com) from the download section.
For the HSI-88-B kit a solid low-priced casing is available
under the part number LDT-01. Further details are available on
our Internet Page.
Communication with the PC:
After switching on the power supply a red LED at the HSI-88
will indicate ready-to-operate.
The HSI-88 works event driven that means that each feedback
information will be transferred directly to the PC. This saves
considerable PC resources and shortens the reaction time
as the PC does not have to poll feedback information in cycles
(which means delays) but the HSI-88 itself will report each
change to the PC directly and without delay.
During interaction between PC and HSI-88 via the serial port
the red LED will be OFF. As the interaction will be very fast the
LED will show therefore a kind of flickering.
If you want to include the communication with the HSI-88 into
your own written model railway software you can download a
list of complete commands from our LDT-Internet Page
(www.ldt-infocenter.com).
Trouble shooting:
What to do if something is not working as described above?
If you have purchased the interface as a kit please check
carefully all parts and all soldered joints.
Here you will find some descriptions of failures and the causes
respectively how to solve the problem:
1. The rail way software does not recognize the HSI-88.
Feedback information will not be transferred from Interface to
the PC.
• Is the LED of the HSI-88 on after switching the unit on? If
not, check the power supply on clamp KL1.
• Is the LED flickering after starting the rail way software?
Background: after starting the software the PC tries to
contact the registered HSI-88 Interface and the LED
should flicker. Does the LED not flicker it is possible that
the COM port is defective.
Check this by changing the serial ports of the digital
control unit with the port of the Interface HSI-88.
2. After starting the rail way software the LED of the HSI-88
Interface flickers. Nevertheless there will be no connection.
Deactivate the FIFO-Buffer of the connection adjustment for
the COM interface where the HSI -88 is connected to the PC.
With respect to the PC operating system (Win2000, XP, Vista,
Win7, Win8 e.g.) via Working Place, System Control, System
and Device Manager or similar.
Further products from our Digital-
Professional-Series:
Adap-HSI-s88-N
Via the 3-fold Adapter is it possible to connect s88-feedback
modules directly via the screened Patch-Kabel to the Interfaces
in accordance to
RM-88-N / RM-88-N-O
16-fold feedback module with 16 inputs (RM-88-N as Märklin
s88 switching against ground, RM-88-N-O with 16 galvanic
separated opto-coupler inputs) for s88-standard connections
s88-N
and
.
RM-GB-8-N
8-fold feedback module with integrated occupancy detectors
for a current load up to 3 Ampere (peak current 7 Ampere) for
s88-standard connections and
All products can be supplied as easy to assemble complete
kits as finished modules or as finished module in a case.
s88-N
.
s88-N
.
Made in Europe by
Littfinski DatenTechnik (LDT)
Kleiner Ring 9
D-25492 Heist/Germany
Phone: 0049 4122 / 977 381
Fax: 0049 4122 / 977 382
Internet: http://www.ldt-infocenter.com
Subject to technical changes and errors. 03/2015 by LDT
Märklin is a registered trademark.
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