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StEin

Stationary Equipment Module Page 7

T E C H N I C A L D A T A :

Power for

Track (DC-

out “S1” or “S2” from ZIMO MX10 or separate power supply) …………..….….. 12 - 24 V

Accessory voltage (DC-

out “S1” or “S2” from ZIMO MX10 or separate power supply) …….. 12 - 24 V

CAN bus (usually from the MX10 or MX1 CAN bus so

cket) ……………................................. 12 - 35 V

Output current

on single track outputs (necessarily automatic short circuit switch-off) ................................. 8 A

total current of all 8 track outputs ………...........................................................................

10 A

for each turnout output (or other components) ……………………….………..…………………

2 A

total current of all 16 turnout outputs ................................................................................

5 A

for the 5V auxiliary output .………………………..………………………………………………... 1 A

Others:

Minimum current flow at the track for reliab

le occupancy detection …….…………..…………... 1 mA

(the occupancy threshold can be set higher than 1 mA in the configuration data)

Internal consumption of the StEin from track and accessory voltage .......................................... 350 mA
Internal consumption from the CAN bus voltage (if not supplied by track or accessory)

….……. 150 mA

Dimensions ……..……………………………………………………………….………. 180 x 120 x 20 mm

The

“HLU” - technique

also known as “signal controlled speed influence” and “location dependent

function control” - is integrated in ZIMO digital systems and ZIMO decoders *).

HLU is a communication protocol from one track output of the StEin module (former MX9 track sec-
tion modules) to the decoder located on the track section; HLU data can be different from one track
section to another (e.g. regarding HLU steps), they do NOT have addresses and are read individually
by each ZIMO decoder (and decoders of some other manufacturers).

HLU data usually contain commands to stop trains or reduce their speed to one of the 7 HLU steps;
see list above. HLU data reaches the decoders practically immediately, because it is sent out about
100 times/sec. For the track section outputs of the StEin, the interlocking program (on the computer)
usually sets HLU steps.

Similar to the central command station MX10, the StEin possesses high quality RailCom detectors,
however, 8 of them (for each of the 8 track sections). The analysis of the feedback from the vehicles
allows, for example, to show the position of a train on the controller and the interlocking program, or to
show the layout-dependent direction East-West.

Note to

S E T T I N G S O F T H E M X 1 0

when using StEin modules

StEin modules have overcurrent and short circuit detection for every track section output; also see
chapter “The 8 track sections, overcurrent and short circuit”; here a short description:

In the

“Parameter sheet”

, every track section can be defined individually regarding overcurrent and

short circuit handling, whereby generally it is not very useful to set too many differences between the
track sections. Overcurrent (typical values between 1 and 3 A in parameters UESLAMP and
UESSAZT in the object lines of the track sections) leads to a delayed switch-off (in parameters UES-
LAZT and UESSAZT = turn-off time), in case of short circuits (typical threshold 4 to 8 A according to
KUSAMP) it turns off immediately; in both cases there is a number of automatic restarts (in parame-
ters UESLEAZ, UESSEZ, KUSEZT) after which the system is finally turned off.

The goal of these settings and procedures is that only the one track section is turned off, on which an
overcurrent or short circuit occurs. On the other hand, it would be wrong, if the supply of the running
voltage from the MX10 (to which the StEin modules are connected) would be turned off entirely in case
of an overcurrent or short circuit on a track section. To avoid such misconduct, certain rules have to be
complied with regarding “Voltage & Current”, namely the values for “OVC threshold” and “OVC turn-off
time”, sometimes also “OVC tol. current” can be used. All these settings are entered via the main menu
“VOLT & AMPERE detail”, and have to be set for the corresponding track output (1: or 2:)

Highest value for the turn-off parameters UESLAZT / UESSAZT Useful value
in the object lines for the track sections fo

r “

OVC turn-off time

” in the MX10

100 ms (to write into the StEin object), means 0.1 sec               0.3 sec
200 ms (to write into the StEin object), means 0.2 sec               0.5 sec
500 ms (to write into the StEin object), means 0.5 sec               0.8 sec
700 ms (to write into the StEin object), means 0.7 sec               1.0 sec

The “

OVC threshold

” in the MX10 shall follow the following criteria:

1) according to the expected current consumption on the layout (or on the track output),

2) but at least the 2.5-fold of the higher overcurrent parameters UESSAMP
in the object lines of the track section.

Technical description

added to the above described rules (especially the turn-off times):

Contrary to the track outputs of the central command station MX10, the outputs of the StEin do not
have a constant current regulation, which would bridge the time until the turn-off (the turn-off time).
The StEin hereby relies on the MX10; i.e. when exceeding the overcurrent threshold (according to
parameters UESLAMP or UESSAMP, as far as the current stays beneath the threshold for short
circuits KUSAMP) the current continues to flow in the amount provided by the output of the MX10
(according to “OVC threshold”). The track output of the MX10 thereby goes into its own turn-off ac-
cord

ing to “OVC turn-off time” - therefore the value has to be set considerably higher than the over-

current turn-off times UESLAZT and UESSAZT in the StEin, so the StEin output turns off faster and
the rest of the layout is not affected.