StEin
Stationary Equipment Module Page 15
5.
The 8 Track Sections, Overcurrent and Short circuits
Each of the 8 insulated track sections is connected to one of the “P” output pins; the “N”
rail is normally not sectioned off and is therefore continuous; the “N” pins on the StEin
are internally connected in parallel; it is therefore irrelevant whether only one of them is
used or all.
There are 3 control-LED’s for each track output, next to the “P” terminal:
- Top: the
red
-
green
H
L
U
-LED
: indicates the current HLU setting of the track section us-
ing a color scale from
red
(“H”) to
green
(“F”) or red flashing (for “A”).
- Middle: the
blue
overcurrent and short circuit
LED
: to control the processes dur-
ing overcurrent and short circuits; for detailed description see next pages, the
general meaning is always the same, though
solid blue
: track section is currently switched off; either waiting for the next au-
tomatic reset, or finally (after reaching the maximum number of reset at-
tempts), for a manual reset.
flickering blue (about 10 kHz) in combination
with
steady light:
track section
was automatically switched on again, but overcurrent is still present; therefore,
it will be shut down again shortly; typical picture resulting from this: alternat-
ing flickering and steady lighting.
flickering blue (about 10 kHz)
without
steady light:
Immediate turn-off due to
short circuit and test-based reset in quick succession; final shutdown after 25 cy-
cles.
- Bottom: the
yellow occupancy and RailCom LED:
in addition to occupancy detec-
tion, received RailCom messages (Channel 2) are made visible
by brief LED
flickers
; this indicates how often loco address(es) are queried in a track section
through DCC commands.
Special case - yellow flashing (approx. 1, 2, 5 Hz):
After the final shutdown
due to overcurrent or short-circuit (i.e.
blue LED lit continuously),
the yellow
LED shows the cause for the shutdown (slow overcurrent, fast overcurrent, or
short circuit).
Notes to wiring track sections:
The cable routing from track outputs to track sections usually, but not always, is doable
without problems: Cables wired in parallel can provoke capacitive or inductive crosstalk,
concerning data in forward direction (DCC signal, HLU information) as well as feedback
(RailCom, loco number impulses).
WILL BE ADDED LATER
Preliminary photo; the illustrated
display pattern is not possible under
normal
operating conditions.
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