Digitrax SE74 Manuel - Page 11

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Digitrax SE74 Manuel
FIGURE 8: A/D direction Dual 2-wire searchlight heads
not allow for Lunar lamps. OPSW35 polarity sets RED/GREEN choice.
6.
Be sure to set LED polarity/type: OPSW33/34/35 to your actual signals.
7.
The SE74 is setup to drive LEDS only, using external customer current set-
ting resistors with about 5 volt unloaded drive levels.
8.
For more signaling accessories and more information, see the Signaling
section of the www.digitrax.com web site. If you need larger images, color or
text, reference the pdf of these instructions on the web site.
8.0 Setup Notes:
1.
In pulse solenoid mode; for problem solenoids, try OPSW16=C for higher
current Capacitive Discharge pulse action.
2.
In all modes a 12-14V DC 0.3A supply should suffice, depending on the Sig-
nal head brightness setting.
3.
If you operate a SE74 with just DCC track power on TKA/TKB terminals, it
will not have all features available.
4.
For 2-wire pulse solenoids, e.g. a Kato N-crossover, just wire to R/G termi-
nals in the polarity that operates as you need. Do not run more than one
solenoid device per SE74 pulsed R/G output pair.
5.
The combined Static turnout/Lamp and Signal mast loads should set less
than 0.30A draw on the DC input. For Slow motion turnouts the total
current per output R/G pair ON should draw less than 0.05A referred to DC
input plug.
6.
Take care not to short any of the SE74; SE1 cables, R/G Outputs and P+
leads, or connect to other voltages like DC, Track power etc. This may cause
damage not covered by Warranty.
7.
If the SE74 flashes the "Ident" pattern of ID & RTS LEDs alternating with
OPS LED for 3 seconds it has detected an overload and has shutdown P+
voltage. Identify the overload and fix this before resuming operation.
8.
The Digitrax original SE1 cable design has the multiplex symmetrical so the
A/D and B/C masts can be rotated and alternately tested in a single socket.
© 2022 Digitrax, Inc.
The SE74 manages turnout voltages and current.
— 11 —
FIGURE 9: B/C direction Dual 2-wire searchlight heads
www.digitrax.com