5.8 LocoNet Connection Jacks A & B
These LocoNet Connection Jacks let you expand your Digitrax system by sim-
ply plugging LocoNet devices in to the system.
5.9 MODE Switch
The 3 MODE switch settings are:
RUN
is for normal operations.
OP
is used to customize the DB150 by changing its option switch set-
tings.
SLEEP
is used to shutdown the system and all throttles that are plugged
in to the system.
5.10 SCALE Switch (O/G HO N)
This switch sets the maximum track voltage limit.
This provides safe operation for all scales. Digitrax recommends running your
DB150 at the lowest setting that gives acceptable operation. The N scale set-
ting is sufficient for most HO operations and provides an extra safety margin.
5.10.1 Track Voltage Adjustment
The actual track voltage supplied by the DB150 can be adjusted. To do this,
you must open the DB150 case (this will not void your warranty).
1. Open the DB150 case. Remove the black screws on the top and bot-
tom of the case and slide the gray front panel off. Be careful to
avoid disturbing components other than the ones described below.
2. Locate the small yellow trimmer potentiometer behind the LocoNet B
Jack and Scale Switch.
3. Use a small screwdriver to turn the potentiometer clockwise to
increase the scale voltage setting. Turn it counter clockwise to
decrease the voltage setting.
4. To determine the actual track voltage, measure the DC voltage
(unloaded) from either the RAIL A or B Terminal to the green
ground wire on the case. Multiply the measured voltage by 2 to
Scale
Max Track Voltage
N
12 volts
HO
15 volts
O/G
20 volts
O / G
N
H O
S C A L E
M O D E
O
R U N
S L E E P
P
M O D E
O
R U N
S L E E P
P
M O D E
O
R U N
S L E E P
P
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