Pm42 Trip Current - Digitrax PM42 Manual

5.1 PM42 Trip Current

The PM42 factory default for trip current is set at 3 amps. This is the current
that all Digitrax boosters can provide briefly under fault conditions with ade-
quate track wiring. A 3 amp trip current will work for most boosters and lay-
outs. If you have many locomotives running or other large power draws in a
sub-district or you need to use currents higher than 3 amps, you can modify the
current threshold for all four sections of the PM42 to any value between 1.5
amps and 12 amps, in increments of approximately 1.5 amps. Simply change
option switches 01, 02 and 09 according to TABLE III to adjust PM42's trip
current for optimal operation on your layout.
TABLE III: PM42 Trip Current Setting OpSws
OpSw
OpSw 01
(OpSw 09 = t)
OpSw 02
(OpSw 09 = t)
Trip Current
(approx.)
OpSw 09
Trip Current
(approx.)
Setting Setting
t c
t t
3 amps 6 amps
c c
1.5 amps 4.5 amps
10
Setting Setting
t c
c c
9 amps 12 amps
c c
7.5 amps 10.5 amps