PSX-AR Manual Rev: P Software Rev: N
16
J. CV Settings
CV49 – sets the current trip value. If CV49=0, then the Trip Current jumpers on J6 are
enabled. Remember to use either the Jumpers or the CV settings, NOT BOTH!
Low Power System Trip Current Settings:
• For the Digitrax Zephyr [DCS50 & DCS51], setting values of CV49=01 or
CV49=02 is OK.
• The NCE Power Cab should use a value of CV49=01.
• Most 5 amp boosters should be happy with CV49=03 or CV49=04.
• The default current is 3.81Amps.
CV50 is the block detection source selection.
• CV50=0 selects block current as the parameter to activate the Block Occupied
[J4-3 and J4-4] output. See CV54.
• CV50=1 will use the photocell to activate the Block Occupied output when the
photocell is covered. Note the photocell is self-calibrating & will adjust itself to
the ambient light level at the time the unit is turned on. [See CV66 and CV67].
• The CV50 default is 0.
CV52 is the power on phase of the PSX-AR output
• CV52=0 Selects “normal” phase at power on [output in phase with input]
• CV52=1 selects “reverse” phase at power on [output is out of phase with input].
• 0 is the default value for CV52
CV53 Digitrax configuration enable
• CV53=0 uses standard parameters [Default value].
• Any other value: the PSX uses algorithms designed to work most effectively
with Digitrax equipment. Installing the Digitrax jumper J7-3 to J7-4
automatically sets CV53=1.
CV54 sets the current level at which the PSX-AR turns on the Block Occupied output. This
allows you to set a level above the leakage current on the track to prevent false indications.
• Valid CV54 values are 0 to 212 [4mA to 51mA].
• CV54 default is 0, this will turn the Block Occupied output on at 4mA block current
• Each increment [+1] of CV54 will increase the Block Occupied trip point by
approximately 0.22mA
CV55 determines the time between the occurrence of an over current condition [e.g. short
circuit] and the changing of the output polarity. After reversing, the PSX-AR checks that
the reversal solved the short circuit condition. If it did not, then the circuit breaker function
is initiated and the output turns off. Hence the CV55 value determines a delay in both the
reversal time and the trip time.
• CV55=0. The PSX-AR trip time is equivalent to a fast blow fuse. The output will
reverse in less than 1ms after the over current condition occurs.
• CV55=1 The PSX-AR will insert a delay between the time the over current
condition occurs and the output changes polarity. If the current drops below the
trip current set point [CV49] during the delay time, the output will not reverse or
turn off. This is equivalent to the behavior of a slow blow fuse.
• If CV55=1, the length of the delay is determined by CV65.
• The CV55 default is 0 [see CV65 for default delay].
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