User Manual

1) To gain access, (Disconnect power from the unit before opening) remove the 5 outer black
hexagonal head screws retaining the connector plate as shown in Figure #4. Then remove the
4 screws surrounding the connector. This will enable the removal of the front panel.
2) After removing the screws, lift the panel to expose the internal components as shown.
Figure#5 shows the adjustments and their locations
With P/N ATC 30
Replace Fuses
ATC 30
1
2
3
jumper 2,3 - Unit ON
jumper 1,2 - ON by Remote Pin
Output Voltage
Adjustment
jumper
P1
CON1
F1,2
Figure 5
Accessible Adjustments:
A) Output voltage is trimmed by adjusting the potentiometer P1.
B) Remote “Turn On” Disabled: Units are shipped from factory with pins 2 and 3 of the
connector [CON1] jumpered as shown. This programs the unit to be “ON” when source power
is applied.
C) Remote “Turn On” Enabled: To program the unit for remote enable, shift the jumper from
pin positions 2 and 3 of [CON1] to positions 1 and 2. In this mode the unit will energize when
pin H is connected to the negative input line pin F.
D) Fuse Replacement: In the unlikely event that fuses F1,2 will open, disabling the unit, DO NOT
CHANGE FUSES WITH THE POWER APPLIED. In order to restore normal operation, the
user will need to ensure that the cause of the failure has been removed. Then the blown fuses
need to be removed by gently prying them out of their clips and replacing them with ones of
identical ratings. Notwithstanding the above the user should take every precaution to ensure
that a reversed polarity input is avoided. Any polarity reversals may result in permanent
damage.
Page 3
Figure 4