Chassis Placement (Continued); Output Range Configuration; External Sense Wiring - Pacific 110ACX Operation Manual

3.1

CHASSIS PLACEMENT (continued)

Once the unit has been removed from its shipping container, select an appropriate location for the
unit. Key points to consider when locating the chassis are:
1. PROXIMITY TO THE LOAD - The power source should be located as close to the load as
possible. This helps to reduce distribution losses. These losses increase as the output
frequency increases.
2. VENTILATION - The chassis requires good ventilation to adequately cool the internal
components. Airflow should allow 240 CFM. The air intake is located on both sides near
the front. A minimum clearance of two inches on each side and 12 inches to the rear is
required for proper operation.
When the unit is placed in a 19 inch rack, it must be supported by either chassis slides or full depth
angle brackets. The front panel alone will not support the weight of the chassis. Chassis slides
are available from Pacific Power Source as a cost option. Call factory service for details.
After the location for the chassis is selected, verify that the input voltage of the power source is
correct. Input voltage is stated on the system ID label.
After the input voltage form has been verified as correct, slide the chassis into the rack or set it into
its final position. Make input and output connections as stated in paragraphs 3.3 and 3.4,
respectively.
If either the Remote Interface (GPIB or RS-232) or External Sense feature is to be used, refer to
paragraphs 3.5 and 3.7 for connection
Before activating the ACX output, check that the output voltage is correct to prevent possible
damage to any attached equipment.
3.2

OUTPUT RANGE CONFIGURATION

The ACX is a dual-range power source. The output voltage range is selected by the FORM
setting selected in the UPC controller. See the UPC Series Operation Manual for setup. The
standard output configurations are:
FORM 1: 0 – 150 Vac
FORM 2: 0 – 300 Vac
AMPS TO VOLTS RATIO:
For accurate current meter display, the Amps to Volts Ratio Setting of the UPC is always set to 5
for the Model ACX. Refer to the UPC Series Operation Manual for details.
SECTION 3
21
INSTALLATION