User manual ACOPIAN POWER SUPPLIES-NARROW PROFILE A

[. . . ] If the perforated bottom of a supply is mounted to a solid surface, use spacers at least 3/16" thick between it and the surface to which it is fastened, to permit convection air flow, or punch ventilation holes in the mounting surface. THE SENSING TERMINALS MUST BE CONNECTED to the output terminals, either at the barrier strip on the power supply or at the load. Failure to have the sense terminals connected will affect the output voltage (usually causing it to be higher than the rating of the supply, and unadjustable), and may result in permanent damage to both the power supply and its load. [. . . ] If the AC input power contains large voltage spikes (`noise') induced by the switching of high currents, inductive loads, electro-mechanical components, etc. , the input power leads to the supply should include some means of transient suppression. Otherwise, a portion of the noise may be coupled through the supply to the load. The means of suppression that is easiest to install is a 1 mfd capacitor or a metal oxide surge suppressor (MOV) across the AC input terminals of the supply. In extremely severe cases, the use of RF chokes in series with each side *W 2. 87 of the line may also be required. These power supplies operate as constant voltage sources when used at load current equal to or less than their ratings. If the power supply is overloaded, the current limit circuit will automatically reduce the output voltage, and it will then attempt to recover to its normal operating point. Therefore, A TRANSITORY OVERLOAD RESULTS IN A MOMENTARY DROP IN OUTPUT VOLTAGE. However, if the overload is still present when the voltage attempts to recover, the voltage will continue to alternately drop and recover, which will appear as a sawtooth oscillation of the output. Do not operate the power supply in this mode; reduce the load so that an output current equal to or less than the rating of the supply will be drawn. HEATSINK Voltage Adj. TRANSISTOR L N 1. 68 . 62 1. 31 OUT SENS + +­ ­ OUT AC AC Barrier Strip . 375 (Typ. ) with 6-32 terminal screws . 59 . 58 (max. ) 1. 0 8. 47 L N A L L A C O P IA P L IE S P P O WE R S U . A . A D E IN U . S M WARRANTY: Acopian power supplies are warranted to be free from defects in material and workmanship for a period of five years (encapsulated devices and fans, for one year) from date of original shipment. Acopian's obligation under this warranty is limited to repairing any power supply returned to the factory Service Department in Easton, PA and replacing any defective parts. Authorization must be obtained from Acopian before a power supply may be returned for repair. A reinspection and handling charge will be applied to returned units found to have no defects. If a failure has been caused by misuse, operation in excess of specifications, or modification by the customer, repairs will be billed at cost; in such cases, a cost estimate will be submitted before work is started. Acopian reserves the right to make changes or improvements in its products without incurring any obligation to install the same on products previously manufactured. This warranty is in lieu of all other warranties, obligations, and liabilities, expressed or implied, and is the purchaser's exclusive remedy. [. . . ] All models have floating outputs which may be used floating, with either the positive or negative side grounded, and/or in series with another supply(ies). All have built-in short circuit protection and provision for remote sensing of output voltage at the load for applications where voltage regulation is critical. They are conservatively rated for operation at ambient temperatures to +71°C. Connecting Power Supply to the LOAD: T1 K3 K4 K1 Q1 K2 R13 R12 R25 T Q2 Q3 R3 + +OUT +OUT + SENS R4 K8 R14 K7 + C8 Q4 C6 K6 + OVERVOLTAGE PROTECTOR (optional ) * ­ SENS ­ OUT ­ OUT remote V adj LOAD C5 CW C3 R21 R11 + C7 L AC INPUT + C4 R17 R7 K10 K9 + SENS R16 R18 R8 Z3 ­ SENS *THE DOTTED LINE CONNECTION IS REQUIRED, unless remote voltage adjustment is used. [. . . ]