CONTROLLER POWER SUPPLY ASSEMBLY

TM 11-6625-3081-23 1-10. DESCRIPTION OF ELECTRONIC STATION (cont) 1-10 d. 488 CONTROLLER POWER SUPPLY ASSEMBLY 1A2 (1) The 488 controller power supply assembly 1A2 consists of a power supply programmer (Kepco Model SNR488-8), interface board, four programmer cards (Kepco Model SN488-B), and drawer slides. The rack cabinet contains front and rear panel controls, indicators, electrical connections, and input power circuit fusing. A ground lead is installed on the rear panel which connects, to a ground lead attached to a ground terminal on the electronic station. The front panel is mounted to a piano hinge and will swing open after loosening two panel screws. (2) The POWER ON switch indicator is accessible with the front panel in either the open or closed position. The card cage contains eight programmer card guide posi- tions accessible from the front. Four card guide positions have programmer cards 1A2A1 thru 1A2A4 installed. The rear panel contains a connector bus distribution for each programmer card, IEEE Std 488 HPIB connection, input power connector, and address selector switch. An interface board is located inside the rear panel. (3) The address selector switch is a six-position rocker switch used to establish either the “listen only” or “addressable” mode and to provide interface address. The preset position for the present configuration is a decimal address of -4. The interface board (an IEEE circuit card) contains a 115/230 vac selector slide switch and a fused circuit. (4) Each programmer card contains two electrically common circuits that convert digital input commands to analog output commands. Included on each programmer card is a 115/230 vac selector switch, a fused circuit, and a three-position address selector switch used to code the location of the programmer card. (5) The purpose of the 488 controller power supply assembly 1A2 is to interface with programmable power supply assembly 1A3 and provides an analog output to the Analog to Digital (A/D) Converter Assembly 2A2A13. Physical Dimensions: Length 19.00 in Width 17.81 in Height 5.22 in Weight 27 lb Electrical Input: 115v ±10v, 60 Hz ±1O Hz 1-15