MODULE 2520 - VOLTAGE SOURCE OUTPUT UNIT

The 2500, 2510, 2520 and 2560 modules perform the basic potentiometer matrix functions of early sequencers. The 2510 is an eight position (3 bit) up/down presetable, cascadable counter; the 2520 is a 4 by 8 potentiometer matrix, and the 2560 is a sequential switch.

The 2520 Voltage Source Output Unit contains four parallel rows of potentiometers. When one of the eight columns is activated (indicated by the corresponding lamp), each of the four outputs will maintain the voltage set by the potentiometer at the row/column intersection. The range of each potentiometer is zero to +10 volts. The selected column is determined by the binary inputs. Columns 1 through 8 will be selected by coded inputs for 0 through 7 respectively, the upper input being the most significant. These inputs will generally be patched to a 2510 address generator. If a logical one appears at the inhibit input, no column will be selected, and all four outputs will go to zero.