Multiples are needed for patching single outputs to multiple inputs and especially for distributing clock/gate source signals to multiple destinations.
In the top section of the panel the 8 jacks are "normalled" together. If a plug is inserted in the jack marked SWITCH the connection between the upper and lower groups of 4 jacks is broken. This forms either a 1x7 or 2x3 mult. The lower section is grouped according to the graphics as 1x3, 1x2 and 1x2.
Current Requirements:
+0mA @ +15V
-0mA @ -15V