Both envelope generators are identical and provide control voltages that can be used for dynamic change of all voltage controlled parameters, such as; frequency, amplitude, pulse width, cutoff.
The most common use is controlling a filters cutoff frequency and a voltage controlled amplifiers amplitude in order to achieve dynamic timbre- and level-changes. All parameters such as attack time, decay time, sustain level, release time and output level are voltage controlled.

The new (from 08-2007) ADSR-VC2 has additional DIP-switches on the back:

GATE dip-switch; switches the Gates to an internal gate bus (Doepfer style frames).
5/8 dip-switch; sets ADSR1&2 output levels to 5 or 8 Volts. The 5 Volts output level is preferable for controlling of other Cwejman modules.

2hp

Power consumption 30mA