Modules
The standard SDS-V was loaded with 5 modules: Bass, Snare and three Tom Toms, which looked almost identical, with controls for noise level, tone level, bend, decay time, noise tone (a simple filter) and click drum control which added extra attack derived from pad impact. Each module's parameters were optimised for the drum it was designed to emulate. Optional Cymbal and Hi-Hat modules were also available with open and closed hi-hats controlled from an external pedal. There was also a mixer section with individual volume control for each module (only into the mono/stereo output) and controls for pad sensitivity.
Outputs were balanced XLRs for live and studio applications (pins 1 & 2 ground, pin 3 hot), however the XLR pad input wiring on the SDS-V was unconventional - the User Manual states that pin 2 is hot and pins 1 & 3 are ground. Each module also had a 1/4" jack trigger input allowing triggering from various sources including the SDS-6 and even audio (for example from a drum machine).
Read more about this topic: Simmons SDS-V