The TM2A612, TM series TIME/MODULE consists of a series of modules, each interlocking with the other and keyed so that they can be assembled only one way. Choosing the correct combination of modules will solve virtually all repeating time control problems. Standard units are available with one through ten switches. There are six modules available, each distinctive in its separate function. They include a motor module with clutch, dial and knob module, a 10-1 reduction module, and three different switch modules as follows: one rise and drop tab with latch actuator (standard), two rise tabs with cam follower, and two 50-50 cam segments with cam follower.