Module A-151 (quad sequential switch) is like an electronic four-position rotary switch.
It includes trigger and reset inputs, four in / outputs, and a common out / input. Each time a pulse is received at the trigger input socket, the common out / input is connected to the next in / output. After the fourth in / output, the next trigger makes it step back to the first again, and so on. A positive pulse at the reset input switches the out / input immediately back to the first in / output voltages in the range -8v-+8v at the o/i resp. I/O sockets can be processed by the module.
Four LEDs indicate the active in / output (ie. the on that is connected to the out / input at any particular time).
This module has a maximum current draw of 20ma. It requires 4 te/hp worth of space to fit in a eurorack frame.
This module is lightly used and works great. It ships the next day with the box.