Rigol MC3648 Matrix module
Matrix module for use with M300 DAQ System Mainframe. It is a 4×8 2-wire matrix switch. The M3TB48 is the mating terminal block for this module.
The MC3648 is a 4×8 matrix switch and contains 32 two-wire crosspoints. Each crosspoint relay has its own unique channel label representing the row and column. For example, channel 24 represents the crosspoint connection between row 2 and column 4. This module does not connect to DMM. You can close multiple channels and connect multiple inputs to multiple outputs at the same time.
fitting terminal box: M3TB48