CSI Channel Switch MUX Adapter

4 Channel Accelerometer Input Multiplexer. Used for connecting four accelerometers simultaneously during a balance job. 25 Pin D-Sub Connector to 4 ea. BNC-F Jack connectors. The 648 is for the CSI 2120/2120A or CSI 2130 analyzers only, not for the CSI 2117/8117/2115-style analyzers.