Photron FASTCAM Multi Hardware Manual page 33

4. When disconnecting the camera cables, first shut down the system.
Grasp and slide the grip of the connector, and then disconnect the camera cable.
Camera Cable Connector
 The camera cable has no dedicated orientation: the connector on either end can be connected to
either the Main Unit or the camera head.
Be sure to verify if the camera cable has been correctly and firmly inserted. If the camera cable
is disconnected for any reason while the camera is active, an error will result.
Be sure to shut down the Main Unit before connecting or disconnecting the camera head. If the
camera head is connected or disconnected while the system is powered, an error will result.
19 FASTCAM Multi Hardware Manual