The DL351 Modular I/O is a 64-channel I/O unit, which is housed in a 7U, 19” rack mount box. The DL351 Modular I/O can be configured to provide 64 channels of analogue input, analogue output, analogue insert (jack) in and out or 64 AES EBU inputs and outputs. It is of user-configurable1 sub modular construction— allowing the mixing of I/O type, selectable from analogue input, analogue output and AES digital.