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408XL installation specifications Storage temperature: -40 to +70°C (-40 to 158°F). Operating temperature: 0 to 40°C (32 to 104°F). Weight: kg. Power requirements: 110/220 V, 50/60 Hz, 450 W. Hardware configuration: Every 408XL module is equipped with: • an APPS4 (Power supply), • at least one LCI (Line Controller Interface), • at least one LMP_S (Line Memory Processor and SCSI), • plus a number of LCI/LPM_S board pairs depending on the maximum capacity of the system, as indicated in the table below: Maximum capacity @ 2 ms S.

Xwindow 0311400 is a trademark of Massachusetts Institute of Technology. 1-7 1 1 Introduction The Central Control Unit CMXL The CMXL consists of a 408XL unit and PRM processing software. The major functions performed by a 408XL module include: • interfacing with the field electronics, • generating the Firing Order and sensing the Time Break, • seismic line management and control, • auxiliary line control, • collecting the data from the field electronics, • collecting system status data to be returned to the HCI.

1-7 1 1 Introduction The Central Control Unit CMXL The CMXL consists of a 408XL unit and PRM processing software. The major functions performed by a 408XL module include: • interfacing with the field electronics, • generating the Firing Order and sensing the Time Break, • seismic line management and control, • auxiliary line control, • collecting the data from the field electronics, • collecting system status data to be returned to the HCI. 10 BASE T BLASTER 1 10 BASE 2 SCSI BLASTER 2 RIGHT EXT FUSE LINE POWER TRANS 5 TRANS 4 TRANS 4 TRANS 2 TRANS 1 AUX LINE LEFT 408XL Rear panel 1-8 January 2003 Installation Manual The Central Control Unit PRM software can be installed on the HCI workstation or, for large capacities, on a separate station.