Guralp Systems CMG-DCM build <10,000 - Manual (Page 251)

Acquisition Modules and Platinum Firmware Technical operation
The illustration shows a four-channel unit; the seven-channel unit has an
additional connector for sensor B:
The digital connectors are arranged at the other end of the cylinder:
For more information on the ports see section 2.5on page 14. The connector
pin-outs are given in section 14.1.1 on page 218 and listed in the table below:
Port Section
Sensor Section 16.5.12 on page 284
Auxiliary Section 16.5.13 on page 285
Power Section 16.5.9 on page 281
Data Section 16.5.11 on page 283
Net Section 16.5.4 on page 276
GPIO Section 16.5.6 on page 278
USB Section 16.5.8 on page 280
GPS Section 16.5.10 on page 282
MAN-EAM-0003 251 Issue E - February 2014