Guralp Systems CMG-DCM build <10,000 - Manual (Page 16)

Acquisition Modules and Platinum Firmware Equipment Overview
hard drive. The low power consumption and high storage capacity of the
CMG-EAM makes it ideal for this purpose.
Where appropriate, the battery supply can be augmented with a solar panel.
The CMG-EAM is capable of interfacing with and monitoring many types of
solar charge controller.
If it is desired to contact an acquisition module for monitoring or urgent data
download purposes, the unit can be fitted with a GPRS or satellite modem,
allowing remote connectivity.
2.6.2 Protocol Converter
An acquisition module can be deployed as a protocol converter: the wide
variety of output formats and connectivity options make it ideal for this
application. In the illustration below, a digital instrument's GCF output is
retransmitted as SEEDLink data over Ethernet.
2.6.3 Array Concentrator
The acquisition module can combine the data from many instruments in an
array and retransmit them over a single link (serial or network).
MAN-EAM-0003 16 Issue E - February 2014