Guralp Systems CMG-CD24S6EAM - Manual (Page 5)

CMG-CD24S6EAM Introduction
2 Introduction
2.1 Equipment Overview
The Guralp Systems CMG-CD24S6EAM is an acquisition unit providing a
guaranteed 100ms low-latency Ethernet output with full system redundancy.
Inside each acquisition unit are a pair of CMG-CD24 digitisers, a Lantronix
Wi-port NR Ethernet module and a CMG-EAM communication and control
module.
The CMG-CD24 is an analogue to digital converter that receives signals from
connected seismometers and other devices and feeds the digital output to both
the Lantronix Wi-port NR and a CMG-EAM modules. The Lantronix
Wi-port NR provides a guaranteed 100ms low latency Ethernet output and the
EAM provides Ethernet and serial outputs.
GPS timing is used throughout, there is an internal mass storage device and
protection is provided through GPS and Network surge protectors.
On the front of the acquisition unit is an LCD display which cycles though a
series of status messages such as the IP address and GPS status.
The system architecture is given in section 2.3 on page 5.
2.2 Ports
Note: Refer to Appendix E on page 31 for information on connector
pinouts.
2.2.1 External Ports
There are 8 ports on the back of the acquisition unit. These are described
below.
2.2.1.1 Sensor A and Sensor B
Two 26-pin connectors that provide power to the instruments and accept
analogue signals from connected sensors.
MAN-C24-0003 2 Issue A - May 2011