Guralp Systems CMG-DM24 - Manual (Page 53)

Operator’s Guide DM-24 Digitiser
Issue G January 2003 51
7. SYSTEM POWER REQUIREMENTS
Any part of the sensor system can be operated from a 10 to 36 Volts DC power supply.
Power reversal protection is provided in all the sensors, digitizer modules and SAM
units.
The typical power supply current requirement at 12 Volts is:
CMG-3T
75mAmps (400 mAmps locking/unlocking/centring)
CMG-3ESP 75 mAmps (400 mAmps centring)
CMG-40T 50 mAmps
CMG-DM24 125 mAmps
CMG-GPS 80 mAmps
CMG-SAM 200 mAmps continuous (no disk power surge due to
power management)
The given power supply current requirements are a guideline. There are many factors
which can influence the power consumption of the sensor system, for this reason it is
recommended that the user should budget more generously when choosing power
supplies than the given typical values.
The listed power supply consumptions should be checked against the supply
requirements given in the calibration documents.
A dc-dc converter is used within each module of the system
(sometimes more than one dc-dc converter is used within a module)
and it is generally recognised that the start up current of such dc-dc
converters can be a factor of 5 to 8 times larger than the quiescent
currents given above.
NOTE