Guralp Systems CMG-1T - Manual (Page 27)

Operator’s Guide CMG-1T Ocean Bottom
Seismometer
September, 1999, Issue C Section 7,
Page 1
7. SYSTEM INPUT OUTPUT SIGNAL FORMAT AND
CONNECTIONS.
The seismometer system outputs consist of the following:
a) Velocity output.
b) Mass position outputs.
c) Control command serial input/output.
d) Calibration signal.
e) System power supply.
The pin assignments for the sensor systems 37-way D type connector are shown
in the photograph below.
Allocation of the pins is as follows:
20 V+ Velocity
23 V- Velocity
24 N+ Velocity
21 N- Velocity
22 E+ Velocity
25 E- Velocity
4 V Mass Position
5 N Mass Position
6 E Mass Position
8 Signal Ground
10 Calibration Signal
30 Calibration Enable
36 +Ve Sensor Power
Continued ..........
33 +Ve Bowl/SOH Power