Guralp Systems CMG-3T - Manual (Page 47)

Operator's guide
6 Connector pin-outs
6.1 Sensor and control unit pin output
Models with a 26-pin mil-spec plug (02E-16-26P) have the following
pin assignments. The RECORDER and HCU connectors on the breakout
box are connected directly to the SENSOR connector, and therefore
behave identically.
Pin Function
A
Velocity +ve, vertical channel
B Velocity –ve, vertical channel
C Velocity +ve, N/S channel
D Velocity –ve, N/S channel
E Velocity +ve, E/W channel
F Velocity –ve, E/W channel
G Mass position, vertical channel
H RS232 ground (RS232 control interface option)
J Mass position, N/S channel
K BUSY LED
L Mass position, E/W channel
M Power –ve (not used in sensors with internal DC-DC converters)
N Signal ground
P Calibration signal (all channels)
R Calibration enable, vertical channel
S Calibration enable, N/S channel
T Calibration enable, E/W channel
U Centre
W Unlock
X Lock
Y Logic ground
Z RS232 transmit from instrument (RS232 control interface option)
a RS232 receive at instrument (RS232 control interface option)
b Power ground
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