Guralp Systems CMG-3T - Manual (Page 48)

CMG-3T
c Power +ve
In sensors with the RS232 control interface option, the RS232 ground
line (pin H) is isolated from the other ground lines (pins Z and a) using
10 nF decoupling capacitors.
6.2 Sensor output (“D”-type connector option)
As an option, sensors can be equipped with a 26-pin high-density “D”-
type plug in place of the mil-spec connector.
Pin Function
1 Mass position, N/S component
2 Lock
3 BUSY LED
4 Logic ground
5 Mass position, E/W component
7 RS232 transmit from instrument (RS232 control interface option)
8 Signal ground
9 RS232 receive at instrument (RS232 control interface option)
10 Calibration signal
11 Calibration enable, N/S component
12 Calibration enable, vertical component
13 0 V power
14 Velocity –ve, vertical component
15 Calibration enable, E/W component
16 Velocity +ve, vertical component
17 + 10 – 36 V power
18 Velocity –ve, N/S component
19 Centre
20 Velocity +ve, N/S component
21 Factory use only, do not connect
22 Velocity –ve, E/W component
23 Velocity +ve, E/W component
24 Unlock
25 Mass position, vertical component
48 Issue N