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Operator's guide

26 RS232 ground (RS232 control interface option)

In sensors with the RS232 control interface option, the RS232 ground

line (pin 26) is isolated from the other ground lines (pins 4 and 8)

using 10 nF decoupling capacitors.

6.3 Sensor output (waterproof connector option)

Waterproofed models have a 32-pin waterproof connector in place of

the 26-pin output connector. These instruments are supplied with an

adapter cable for connecting to a standard digitizer input.

The pin connections are:

Pin Function

1 Mass position, N/S channel

2 Lock

3 BUSY LED

4 Logic ground

5 Mass position, E/W channel

6 Power –ve (not used in sensors with internal DC-DC converters)

7 RS232 transmit from instrument (RS232 control interface option)

8 Signal ground

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Guralp-systems CMG-3T Bedienungsanleitung Seite 49