Guralp Systems Limited
MAN-6TF-0002 - CMG-FLUTE H/OBS - Operator's Guide

Chapter 5. Connector pin-out

5.1 Instrument connector

This is a SubConn MCBH21M-Titanium.

Suitable mating connectors are available from GSL or from SubConn and their distributors.

Pin

Function

Pin

Function

1

Power supply +V

12

Z velocity non-inverting

2

Power supply 0V

13

Z velocity inverting

3

Calibration enable

14

N/S velocity non-inverting

4

Calibration signal

15

N/S velocity inverting

5

Centre (see text)

16

E/W velocity non-inverting

6

Response 0 (see text)

17

E/W velocity inverting

7

Response 1 (see text)

18

Signal ground

8

Busy (active high, 3.3V via 1kΩ)

19

Z mass position

9

Digital ground

20

N/S mass position

10

RS232 transmitted data

21

E/W mass position

11

RS232 received data

Wiring details for the compatible socket, as seen from the cable end (i.e. when assembling).

5.2 CMG-DM24S3EAM/OBS Input connector

This is a SubConn MCBH21F-Titanium.

Suitable mating connectors are available from GSL or from SubConn and their distributors.

Pin

Function

Pin

Function

1

Power supply +V

12

Z velocity + (non-inverting)

2

Power supply 0V

13

Z velocity - (inverting)

3

Calibration enable

14

N/S velocity + (non-inverting)

4

Calibration signal

15

N/S velocity - (inverting)

5

Centre (see text)

16

E/W velocity + (non-inverting)

6

Not connected

17

E/W velocity - (inverting)

7

Not connected

18

Signal ground

8

Busy (active high, 3.3V via 1kΩ)

19

Z mass position

9

Digital ground

20

N/S mass position

10

PortSA1 TxD

21

E/W mass position

11

PortSA1 RxD

Wiring details for the compatible plug, as seen from the cable end (i.e. when assembling).

5.3 CMG-DM24S3EAM/OBS Digital connector

This is a Teledyne MHDXL-12-FCR plug.

Suitable mating connectors are available from GSL or from Teledyne and their distributors.

Pin

Function

1

Power ground

2

PPS + (non-inverting)

3

Digital ground

4

Rx - (eth0 or RS422)

5

Tx - (eth0 or RS422)

6

NMEA - (inverting)

7

NMEA + (non-inverting)

8

Tx + (eth0 or RS422)

9

Rx + (eth0 or RS422)

10

Power +ve (18-75 V DC)

11

PPS - (inverting)

12

Not connected

Wiring details for the compatible socket, as seen from the cable end (i.e. when assembling).