Guralp Systems Limited
MAN-MIN-0001 - Güralp Minimus - Technical Manual

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1. Preliminary Notes 2. System Overview 3. System description 4. Getting started 5. Advanced system configuration 6. GüVü app 7. Advanced troubleshooting 8. Appendix 1 – Instrument/channel names 9. Appendix 2 – Minimus ports 10. Appendix 3 – Güralp Discovery installation 11. Appendix 4 – Connector pin-outs 12. Revision History

Section Index: 11.1. Ethernet 11.2. Power 11.3. GPS/serial 11.4. Digital 11.5. Analogue

Chapter 11. Appendix 4 – Connector pin-outs

11.1 Ethernet

This is an Amphenol RJField-series 8P8C connector. It consists of a standard ISO 8877 8P8C modular socket (often called RJ45) in a bayonet mounting compatible with MIL-DTL-26482 (formerly MIL-C-26482).

Pin

10BASE-T & 100BASE-TX

1000BASE-T

1

Transmit Data +

BI_DA +

2

Transmit Data -

BI_DA-

3

Receive Data +

BI_DB+

4

not connected

BI_DC+

5

not connected

BI_DC-

6

Receive Data -

BI_DB-

7

not connected

BI_DD+

8

not connected

BI_DD-

This connector accepts unmodified ISO 8877 8P8C modular connectors (often called RJ45 connectors or Ethernet “Cat 5/6” connectors).

When used in hostile environments, a standard Ethernet cable can have a mating environmental shield (Amphenol part number RJF6MN) fitted.

11.2 Power

This is a standard 4-pin military-specification bayonet plug, conforming to MIL-DTL-26482 (formerly MIL-C-26482).

Pin

Function

A

Ground

B

10-36 V DC input

C

not connected

D

not connected

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

Caution: Observe the correct polarity when connecting the power supply. The red lead (from pin B) must be connected to the positive terminal, typically labelled ‘+’, and the black lead (from pin A) must be connected to the negative terminal, typically labelled ‘-’. An incorrect connection risks destroying the digitiser, the power supply and any connected instruments.

11.3 GPS/serial

This is a 14-pin LEMO EEG.1K socket. Suitable mating connectors can be found in the LEMO FGG.1K.314 range.

  • To engage the mating connector, line up the red marks and push firmly home.

  • To disengage, hold the mating connector by the gnarled outer sleeve and pull steadily.

Pin

Function

1

Ground

2

not connected

3

Ground

4

Debug (serial) receive

5

Debug (serial) transmit

6

not connected

7

GPS power

8

GPS pulse-per-second signal – positive

9

GPS receive- positive

10

GPS transmit – positive

11

GPS transmit – negative

12

not connected

13

GPS pulse-per-second signal – negative

14

GPS receive – negative

Wiring details for the compatible plug, FGG.1K.314.*, as seen from the cable end (i.e. when assembling).

11.4 Digital

These are standard 10-pin military-specification bayonet sockets, conforming to MIL-DTL-26482 (formerly MIL-C-26482).

Pin

Function

A

Ground

B

Power

C

RS422 serial transmit - positive

D

RS422 serial transmit - negative

E

RS422 serial receive - negative

F

not connected

G

not connected

H

not connected

I

not connected

J

RS422 serial receive - positive

Wiring details for the compatible plug, ***-12-10P, as seen from the cable end (i.e. when assembling).

11.5 Analogue

This is a standard 26-pin male military-specification bayonet plug, conforming to MIL-DTL-26482 (formerly MIL-C-26482).

Pin

Function

Pin

Function

A

Vertical Acceleration/Velocity – differential non-inverting input

P

Calibration signal (all channels)

B

Vertical Acceleration/Velocity – differential inverting input

R

Calibration enable – vertical channel

C

N/S Acceleration/Velocity – differential non-inverting input

S

Calibration enable – N/S channel

D

N/S Acceleration/Velocity – differential inverting input

T

Calibration enable – E/W channel

E

E/W Acceleration/Velocity – differential non-inverting input

U

Centre

F

E/W Acceleration/Velocity – differential inverting input

V

Aux sensor input – differential non-inverting (or single) input

G

Vertical mass positions

W

Unlock

H

not connected

X

Lock

J

N/S mass positions

Y

Logic – ground*

K

BUSY line

Z

Sensor RS232 transmit

L

E/W mass positions

a

Sensor RS232 receive

M

Auxiliary sensor input – differential inverting input

b

Power – ground*

N

Signal – ground*

c

Power – positive

* “Powerground”, “Signalground” andLogicground” are all connected together internally and also connected to the digitizer case.

Wiring details for the compatible socket, ***-16-26S, as seen from the cable end (i.e. when assembling).

PreviousNext

1. Preliminary Notes 2. System Overview 3. System description 4. Getting started 5. Advanced system configuration 6. GüVü app 7. Advanced troubleshooting 8. Appendix 1 – Instrument/channel names 9. Appendix 2 – Minimus ports 10. Appendix 3 – Güralp Discovery installation 11. Appendix 4 – Connector pin-outs 12. Revision History