Guralp Systems Limited
MSH-EAM-0004 - CMG-EAM-R Quick-Start Guide

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1. Introduction 2. Getting started 3. Connector pin-outs 4. Revision history

Section Index: 3.1. Front panel 3.2. Rear panel

Chapter 3. Connector pin-outs

3.1 Front panel

3.1.1 Console

This is a standard DE9F (TIA-574) sub-miniature (D-sub) socket, conforming to DIN 41652 and MIL-DTL-24308. They are very widely available, as are suitable mating connectors.

The console port operates at 38,400 Baud with 8 data bits, no parity bit and one stop bit. Hardware and software flow-control are not used. These settings can not be changed in the firmware, so that access to the configuration system can be gained via this port if all other routes are unavailable.

Pin

Function

1

not connected

2

RS232 TxD

3

RS232 RxD

4

not connected

5

Ground

6

not connected

7

not connected

8

not connected

9

not connected

Wiring details for the compatible plug, DE9M, as seen from the cable end (i.e. during assembly).

3.2 Rear panel

3.2.1 Power

The power connector is a Switchcraft 712A 2.5mm barrel connector wired with the tip +ve and the shield -ve. A 7-28V DC regulated supply must be used. There is some variation amongst connectors labelled “ 2.5mm barrel” so it is recommended that mating connectors are purchased from GSL.


3.2.2 Time

This is a standard DE9F (TIA-574) sub-miniature (D-sub) plug, conforming to DIN 41652 and MIL-DTL-24308. They are very widely available, as are suitable mating connectors.

Pin

Function

1

not connected

2

NMEA data

3

not connected

4

not connected

5

Ground

6

not connected

7

not connected

8

One-pulse-per-second (PPS) timing signal

9

not connected

Wiring details for the compatible plug, DE9M, as seen from the cable end (i.e. during assembly).

3.2.3 Data

This is a standard DE9F (TIA-574) sub-miniature (D-sub) socket, conforming to DIN 41652 and MIL-DTL-24308. They are very widely available, as are suitable mating connectors.

Pin

Function

1

not connected

2

RS232 TxD

3

RS232 RxD

4

not connected

5

Ground

6

not connected

7

not connected

8

not connected

9

not connected

Wiring details for the compatible plug, DE9M, as seen from the cable end (i.e. during assembly).

3.2.4 Ethernet

The ETHERNET connector is a standard 8P8C modular socket, conforming to TIA/EIA-568-B. It is compatible with 10Base-T or 100Base-TX twisted-pair connectors.

Pin

Function

1

Tx+

2

Tx-

3

Rx+

4

Not connected

5

Not connected

6

Rx-

7

Not connected

8

Not connected

3.2.5 USB

The USB connectors are standard USB type A sockets with conventional wiring. Suitable mating connectors are widely available.

USB connections are very sensitive to wiring details so it is recommended that ready-made cables are used where possible. When used with a CD24-R8, Type A to Type B cables are required.

PreviousNext

1. Introduction 2. Getting started 3. Connector pin-outs 4. Revision history