Sony Ericsson GM29 manual Electrical Connections, Power Connector

Page 6

Electrical Connections

All electrical connections to the GM29 are protected in compliance with the standard air (4 kV) and contact (8kV) discharge ESD tests, of EN 301 489-1.

The modem uses the following industry standard connectors:

RJ11 6-way (power connector)

RJ9 4-way (audio connector)

SIM card reader

FME male coaxial jack (antenna connector)

Sub-D socket, 9 pin (RS232 serial port)

Power Connector

An RJ11 6-way connector, as shown and described below, serves as a means of supplying and controlling d.c. power to the modem.

Connect positive power to VCC (pin 1) and the ground or negative to GND (pin 6). VCC and GND are reverse polarity and overvoltage protected

NOTE! Application of the supply voltage VCC, does not automatically switch on the modem.

Switch on is usually achieved by use of the TO_IN signal, which can be supplied by the host application. Alternatively the modem can be switched on at the same time that power is applied by hard-wiring TO_IN to VCC. Refer to “Switching On the Modem” on page 10 for information on switch on methods.

Similarly the host application can be designed to switch off the GM29 or perform a hard reboot of the modem's software by use of the HR_IN signal. Refer to “Switching Off the Modem” and “Resetting the Modem” on page 10 for additional information.

TO_IN and HR_IN are referenced to GND.

RJ11 Power Connector

6

5

4

3

2

1

1 VCC

3 HR_IN

5 n/c

2 n/c

4 TO_IN

6 GND

 

 

 

Signal

Description

 

 

 

VCC

Positive power input

 

(5V to 32V d.c. at 1.5 Amax)

TO_IN

Active high control line used for

 

switching on the modem

 

(–0.5V to 32V;

 

 

VIH > 5V, VIL < 2 V)

 

 

 

HR_IN

Active high control line used to

 

switch off or reset the modem

 

(–0.5V to 32V;

 

 

VIH > 5V, VIL < 2 V)

 

GND

Negative power (ground) input

 

and return path for TO_IN and

 

HR_IN

 

 

 

 

 

6 Electrical Connections

Image 6
Contents GM29 Sony Ericsson Mobile Communications International Contents Introduction DescriptionHighlights Installation Safety and Installation InformationSecuring the Modem Power Connector Electrical ConnectionsAudio Connector Antenna ConnectorSub-D 9-pin Connector RS232 Serial PortSIM Card Reader Resetting the Modem Switching On the ModemSwitching Off the Modem OperationSoftware Updates AccessoriesAT Commands TroubleshootingService and Support Service and Support Technical Data Power Supply Average Power ConsumptionRadio Specifications Audio Specifications Electrical Connectors and LEDMechanical Specification Environmental specifications