User`s guide

4000/5000 Modems’ User Guide

number

Name Description

1 GND Ground

2 POS Power supply input 8 to 30 Vdc

3 IGN Ignition sense input – turns ON/OFF the modem

4 O3 Digital Output 3

O3 IGN

GND POS

 Power input to the modem is protected against reverse polarity and over-

voltage.

 The POS input is also monitored by the modem as a dedicated analog input.

The IGN input is also monitored by the modem as a dedicated digital input.

Current consumption

Active mode:

Æ the modem is in a call and is transmitting or receiving data

 Average of 169mA @ PCS 1900Mhz (Peak: 286 mA)

 Average of 154mA @ Cellular 800Mhz (Peak: 268 mA)

Idle mode:

Æ the modem is either not in a call, or is in one but is Dormant

Æ Dormant is the state the modem is in after 20sec of inactivity

 49mA

Ignition OFF:

Æ the modem is turned OFF but still has power from its POS input

Æ all circuitry is shutdowns except for Non-Volatile memory and Real Time Clock

 1mA