User manual

9
2 Electrical Description
The modem uses the following industry standard connectors:
 RJ11 6-way (power connector)
 Mini USB (audio)
 SIM card reader
 FME male coaxial jack (antenna connector)
 Sub-D female socket, 9 pin (RS232 serial port)
2.1 Power Connector
An RJ11 6-way connector, as shown and described below, serves as a means of supplying and
controlling DC power to the modem.
The supply voltage, VCC, required by the modem is in the range 5V - 32V DC. Application of
the supply voltage does not switch the modem on. To do so an additional active-high control
signal, TO_IN, must be applied for > 1 second.
Please see chapter “3.1 Switching the modem on” for further important details about TO_IN
and power supply requirements, especially if TO_IN is applied in parallel to VCC.
VCC and GND are reverse-polarity and over-voltage protected.
This does not apply for the GND on the antenna connector if this coax GND /
shield are connected to your applications ground-plane.
PIN 6 5 4 3 2 1
Figure 4: RJ11 Pin Connector