CEP AG
Revision 1.2
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Page 6 of 28
2 Electrical Description
The modem uses the following industry standard connectors:
RJ11 6-way (power connector)
Mini USB (audio- / IO- connector)
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 - 36V 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.
Note: 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
Pin
Description
1
VCC
2
ADC_IN (GT864-PY only)
3
HR_IN
4
TO_IN
5
DIG_OUT (GT864-PY only)
6
GND
