16
4.1
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 use of an external power supply is necessary as the USB port
is not intended to be used as power source.
2
The supply voltage VCC required by the modem is 5V - 32V DC. Please note that applying 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 5.1 Switch ON the modem 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 as long as antenna interface
and the user’s application are unused or connected to separate grounds.
Figure 4: RJ11 Pin Connector
PIN
Signal
Direction
Limits
Description
1
VCC
Input
5 – 32V
Positive power input, DC
2
ADC_IN
Input
0-32V
Analogue Input
3
EMERG_OFF
Input
5 – 32V
Active high control line used to
switch off the terminal
V
IH
> 5V, V
IL
< .5V
Power off: t >1s
4
TO_IN
Input
5 – 32V
Positive edge triggered signal;
used to switch on the modem
V
IH
> 5V, V
IL
< 0.5V
Power on: t >1s after VCC
available
V
IH
= Volt Input high
V
IL
= Volt Input low
2
This Statement does not apply to the USB Host Powered version of the CT63 NG.
