CEP AG
Revision 1.2
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Signals of Power Connector
PIN
Signal
Direction
Limits
Description
1
VCC
Input
5 – 36V
Positive power input, DC
2
ADC_IN or
not connected
Input
0 – 36V
- Analogue Input in GT864 PY
- No connection in GT864 Quad version
3
HR_IN
Input
5 – 36V
Active high control line used to switch off
V
IH
> 5V, V
IL
< 0.5V
Power off: 1s < t < 2s
4
TO_IN
Input
5 – 36V
Positive edge triggered signal; used to
switch on the
modem
V
IH
> 5V, V
IL
< 0.5V
Power on: t > 1s
5
DIG_OUT / or
not connected
Output
5 – VCC
max. 36V
- Digital Output in GT864 PY
- No connection in GT864 Quad version
6
GND
Input
-
Negative power (ground) input and return
path for TO_IN and HR_IN
2.1.1 Analogue Input - GT864 PY Variant only
The following command has to be used to initialise and to read the status of the
analogue input:
AT#ADC=1,2,0 or AT#ADC=1,2
Response:
#ADC: <digital value>
e.g. #ADC:
119
ADC_ IN 0,026V x digital value
Examples:
ADC_IN [V]
5V
12V
24V
32V
digital value
192
461
923
1230
