User guide

EG_GenPro78e_1003_UG_007_UK Page 12 / 41
Description and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modifications.
3.2 External connections
3.2.1 Connections
3.2.1.1 GSM antenna connector
The GSM antenna connector is a 50 impedance female SMA type.
3.2.1.2 4-pins Micro FIT female connector
This connector allows the connection of an external DC supply.
Pin N° Signal
1 +VDC
2 GND
3 NC
4 NC
WARNING
: pins 3 and 4 are not wired. It is strictly forbidden to connect a supply voltage to these pins – the
modem may be damaged.
3.2.1.3 15-pin Sub HD female connector
This connector provides:
- The serial RS232 link,
- The audio line connection (microphone and loud-speaker),
- The BOOT and RESET signals.
Pin N° Description Circuit (V24 – RS232C) I/O
1 Signal detection / Buzzer 109 – DS – DCD O
2 Data transmission 103 – ED – TXD I
3 Boot BOOT I
4 Microphone + MIC2P I
5 Microphone - MIC2N I
6 Data reception 104 – RD – RXD O
7 Data Set Ready 107 – PDP – DSR O
8 Data Terminal Ready 108/2 – TDP – DTR I
9 Ground 102 – TS – GND -
10 Loud Speaker + SPK2P O
11 Clear To Send 106 – PAE – CTS O
12 Request To Send 105 – DPE – RTS I
13 Ring Indicator / 3,8V 125 – IA – RI O
14 Reset RESET I
15 Loud Speaker - SPK2N O
Note : the pin 3 is not used.