Installing and putting a SINAUT modem into operation
5.3 GSM/GPRS modem MD720-3
Station control system
System Manual, 07/2009, C79000-G8976-C178-07
185
LED Status Description
Q (Quality) Flashes slowly
Flashes once at intervals
Flashes twice at intervals
Flashes three times at intervals
Always ON
OFF
Logging into GSM network
Field strength inadequate
Field strength adequate
Field strength good
Field strength very good
Waiting for PIN
C (Connect) Flashing Terminal mode activated
Flashes slowly: once per second; flashes fast: four times per second
Pinout of the X1 port
The X1 port is designed as a 9-pin D-sub miniature female connector. The female connector
can be changed to male with the supplied "pin" gender changer. As an RS-232 port, the
pinout corresponds to that of a standardized PC connector.
Table 5- 2 Pinout of the X1 RS-232 connector
Illustration Pin no. Signal name Signal direction Remark
1 DCD Output
2 RXD Output
3 TXD Input
4 DTR Input
5 GND
6 DSR Output
7 RTS Input
8 CTS Output
9 RI / T Output
Standard connecting cable for the X1 port
The TIM module is connected to the RS-232 X1 connector (female with pin gender changer).
The following standard connecting cable is available.
Table 5- 3 Standard connecting cable for the RJ-232 port
Order no. Description Illustration
6NH7701-5AN Cable for connecting
• the GSM modem MD720-3 (X1 port) with a TIM 3V-IE
/ TIM 4 (RS-232) for data transmission
or
• the GSM modem MD720-3 (X1 port) with a PC (serial
port / COM port) for configuration and service
Cable length 2.5 m
*60
PRGHP
7,0
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