Installing and putting a SINAUT modem into operation
5.4 GPRS/GSM wireless modem MD741-1
Station control system
188 System Manual, 07/2009, C79000-G8976-C178-07
5.3.4 Further documentation
You will find further information on the MD720-3 GSM modem on the SIMATIC NET Manual
Collection (DVD ships with every product). The separate manual on the MD720-3 on this
CD, includes among other things information on the following topics:
● Inserting the SIM card
● Connecting up the device and starting up
● Service functions
You will also find more detailed information on the GSM antenna SINAUT 794-4MR on the
SIMATIC NET Manual Collection.
5.4 GPRS/GSM wireless modem MD741-1
Introduction
This section describes the design of the MD741-1 modem, its connectors and display
elements.
5.4.1 Displays and connectors
The following figure shows the front view of the MD741-1 modem.
1 Connector for 24 V DC power supply
2 SET button for service functions
3 Antenna connector
4 Display elements
5 Ethernet connector X2 (female RJ-45)
6 Order number of the modem
Front view of the MD741-1 modem
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