Installing and putting a SINAUT modem into operation
6.3 GPRS/GSM wireless modem MD740-1
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
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6.2.3
Prerequisites for operation
The following requirements must be met to use the SINAUT MD720-3 in terminal mode:
● SIM card of a GSM network provider with activated CSD data service 9600 bps and call
number for data calls
● Availability of a GSM network
6.2.4
Further documentation
You will find further information on the MD720-3 GSM modem on the SIMATIC NET
Manual Collection CD. 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
6.3
GPRS/GSM wireless modem MD740-1
Introduction
This section describes the design of the MD740-1 modem, its connectors and display
elements.
6.3.1
Displays and connectors
The following figure shows the front view of the MD740-1. modem.
1 Connector for 24 V DC power supply
2 Display elements
3 SET button for service functions
4 Antenna connector
5 Display elements
6
9-pin connector X1 (RS-232 female),
only for service purposes)
7 Ethernet connector X2 (female RJ-45)
Front view of the MD740-1. modem
8 Order number of the modem