Siemens SINAUT ST7 System Manual page 190

Installing and putting a SINAUT modem into operation
5.4 GPRS/GSM wireless modem MD741-1
Pinout of the X2 port
The connector of the Ethernet port is designed as an 8-pin RJ-45 jack. The pinout is shown
in the following table.
Table 5- 7 Pinout of the RJ-45 Western jack for the Ethernet port
Illustration
8
7
6
5
4
3
2
1
There is no standard connecting cable available in the SINAUT range to connect the
MD741-1 to Ethernet. Use the suitable Ethernet connecting cables (for example IE TP Cord)
from the SIMATIC NET product range (catalog IK PI).
Antenna connector
The jack for connecting an antenna cable with an SMA connector is located at the top of the
front panel.
● Impedance: Approx. 50 ohms
Connecting to the power supply
Figure 5-3
The screw terminals at the top are for connecting the power supply source:
● 24 V DC (nominal), I
The two screw terminals on the left (24 V) are connected internally (see Figure). The two
screw terminals on the right (0 V) are connected internally.
190
Pin no.
1
2
3
4
5
6
7
8
CAUTION
Only use antennas from the range of accessories SINAUT Telecontrol intended for the
MD741-1 modem. Other antennas may have detrimental effects on the device
characteristics and may even cause damage.
Connector for 24 V DC power supply
typ
Signal name Signal direction
TXD+
TXD-
RXD+
-
-
RXD-
-
-
360 mA
Output
Output
Input
Input
System Manual, 07/2009, C79000-G8976-C178-07
Remark
Station control system