Product description
Application Module FM 458-1 DP - User Manual 2-35
A5E01078222-02 Edition 03.2009
2.3.4 Connection possibilities
EXM 448
LE-BUS
SIMATIC P-BUS
9 pin
Connector assignments:
RS 232 (download)
TxD = 2
RxD = 7
Grd = 1
RS 485 (PROFIBUS)
+Tx/Rx = 3
-Tx/Rx = 8
Ground 5Vexternal = 5
5Vexternal = 6
PROFIBUS-DP
MASTERDRIVES-
option module
Fig. 2-7 Connection possibilities for the communications expansion module
EXM 448
An additional expansion module (EXM 438-1 or
EXM 448/EXM 448-2) can be inserted at this 5 x 24 pin socket connector.
The 5 x 17 pin socket connectors is used to connect to the SIMATIC S7
backplane (only power supply).
The following connections are provided at the 9-pin sub-D socket:
PROFIBUS interface with RS 485 format with electrical isolation
(floating)
Parameterizing- and diagnostics interface with RS 232 format to
download the bus configuration
5V power supply for the Optical Link Module (OLM)
with electrical isolation
Connecting
diagram
LE-bus connection
P-bus connection
PROFIBUS-DP (X1)
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