Siemens SIMATIC S7 Instrucciones Breves página 42

PC/TS Adapter
As the adapter receives its power supply via the MPI/DP in-
terface, only those interfaces can be used which provide
24 V DC and 5 V DC with the voltages and currents specified
in the table in the "Technical Specifications" (Chapter 7).
Therefore a connection at the free end of a PROFIBUS cable
is not possible.
9-pin subminiature D: Adapter
1
DCD
RS232
2 RXD
3 TXD
4
DTR
5
GND
6 DSR
7
RTS
8
CTS
9
RI
CMOS
S1 ACTIVE POWER
PC potential area S7/M7/C7 potential area
Figure 1-7 Block Diagram of the Adapter
The adapter provides electrical isolation between its MPI/DP
interface and RS232 interface within a safety extra-low
voltage (SELV) circuit, thus allowing direct operation even on
ungrounded S7/M7/C7 systems.
RS232 side:
S
See Figures 1-1/1-2 "PC/TS Adapter in the System" for
direct connection details. An RS232 cable is required to
connect a PC/programming device to the adapter's
RS232 interface (COM2-PC-compatible). This cable must
be ordered separately (see Point 3 "Accessories").
8
Quick Reference Guide
9-pin subminiature D:
50mA (typ)
P24V
+5V
M24V
40mA (typ)
P5V
M5V
RTSAS
RTS_PG
LTG_A
LTG_B
PC/TS Adapter
A5E00078070-03
7
2
6
5
4
9
8
3