Table of Contents
Advertisement
3 Mounting and Commissioning
Table 3-14
Pin No.
Operation inter-
face
1
2
RxD
3
TxD
4
–
5
GND
6
–
7
_
8
_
9
–
1)
Termination
The RS485 interface is capable of semi-duplex operation with signals A/A' and B/B'
with the common reference potential C/C' (GND). It is necessary to check that the ter-
mination resistors are connected to the bus only at the last unit, and not at other
devices on the bus. The jumpers for the terminating resistors are on the interface
module RS485 (Figure 3-8) or on the Profibus module RS485 (Figure 3-9). The termi-
nating resistors can also be connected externally (e.g. to the connection module). In
this case, the terminating resistors located on the module must be disconnected.
If the bus is extended, make sure again that only the last device on the bus has the
terminating resistors switched-in, and that all other devices on the bus do not.
Time Synchroniza-
It is optionally possible to process 5–V–, 12– V– or 24–V–time synchronization sig-
tion Interface
nals, provided that they are carried to the inputs named in the following table.
Table 3-15
1)
Connections for the time synchronization interface for panel surface-mounted devices
are described in the appendix.
256
DSUB socket connections for the various interfaces
RS232
Shield (with shield ends electrically connected)
RxD
TxD
A/A' (RxD/TxD–N)
–
GND
C/C' (GND)
–
RTS
CTS
B/B' (RxD/TxD–P)
–
Pin 7 also can carry the RS232 RTS signal as an RS485 interface. Pin 7 may therefore not
be connected!
D-SUB socket assignment of the time synchronization interface
Pin No.
Description
1
P24_TSIG
2
P5_TSIG
3
M_TSIG
4
–
5
SHIELD
6
–
7
P12_TSIG
8
P_TSYNC
9
SHIELD
assigned, but not used
RS 485
Profibus DP Slave,
RS 485
–
B/B' (RxD/TxD–P)
–
CNTR–A (TTL)
C/C' (GND)
–
+5 V (max. load 100
1)
–
A/A' (RxD/TxD–N)
–
Signal Meaning
1)
1)
DNP3.0 Modbus,
RS485
–
–
A
RTS (TTL level)
GND1
VCC1
mA)
–
–
B
–
–
Input 24 V
Input 5 V
Return Line
1)
–
Shield Potential
–
Input 12 V
1)
Input 24 V
Shield Potential
7UM61 Manual
C53000-G1176-C127-3
Advertisement
Table of Contents
