Tecomat Foxtrot – system design
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Interconnection of systems TC700 and Foxtrot via the RS-485 interface
The interconnection of systems TC700 and NS950 by a serial channel with the RS-485 interface is
illustrated on Figure 1.1.6.3. The interconnection assumes two systems and thus the bus termination is
realized on both sides. In case of interconnection of more systems, the termination will be connected only
on the end systems connected to the bus.
PLC1
TC700
PLC2
FOXTROT
C
5
T
x
R
x
–
C
8
T
x
R
x
–
C
2
G
N
D
C
4
B
T
+
C
3
B
T
–
C
6
T
x
R
x
+
C
9
T
x
R
x
+
FOXTROT, CH2
RS485 (MR-0114)
A
3
T
x
R
x
–
A
5
T
x
R
x
–
A
6
G
N
D
A
7
B
T
+
A
2
B
T
–
A
8
T
x
R
x
+
A
1
0
T
x
R
x
+
TC700, CHx
RS485 (MR-0112)
Figure 1.1.6.3 Connection diagram of systems TC700 and Foxtrot with interface RS-485
Connection of system Foxtrot to PC, interfaces RS-232, CH1
If we want to connect the Foxtrot system by a serial channel to a PC (e.g. for programming – if we do not
want or cannot use the ETHERNET interface), we can use the RS-232 interface and the cable connected
as illustrated on Figure 1.1.6.4. The CH1 interface of the Foxtrot basic module is fixed fitted with the RS-
232 interface.
RS-232
CH1
FOXTROT
PC
Dsub 9
(FEMALE)
ZÁSUVKA
PLECH KONEKTORU
(SHIELD)
RxD
2
CTS
8
RTS
7
DSR
6
DTR
4
GND
5
TxD
3
A1
A2
A3
A4
A5
A6
A7
A8
A9
T
x
D
R
x
D
R
T
S
CH1/RS-232
G
N
D
24 V DC
Figure 1.1.6.4 Connection diagram of Foxtrot to PC, interface RS-232, CH1
Module XL-0471 – connection example for Foxtrot, interface RS-485
If we require an interconnection of the Foxtrot communication channels (e.g. realization of a PLC network
with the RS-485 interface) or if we want to connect another device to the communication interface of the
Foxtrot system or if we require increasing overvoltage resistance, we can us the XL-0471 module. The
module has a hub of the RS-485 interface, the through connection (terminal boards A and B) go directly
through the module and the branch (terminal board C) is protected against overvoltage (arresters,
transil).
An example of connection of the module can be seen on Figure 1.1.6.5. At the same time, the module
allows direct connection of cable shielding. The shielding of through branches is interconnected and
brought to the G1 terminal (e.g. for a through cable, the shielding does not need to be grounded on the
module, the shielding of the branch is connected to the G2 terminal, to which also the overvoltage
protection is connected and its connection to the switchgear grounding is assumed (grounding for work).
PC Dsub 9
Female
connector
