Hardware installation
104275_en_c00
PHOENIX CONTACT
2-11
RS-485 W2/RS-422 interface
In addition to the D-SUB plug, a 6-pos. COMBICON plug is used. The pin assignment is as
follows:
The interface is electrically isolated from all other isolated groups.
In the case of the RS-485 version, the T-BUS DIN rail connector can be used for data trans-
mission. Star structures can also be created (see "Star structure via DIN rail connector and
RS-485 interface" on page 1-12).
T-BUS DIN rail connector
The interface has ground reference and is not electrically isolated from the potential of the
supply voltage.
Table 2-2
Assignment of the RS-485/RS-422 interface (COMBICON)
Contact
RS-485 W2
RS-422
Assignment
1
-
R(N)
2
-
R(P)
3
D(A)
T(N)
4
D(B)
T(P)
5
GND
GND
6
Shield
Shield
RS-232 and RS-422 do not support data transmission via the DIN rail connector. Howev-
er, power supply is possible.
Table 2-3
Assignment of the DIN rail connector (T-BUS)
Contact
Signal
Comment
Assignment
1
24 V
Supply voltage, 24 V
2
0 V
Supply voltage, 0 V
3
GND
Common ground
4
D(A)
Local bus (RS-485 only)
5
D(B)
Local bus (RS-485 only)
In principle, a star structure via the DIN rail connector can only be used in combination
with RS-485 mode.
VCC
DG
RD
TD
LINK
STAT
LINK
DSL
A
B
AL
TERM
RS232
1
2
3
4
5
6
1
2
3
4
5