36 Device Description
WAGO I/O SYSTEM 750 XTR
750-8202/040-001 PFC200 2ETH RS TELE XTR
Manual
Version 1.2.0, valid from FW Version 03.01.07(13)
3.3.6
Communication Interface
Figure 8: RS-232/RS-485 – Communication Connection – X3
Table 8: Legend for Figure “RS-232/RS-485 – Communication Connection – X3”
Contact
RS-232 (DCE)
RS-485
Signal
Description
Signal
Description
1
NC
Not assigned
NC
Not assigned
2
RxD (out) Receive Data
NC
Not assigned
3
TxD (in)
Transmit Data
A (Tx/Rx+) Transmit/receive data +
4
NC
Not assigned
NC
Not assigned
5
FB_GND
Ground
FB_GND
Ground
6
NC
Not assigned
FB_5V
Power Supply
7
RTS (in)
Request to Send NC
Not assigned
8
CTS (out) Clear to Send
B (Tx/Rx
−
) Transmit/receive data
−
9
NC
Not assigned
NC
Not assigned
Enclosure Shield
Shielding
Shield
Shielding
If the communication interface is opened as an RS-232 interface, the controller
represents data communication equipment (DCE). The RxD and CTS signals are
sent to the communication partner (out), and the TxD and RTS signals are
received by the communication partner (in).
Incorrect parameterization can damage the communication partners!
The voltage levels are −12
V and +12 V for RS-
232, and −5
V and +5 V for
RS-485.
If the controller interfaces differ from those of the communication partners
(RS-232 <> RS-485 or RS-485 <> RS-232), this may damage the interface of the
communication partner.
Therefore, always ensure that the controller interface matches those of its
communication partners when configuring these items!
DC/DC converters and optocouplers in the fieldbus interface electrically isolate
the fieldbus system and the electronics.