38 XN-322-2SI-RS serial interface specialty module
38.3 Wiring topic
XN300 slice modules 02/24 MN050002EN Eaton.com 314
38.3 Wiring topic
One or two RS-232 interfaces can be wired to connector X1.
X2 and X3 are internally connected to each other and can be wired as a single
RS-485 interface.
Shielded twisted pair cables must be used when wiring data cables.
The XN-322-2SI-RS XN300 slice module features two spread resistors and a
termination resistor that can be activated through the software.
External spread and termination resistors can be used. If you do this, make
sure not to activate the internal resistors with the application anymore.
Maximum number of RS485 participants: 32 nodes
Maximum length: 500 m; the cable length is the complete length, including
all stubs.
38.3.1 RS485 interface
Figure 176: Wiring for an RS-485 interface with the internal termination resistor
PE
0 V
24 V
Rx Tx CT
RT GG
AB
RS485
AGBAGB
X1 X2 X3
120 Ω 1 kΩ 1 kΩ
U
BP_5V
GND
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