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4. External connections
4.5 Serial interfaces for communication with PLCs or devices
4.5.2 COM2 RS-485
The RS485-The interface is not electrically isolated.
CAUTION
NON-GALVANICALLY-ISOLATED INTERFACES
The XV-363 may be damaged by potential differences.
The GND terminals of all bus modules must be connected.
Do not connect the connector to the XV-363 or disconnect it
without first de-energizing the system.
SUB-D plug
PIN
signal
Description
9 pole
1
2
3
4
5
6
9
8
7
1
n.c.
not used
2
n.c.
not used
3
B
Line B
4
n.c.
not used
5
GND
Ground
6
5 V
Output for external bus termination
7
A
A cable
8
n.c.
not used
9
n.c.
not used
Plug housings
GND
Functional earth
Tab. 12: Pin assignment COM2 RS-485, not galvanically isolated, SUB-D plug 9-pole, UNC nuts for interlocking
n.c.: PIN 1, 2, 4, 8 and 9 must not be connected.
Pin 6 (5 V) must not be used as a power supply for external devices.
4.5.2.1 Wiring topic
l
Screened twisted-pair cables must be used.
l
The maximal baud rate depends on the cable length.
Rated cable impedance
120 Ohm
Permissible impedance
108 … 132 Ohm
Max. cable length
1200 m
Possible baud rates
9600 Bit/s
19200 Bit/s
38400 Bit/s
57600 Bit/s
115200 Bit/s
Tab. 13: Specifications for RS-485 wiring
When preparing connections, ensure that the cable shield has a low
impedance connection with the connector housing.
52
XV360 Single Touch Display
07/19 MN048025EN www.eaton.eu