XPLC3264E Controller Manual
7
2.2.1
Power / CAN interface signal:
Pin
number
name
Explanation
1
GND
Internal power
ground
2
CANL
CAN differential
data
3
EARTH /
SHIELD
Safety ground /
shield
4
CANH
CAN differential
data +
5
+ 24V
Internal power
supply 24V input
Please separate the internal power supply 24V and external IO power supply 24V,
especially in the case of serious electromagnetic interference on site,
Two must be used 24V power supply, or a power supply that can provide two
isolated 24V outputs; when the touch screen is connected through a serial port,
the power supply of the touch screen is provided by the internal power supply
24V.
For communication quality, please use twisted-pair shielded wire, the shielding layer is
grounded.
A power supply. When the controller and expansion module are powered by different
power supplies: controller power supplyGND Connect the GND of the power supply
of the expansion module, otherwise the CAN bus may be burned.
When multiple controllers or IO boards are connected on the CAN bus, a
120-ohm resistor must be connected in parallel between the CANL and CANH
terminals on the two sides.
2.2.2
RS232 interface signal:
