Kinco AX500 User Manual

RS485 Bus Wiring
When configuring the RS485 communication interface for the AX500 series programmable controller,
ensure the following:
Three Cables: Make sure the on-site RS485 bus includes three cables, namely 485A, 485B, and GND.
Correct Wiring: Check whether the wiring terminals are connected incorrectly or reversed. Ensure
that 485A and 485B are not reversed, and GND is correctly grounded.
Use of Shielded Cables: If using shielded cables, ensure that the shield layer is connected to the GND
terminal.At any node or midway point, besides connecting the shield layer to the GND at the node, it is
prohibited to connect the shield layer to any other location (including the on-site casing, equipment
grounding terminal, etc.).
Cable Specifications: For cables with lengths exceeding 3 meters, it is recommended to use AWG26
or thicker cables to reduce cable attenuation.It is advised to always use twisted pair cables to connect
485A and 485B, reducing electromagnetic interference and improving signal quality.
 Recommended Cable 1: Multi-core cable with twisted pairs. Use one pair of twisted wires for
connecting 485A and 485B, and twist the rest together to form the GND connection.
 Recommended Cable 2: Shielded twisted pair cable. Use the twisted pair for connecting 485A and
485B, and the shield for the GND connection.
RS232 Bus Wiring Description
Description of RS232 Pin is as follows:
RS232
232R
232T
GND

Kinco AX500 Specifications

General

Brand	Kinco
Model	AX500
Category	Controller
Language	English