Inovance AC800 Series - RS232 Bus Wiring Instructions; Wring of Network Ports

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5 Wiring
AC800 Series Intelligent Machine Controller Hardware User Guide
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Figure 5-11 Star
Terminal wiring
The controller provides three terminals (485+, 485- and GND) for RS485 communication. Ensure that the
RS485 bus contains three cables, and the terminals are connected correctly. If you are using shielded
cables, the shielding layer must be connected to the GND terminal, rather than any other location
(including housings and equipment ground terminals).
Due to the attenuation e󶍽ect of the cable, it is recommended to use AGW26 or thicker cables for a
connection length greater than 3 m. it is recommended to connect the 485+ and 485- terminals with
twisted pair cables.
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a Multi-core unshielded cable b Twisted pair shielded cable
Figure 5-12 Terminal wiring diagram
■ Recommended cable 1: Multi-core cable with twisted-pair cables. One pair of twisted-pair cables are
connected to 485+ and 485- terminals, and the other are twisted together as the GND cable.
■ Recommended cable 2: Shielded twisted-pair cable. The twisted-pair cable is used for 485+ and 485-
terminals, and the shield is connected to the GND.
NOTE
The shield must only be connected to GND, not to the 󶍾eld ground.
5.3.4 RS232 Bus Wiring Instructions
When you use an RS-232 to RS-485 converter, it is recommended to use an external power supply to
power the converter. external power supply is unavailable, the baud rate should not exceed 9.6 Kbps.
5.5 Wring of Network Ports
The controller provides 4 Gigabit network ports, which are described as follows:
No. Port Function
1 LAN A
Programming port (used for
downloading and monitoring)