Omron KP100G, Technical Manual

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KP100G
38
8. System Monitoring
Data Communications
The connection type is 1:1 or 1:N. In a 1:N installation, up to 32 units, including the host computer can be connected.
The maximum total cable length is 500 m.
Use a shielded twisted pair cable 0.3 mm
2
.
Use a resistance of 100 to 125
Ω
(1/2 W) in the terminators. Install terminators at both ends of the transmission path, including the host computer.
To connect to an RS-232C port on a computer, use a 232C-485 converter.
Example converter: K3SC (RS-232C-RS-485 Interface Converter)
RS-485 Communications
To communicate with multiple KP100G Units, you can connect them to a personal computer via RS-485 ports. The maximum cable length is 500 m.
RS-485 allows communication with up to 31 Units.
RS-485 communications require a cable of the appropriate length and a personal computer installed with monitoring software.
Baud rate is 9,600bps or 19,200bps. Default value is 19,200bps.
Fig, 8-1 Schematic layout of RS-485 data transmission with several KP100G Units
RS-232C/ RS-485
RS-485
RS-232C
RS-485
RS-232C/ RS-485
RS-485
RS-232C
RS-485
RS-485
NS8
CJ1M
NS8
up to 31 units
up to 10 units
up to 10 units
up to 248 units