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$94.00$94.00 -
Advantech
BB-485DRCI
Serial Converter, Converts RS-232 to RS-422/485 Converter, Triple Isolated, C1D2, DIN Rail Mount, DB9F / TB, 10-48VDC External Power Supply Sold Separately
$237.30$237.30 -
Advantech
BB-485OI9TB
Serial Converter, RS-233 DB9F to RS-422/485 TB, 1.5 KV Isolation, DB9 Female / Terminal Block
$109.00$109.00 -
$181.00$181.00 -
$336.00$336.00 -
Advantech
BB-485PTBR
Converter, RS-232 to RS-485, Female DB9 connector with pins 2(RD), 3(TD), and 5(SG) supported, 8-Position Pluggable Terminal Block Connector
$101.40$101.40 -
$89.00$89.00 -
Available Now! 
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$143.00$143.00
These devices connect machines, monitor devices and optimize operations.
An Ethernet switch directs data traffic between the devices connected to it. A gateway allows communication and data exchanges between different networks or protocols.
Modbus is a serial communications protocl that simplifies communication between devices.