Communication module – ADLINK ND-6067 User Manual
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Communication Module
2.1 Overview of ND-6520
ND-6520 is a RS-232 to RS-422/RS-485 converter, it converts the RS-232
signal to the RS-422/RS-485 signals. The ND-6520 can be considered as an
extension RS-422/RS-485 serial port for the host computer. A standard 9-pin
D-type connector is used to connect the host computer and the ND-6520.
Hence, the ND-6520 can connect with all kinds the PC, IPC or Notebook PC,
which install a standard RS-232 interface.
2.1.1 Features of ND-6520
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RS-422/RS-485 transceiver
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Differenial 4-wire full-duplex RS-422
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Differenial 2-wire half-duplex RS-485
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Easily setup and installation
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Auto direction flow control
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Maximum 128 modules on a bus without using repeaters
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Maximum 256 addressable modules.
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High transfer speed