KTI Networks KSC-240 Guida di Installazione Scaricare il pdf (Pagina 40)

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The master node may drive its bus while any of the slave nodes are

driving the lower pair, making this 4-wire network a full-duplex communi-

cation channel. All communication occurs from master to slave or slave

to master, so any peer to peer communications must be routed through

the master node.

To convert an RS-232 device into a Master node in RS-485 4-wire net-

work, the configuration is:

SW1-2&1 4W Select 4-wire topology

SW1-4 TXE Enable Driver always

SW1-6 RXC Enable RTS/ADC Control for Receiver

SW1-5 RTS-E Use RTS control (optional)

SW2-1 SDE Or use ADC control (optional)

SW2-2-8 Baud Baud when ADC control is enabled (optional)

SW1-3 T-D Disable internal terminator (optional)

To convert an RS-232 device into a Slave node in RS-485 4-wire network,

the configuration is:

SW1-2&1 4W Select 4-wire topology

SW1-4 TXC Enable RTS/ADC Control for Driver

SW1-6 RXE Enable Receiver always

SW1-5 RTS-E Use RTS control (optional)

SW2-1 SDE Or use ADC control (optional)

SW2-2-8 Baud Baud when ADC control is enabled (optional)

SW1-3 T-D Disable internal terminator (optional)

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KTI Networks KSC-240 Guida di Installazione Pagina 40