The converter features RS-485 driver and receiver in one device. It also provides very flexible configuration settings for Driver Enable control and Receiver Enable control. The configuration for the node in RS-485 2- wire network is:

SW1-2&1

2W

Select 2-wire topology

SW1-4

TXC

Enable RTS/ADC Control for Driver

SW1-6

RXC

Enable RTS/ADC Control for Receiver

SW1-5

RTS-E

Use RTS control (optional)

SW2-1

SDE

Use ADC control (optional)

SW2-2-8

Baud

Baud when ADC control is enabled (optional)

SW1-3

T-D

Disable internal terminator (optional)

3.5 RS-485 Full-duplex 4-wire Network

The 4-wire network simplifies bus arbitration in multi-node RS-485. A single Master node is the only driver allowed on the top most wire pair. All other nodes listen to all data traffic that passes on the party-line type multi-drop bus. Nodes may transmit on the lower pair of wires when addressed by the master node or by using a software token-passing bus arbitration scheme.

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Image 39
KTI Networks KSC-240 manual RS-485 Full-duplex 4-wire Network