2.7.1 RS-485/422 Driver and Receiver Control

The following table lists the possible DIP SW settings related to RS-485 and RS-422 driver and receiver control:

SW1-4 SW1-6

SW1-5

SW2-1

Behavior

TXE

RXC

RTS-D

SDD

Driver is enabled.

 

 

 

 

Receiver is disabled.

TXE

RXE

-

-

Driver is enabled.

 

 

 

 

Receiver is enabled.

TXC

RXE

RTS-D

SDD

Driver is disabled.

 

 

 

 

Receiver is enabled.

TXC

RXE

RTS-E

SDD

Driver controlled by RTS

 

 

 

 

Receiver is enabled.

TXC

RXC

RTS-E

SDD

Driver controlled by RTS

 

 

 

 

Receiver is enabled

 

 

 

 

when driver is disabled.

TXC

RXE

RTS-D

SDE

Driver controlled by ADC

 

 

 

 

Receiver is enabled.

TXC

RXC

RTS-D

SDE

Driver controlled by ADC

 

 

 

 

Receiver is enabled

 

 

 

 

when driver is disabled.

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KTI Networks KSC-240 manual 1 RS-485/422 Driver and Receiver Control, SW1-4 SW1-6 SW1-5 SW2-1 Behavior