B&B Electronics 4WSD9TB - Datasheet User Manual
Page 2
4WSD9TB-0712 - p2/5
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Table 1
– Switch Settings for Operating Mode
Switches
Switch 1 (Tx)
Switch 2 (Rx)
Switch 3 (bridge)
Switch 4 (bridge)
Operating Mode
RS-485 2-Wire Mode
(half duplex)
RS-485
Echo Off
2-Wire
2-Wire
RS-485 4-Wire Mode (full
duplex)
RS-485
Echo On
4-Wire
4-Wire
RS-422 4-Wire Mode
(full duplex)
RS-422
Echo On
4-Wire
4-Wire
Loopback Test Mode*
As Desired
Echo On
2-Wire
2-Wire
*
Used with HyperTerminal or another terminal program to confirm operation of data through converter.