Humandata USB-402, User Manual

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USB-402 (Ver.1.0)
4. Setting Switch
USB-402 can change operating mode by setting, switching echo cancelling and
terminal resistor.
4.1. RS-485/422(4 wire)
SWA2 - SWH2 Factory
Setting
1 2
4 wire OFF ON
* Please refer to Section 4.3
SWA1 - SWH1
1 2 3 4
No termination OFF OFF OFF OFF
SWA1 - SWH1
1 2 3 4
Transmit Side
termination
OFF OFF OFF ON
SWA1 - SWH1
1 2 3 4
Receive Side
termination
ON OFF OFF OFF
SWA1 - SWH1
1 2 3 4
Both Sides
termination
ON OFF OFF ON