Vernier VE11 485, Руководство пользователя

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3. Terminal Resister
VE11U 485 hardware has Terminal resistor built in, user may add external terminal resistor if require.
The external terminal resister connection as below.
3-1. RS422 terminal resistor connection
3-2. RS485 terminal resistor connection
3-3. Terminal Resistor Specification
110 ohm: If distance between both end of RS422/485 devices in 1.2KM.
220 ohm: If distance between both end of RS422/485 devices in 600M.
330 ohm: If distance between both end of RS422/485 devices in 300M.