422 operation, Lk6 and lk7, Should be in posit – Eurotech Appliances VIPER / VIPER-LITE PXA255 User Manual
Page 99: E network. see, Rs485/422, Configuration – lk4, lk5, lk6 and lk7, 371h, For det, Required, Rs485/422 configuration – lk4, lk5, lk6 and lk7
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VIPER Technical Manual
Connectors, LEDs and jumpers
© 2007 Eurotech Ltd Issue E
99
RS485/422 configuration – LK4, LK5, LK6 and LK7 on JP1
These jumpers are used to enable/disable the RS485 receive buffer and RS485/422
line termination. See
, for more details.
LK4 Description
(RS485 TX/RX) RS422 TX line
termination resistor (120
Ω) connected.
(RS485 TX/RX) RS422 TX line
termination resistor (120
Ω)
disconnected.
LK5 Description
RS422 RX line termination resistor
(120
Ω) connected.
RS422 RX line termination resistor
(120
Ω) disconnected.
LK6 & LK7
Description
RS422 full-duplex.
RS485 half-duplex.
Only fit LK4 and LK5 if the VIPER is at the end of the network.
VL
Default setting:
Default setting:
Default setting:
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