Laurel Electronics Ethernet Node Configuration for Series 2 Digital Panel Meters, Counters, Timers, Transmitters and Ethernet-to-Serial Device Servers User Manual
Page 9
9
a
c
b
d
RS485 Interface
Board, Rev. J
RJ11
RJ11
RS485 meter board, Rev J
(shipped after April 2009)
Full duplex: No jumpers for short cable runs.
Add b + d for long cable runs.
Half duplex: a + c. Add d in last meter for long cable
runs.
c
a
d
RJ11
b
f
e
RS485 Interface
Board, Pre J
RJ11
RS485 meter board, pre-Rev J
(shipped before April 2009)
Full duplex: b + e bias jumpers on one meter only.
Add a + d in last meter for long cable runs.
Half duplex: b + e bias jumper on one meter only.
c + f for half duplex operation.
Add d in last meter for long cable runs.
RS485 boards used in remote meters
.
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