Westermo LD-63B AC, Руководство по установке

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16 6072-2021
RS-422/485
Example: Multidrop
Connection of RS-422, RS-485
LD-63B
RX1 RX2
TX2 TX1
RX1 RX2
TX2 TX1
LD-63B LD-63B
RS-422/485 RS-422/485
RX1 RX2
TX2 TX1
1 2 3 4 5 L N
RS-422/485 POWER
R+
Rx2
Tx1
Tx2
R- T+ T-
1 2 3 4 5 L N
RS-422/485 POWER
R+
Rx2
Tx1
Tx2
R- T+ T-
R
+
RS-422
equipment
R
–
T
+
T
–
RS-485
equipment
T
+
T
–
*) The designations A, A’, B, B’ are sometimes use instead of T+, T–, R+, R–.
Despite the standard, different manufacturers name the signals differently.
The first step in fault finding is to reverse the cables (swap T+ with T– and/or
R+ with R–). Please note that this should be done only at one end!
* *
S1:2 ON
NB When a multidrop connection ends with an LD-63B and the fibre pair
is connected on channel 2, the switch S1:2 must be set (Y-function)
Y-funktion
AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : info@audin.fr