OCEM AUGIER energy DIAM3100 Series, Установка и обслуживание

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DIAM3100©2012 AUGIER SA.
II-35
II.2.2.1 RS485/RS422 JBUS link:
Each serial link is equipped with two SubD 9-pin (1 female and 1 male sockets).
The links are electrically insulated from all the other circuits:
Sub D connectors:
Pin RS422/RS485
function
Pin Type
1 T+ Output
2 T- Output
3 NC
4 NC
5 NC
6 R+ Input
7 R- Input
8 NC
9 NC
RS422/RS485 network polarity and termination
Link number Function Dip switch
1
Termination impedance
S5-1
S5-2
Polarising resistors
S5-3
S5-4
2
Termination impedance
S5-5
S5-6
Polarising resistors
S5-7
S5-8
Polarising resistors.
Set the two switches to “ON” to activate the two polarising resistors on lines R- and R+. (value = 2200 ohms)
Generally, these switches are set to ON for the CCR on the end of the line. For all other CCRs linked on the
same bus, leave them set to OFF.
Termination impedance.
-
Set the two switches to “ON” to insert a 120 ohm resistance in the Jbus line.
- This impedance must compulsorily be inserted in the last CCR in the line, and only in this one.
N.B. : do not forget to connect similar impedance on the input line of the master device (plc or micro-computer),
if this is placed at the end of the line and does not carry one.