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20
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5) Connection of Low order communication RS-485
Connect SA1, SB1 of KR2000 and SA, SB of low order connected instrument like the following figure.
Refer to instruction manual of each instrument for detail method of low order instrument connection.
RD
SD
SG
RDA
RDB
SDA
SDB
1
2
3
4
5
6
7
8
Protocol converter
(SC8-10)
Within 15m
Within 1.2km
Termination
resistor
100
Ω
・
1/4W
RD
SD
SG
2
3
9
This recorder
SA1
SB1
SG
SA2
SB2
Example of connection 2 (SYSMAC)
SYSMAC
CPU unit
Internal RS232C port
(D-SUB 9-pin receptacle)
RS-232C
RS-485
Transmitting
data
Internal
cir
cuit
Receiving
data
SB
SA
Connection example 1
KR2000
Low order
communications terminal
AL/AH
SE3000 , MELSEC
SG
RDB
RDA
SDB
SDA
SG
SB
SA
SG
SB1
SA1
Termination
resistance
100
Ω
・
1/4W
For details of low order connection instrument and input points, refer to “16. low order
communications programming”.
SB2
SA2
Summary of Contents for KR2000
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