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C3-6
IM 34M6H41-01E
3rd Edition : Aug. 1, 2005-00
(1)
RS-422-A/RS-485 terminal block
The module uses the 6-M3.5 screw terminal block.
SD A
SD B
RD A
RD B
SG
SHIELD
8.6 mm
7.3 mm
M3.5
Transmission data A
→
Transmission data B
→
Receive data A
←
Receive data B
←
Signal ground
Shield
F0307.EPS
Figure C3.7
RS-422-A/RS-485 Terminal Block
This module is connected to an external instrument as a 4- or 2-wire system. Figures C3.8
and C3.9 show the connection diagram for 4-wire system and 2-wire system respectively.
In the 4-wire system, SDA/SDB and RDA/RDB lines cross only between a higher-level
computer and the personal computer link module (refer to Figure C3.10).
SDA
SDB
RDA
RDB
SG
SHIELD
F3LC11-2N
SDA
SDB
RDA
RDB
SG
SHIELD
F3LC11-2N
SDA
SDB
RDA
RDB
SG
SHIELD
(SD A)
(SD B)
(RD A)
(RD B)
(SG)
Personal computer, etc.
F0308.EPS
Terminator
Terminator
Figure C3.8
4-wire Terminal Block Wiring Diagram
SG
SHIELD
SDA
SDB
RDA
RDB
SG
SHIELD
SDA
SDB
RDA
RDB
SG
SHIELD
(A)
(B)
(SG)
A
B
F3LC11-2N
F3LC11-2N
Personal computer, etc.
F0309.EPS
Terminator
Terminator
Figure C3.9
2-wire Terminal Block Wiring Diagram
CAUTION
-
In a 2-wire system, SDA-RDA, as well as SDB-RDB, should be shorted.
Содержание F3LC11-1F
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