3-4
IMSBR08-E2
(The following figure illustrates the case when the host computer’s interface is RS-232.)
Terminator (built-in) 120
Ω
1/2W or greater
#1
RS-422A/485
terminal on the
recorder
#2
#n
(#n 32)
SG
R(B)
R(A)
T(B)
T(A)
FG
SG
RD B
RD A
SD B
SD A
Host
computer
Converter
(SG)
(RD B)
(RD A)
(SDB)
(SDA)
FG
SG
RD B
RD A
SD B
SD A
(SG)
(RD B)
(RD A)
(SDB)
(SDA)
FG
SG
RD B
RD A
SD B
SD A
(SG)
(RD B)
(RD A)
(SDB)
(SDA)
RS-232
COM-K
* When our communication converter COM-K (sold separately) be used.
• Two-Wire System
Connect the transmission and reception signals with the same polarity on the RS-422A/485 terminal block.
The two-wire system can be used only when using the Modbus protocol.
Terminator (externally attached) 120
Ω
, 1/2 W or more
#
1
Do not connect terminator to
#
1 to
#
n–1
#
2
#
n
(
#
n
≤
31)
Terminator (externally attached)
Host
computer
SG
RDB( + )
RDA( – )
SDB( + )
SDA( – )
FG
SG
RD B
RD A
SD B
SD A
(SG)
(B)
(A)
(B)
(A)
FG
SG
RD B
RD A
SD B
SD A
(SG)
FG
SG
RD B
RD A
SD B
SD A
(SG)
(B)
(A)
RS-422A/485
terminal on the
recorder
3.2 Terminal Arrangement and Signal Names and the Connection Procedure of the RS-422A/485 Communication Interface
Summary of Contents for SBR-EW100
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