YOKOGAWA SSC60D - Page 158

l
1 to 1 Connection in 4-wire T
ype
ALR121
TX+
TX-
RX+
RX-
SG
R1
R1: Termination resistance of 120 ohm
R2: According to the instruction on the subsystem side
External device
TX+
TX-
RX+
RX-
SG
FG
R2
R2
Figure 5.5.2-6 1 to 1 Connection in 4-wire Type
l
1 to 1 Connection in 2-wire T
ype
When ALR121 is specified for 2-wire connection by the builder, “TX+ and RX+”, “TX- and RX-”
are automatically connected within the module.
ALR121
TX+
TX-
RX+
RX-
SG
R1
TX+
TX-
RX+
RX-
SG
FG
R2
External device
R1: Termination resistance of 120 ohm
R2: According to the instruction on the subsystem side
Figure 5.5.2-7 1 to 1 Connection in 2-wire Type
<5.5 Connection of Communication Modules > 5-44
IM 32Q06C10-31E 4th Edition : Jan.30,2015-00