C4-9, Important, Lconnection in 4-wrie type – Yokogawa YFGW410 User Manual
Page 47: Lconnection in 2-wire type, Lmodbus/rtu, Yfgw410 host system
<C4. Wiring>
C4-9
IM 01W02D01-01EN
cation cables, use shielded twisted pair cables (cables for RS-422/RS-485 communication are
recommended).
IMPORTANT
All RS-485 configuration switches are set to OFF by default. When connecting cables to the RS-
485 connector, set RS-485 configuration switches to fit actual connection before power on.
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Connection in 4-wrie Type
YFGW410
Host System
TX+
TX-
RX+
RX-
SG
FG
TX+
TX-
RX+
RX-
SG
FG
R1
R2
R2
R1: Termination resistance of 120 Ω (comes with YFGW410)
R2: According to the instruction on the external equipment
RS-485 Configuration Switches
SW602
SW603
SW604
SW605
OFF
OFF
OFF
ON
FC0409.ai
Figure C4-7 Connection and Configuration in 4-wire Type
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Connection in 2-wire Type
RS-485 Configuration Switches
SW602
SW603
SW604
SW605
ON
OFF
ON
ON
FC0410.ai
YFGW410
Host System
TX+
TX-
RX+
RX-
SG
FG
TX+
TX-
RX+
RX-
SG
FG
R1
R2
R1: Termination resistance of 120 Ω (comes with YFGW410)
R2: According to the instruction on the external equipment
Figure C4-8 Connection and Configuration in 2-wire Type
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Modbus/RTU
Following table shows Modbus/RTU communication parameter of YFGW410. The host system
should be configured in accordance with following parameters.
.