Communication connectors and terminals
53
2
2.8
Communication connectors and terminals
2.8.1
RS-485 terminal block
Connecting the RS-485 terminals of the master/slave converter units enables communication for parallel operation.
RS-485 terminal layout
Wiring the RS-485 terminals
• Use a four, twisted-pair wires for connection.
• The size of RS-485 terminal block is the same as that of the control circuit terminal block. Refer to
for the wiring
method.
NOTE
• The total length of the wires between the RS-485 terminals must be within 5 m.
• To avoid malfunction, keep the RS-485 terminal wires away from the control circuit board.
Name
Description
RXD1+
Converter unit
RXD1-
Converter unit receive-
RXD2+
Converter unit (for branch)
RXD2-
Converter unit receive- (for branch)
TXD1+
Converter unit send+
TXD1-
Converter unit send-
TXD2+
Converter unit send+ (for branch)
TXD2-
Converter unit send- (for branch)
VCC
5 V
Permissible load current 100 mA
GND
Earth (ground) (connected to terminal SD)
+
-
+ TXD
RXD
-
VCC
GND
+
-
+ TXD
RXD
-
VCC
GND
OPEN
100Ω
RXD1+
RXD1-
RXD2+
RXD2-
TXD1+
TXD1-
TXD2+
TXD2-
VCC
GND
VCC
GND
Terminating resistor switch
Initially-set to "OPEN".
Set only the terminating resistor switch of
the remotest converter unit to the "100 Ω" position.
Summary of Contents for FR-CC2-P
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