E-32
FX Series PLC User's Manual - Data Communication Edition
Inverter Communication
4 Wiring
4.5 Connecting Terminal Resistors
4.5
Connecting Terminal Resistors
Connect a terminal resistor to both the communication equipment of the FX PLC and the RDA-RDB signal
terminal in the last inverter.
For details on connection, refer to each wiring diagram.
1. Terminal resistor types
Prepare the following two types of terminal resistors.
Among the terminal resistors supplied with the communication equipment,
select ones with the color codes shown to the right.
1) On the FX PLC side, use a terminal resistor of 110
, 1/2 W supplied
together with the communication equipment operating in accordance with
RS-485.
2) On the inverter side (PU connector except FR-A5NR, FR-E7TR), use a
terminal resistor of 100
, 1/2 W (not supplied).
3) On the inverter side (FR-A5NR), use a terminal resistor chip (supplied
together with the FR-A5NR).
4) On the inverter side (FR-E7TR), use the terminal resistor switch.
2. Connecting a terminal resistor to the FX PLC
Connect a terminal resistor between the RDA and RDB terminals of the communication equipment.
3. When using the FX
3U
-485-BD, FX
3G
-485-BD, FX
3G
-485-BD-RJ or FX
3U
-485ADP(-MB)
The FX
3G
-485-BD, FX
3U
-485-BD, FX
3G
-485-BD-RJ and FX
3U
-485ADP(-MB) have built-in terminal resistors.
Set the terminal resistor selector switch accordingly.
• FX
3U
-485-BD
• FX
3U
-485ADP(-MB)
• FX
3G
-485-BD
Remove the upper terminal block before changing over the switch in the FX
3G
-485-BD.
Removal: Loosen the terminal block mounting screws, and remove the terminal block.
Installation: Attach the terminal block, and tighten the terminal block mounting screws.
Tightening torque : 0.4 to 0.5 N•m
Do not tighten terminal screws with a torque outside the above-mentioned range. Failure to do
so may cause equipment failures or malfunctions.
For installation and removal of the terminal block, use the
recommended tool shown below or a tool having straight tip (such as
screwdriver) as shown in the right figure.
<Reference>
Manufacturer
Model name
Phoenix Contact Co., Ltd.
SZS 0.4
2.5
1 1 1 =110
Brown
(10
1
)
Precision
1 0 1 =100
(10
1
)
Black
Precision
Brown
Brown
Terminal
resistor selector
switch
330
OPEN
110
Terminal
resistor
selector
switch
(0.01")
(0.09")
0.4mm
2.5mm
Select a
screwdriver
with a
straight tip.
Terminal block mounting screws
Terminal resistor
selector switch
Summary of Contents for FX-485ADP
Page 2: ......
Page 120: ...B 2 FX Series PLC User s Manual Data Communication Edition N N Network ...
Page 188: ...C 2 FX Series PLC User s Manual Data Communication Edition Parallel Link ...
Page 244: ...D 2 FX Series PLC User s Manual Data Communication Edition Computer Link ...
Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
Page 700: ...H 2 FX Series PLC User s Manual Data Communication Edition Programming Communication ...
Page 752: ...I 2 FX Series PLC User s Manual Data Communication Edition Remote Maintenance ...
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