Connecting Cables; Connecting Terminal Resistors - Mitsubishi FX3U Series User Manual

FX Series Programmable Controllers
3U
User's Manual - MODBUS Serial Communication Edition
4.3.2

Connecting cables

1. European type terminal block
Use shielded twisted pair cables for connecting communication equipment operating in accordance with
MODBUS RS-485.
The table below shows applicable cables and tightening torques.
FX -485ADP-MB
3U
The cable ends, either stranded or solid, should be left as it is, or used with a bar terminal with insulating
sleeve.
• When leaving the cable end as it is
- Twist the end of stranded cables so that the individual wires do not poke out
- Do not plate the cable end
• When using a bar terminal with insulating sleeve
Because it is difficult to insert a cable into the insulating sleeve
depending on the cable sheath thickness, select the proper cable
according to the outline drawing.
Manufacturer
Phoenix Contact
• Tool
- When tightening a terminal on the European terminal block, use a
small straight-shaped commercial screwdriver, as shown in the figure
on the right.
Manufacturer
Phoenix Contact
4.3.3

Connecting terminal resistors

Make sure to provide a terminal resistor at each end of the line.
1. When using the FX
The FX -485ADP-MB has a built-in terminal resistor.
3U
Set the terminal resistor selector switch accordingly.
330 Ω
OPEN
110 Ω
Cable size when Cable size when
one cable is two cables are
connected connected
AWG22 to
AWG22
AWG20
Approx. 9 mm
(0.35")
Model name
AI 0.5-8WH
Model name
SZS 0.4 × 2.5
-485ADP-MB
3U
Terminal
resistor selector
switch
4.3 Selecting Cables and Terminal Resistors (MODBUS RS-
Cable size for bar
terminal with
insulating sleeve
AWG22 to AWG20
Caulking tool
CRIMPFOX UD6
Tool size
Tightening
torque
A
0.22 to 0.25
0.4 (0.01") 2.5 (0.09")
N·m
Insulating sleeve
Contact area
8 mm (0.31")
2.6 mm
14 mm
(0.1")
(0.55")
Select a
screwdriver
with a
straight tip.
A B
For sizes A and B, refer to the
table on the left.
4 Wiring
1
2
B
3
4
5
6
7
8
9
10
23