9
IM 04L05A01-02E
Wiring
Describes the input signal wiring and the power supply wiring. For the wiring to option
terminals, etc., see chapter 2 of IM04L05A01-01E (DX100P) or IM04L06A01-01E
(DX200P).
Rear Panel
Ethernet
(See IM04L05A01-17E)
Measurement input
terminal 2
Measurement input
terminal 3
Measurement input
terminal 1
Power terminal (100 to 240 VAC)
L N
Ethernet
(See IM04L05A01-17E)
DX100P
DX200P
Power terminal
(100 to 240 VAC)
Measurement input
terminal
L N
Input Signal Wiring
Precautions to Be Taken While Wiring
Take the following precautions when wring the input signal cables.
• It is recommended that crimp-on lugs (designed for 4 mm screws) with
insulation sleeves be used on the lead wire ends. However, this does not apply
to the optional clamped terminals (optional code /H2).
Crimp-on lug
• For clamped input terminals (/H2), the following wires are recommended.
• Cross sectional area of the conductor or conductors
Single conductor: 0.14 mm
2
to 1.5 mm
2
Stranded conductors: 0.14 mm
2
to 1.0 mm
2
• Stripped cable length: approximately 5 mm
• Take measures to prevent noise from entering the measurement circuit.
• Move the measurement circuit away from the power cable (power circuit) and
ground cable.
• It is desirable that the item being measured does not generate noise. However, if
this is unavoidable, isolate the measurement circuit from the item. Also, ground the
item being measured.
• Shielded wires should be used to minimize noise caused by electrostatic induction.
Connect the shield to the ground terminal of the DXP as necessary (make sure you
are not grounding at two points).
• To minimize noise caused by electromagnetic induction, twist the measurement
circuit wires at short, equal intervals.
• Make sure to earth ground the protective ground terminal through minimum
resistance (less than 100
Ω
).
• When using internal reference junction compensation on the thermocouple
input, take measures to stabilize the temperature at the input terminal.
• Always use the input terminal cover.
• Do not use thick wires which may cause large heat dissipation (cross sectional
area 0.5 mm
2
or less recommended).
• Make sure that the ambient temperature remains reasonably stable. Large
temperature fluctuations can occur if a nearby fan turns ON or OFF.